Publications


Combined Analysis of all Three Phases of Solar Neutrino Data from the Sudbury Neutrino Observatory

ArXiv (2011)

SNO Collaboration, B Aharmim, SN Ahmed, AE Anthony, N Barros, EW Beier, A Bellerive, B Beltran, M Bergevin, SD Biller, K Boudjemline, MG Boulay, B Cai, YD Chan, D Chauhan, M Chen, BT Cleveland, GA Cox, X Dai, H Deng, JA Detwiler, M DiMarco, PJ Doe, G Doucas, P-L Drouin, FA Duncan, M Dunford, ED Earle, SR Elliott, HC Evans, GT Ewan, J Farine, H Fergani, F Fleurot, RJ Ford, JA Formaggio, N Gagnon, JTM Goon, K Graham, E Guillian, S Habib, RL Hahn, AL Hallin, ED Hallman, PJ Harvey, R Hazama, WJ Heintzelman, J Heise, RL Helmer, A Hime, C Howard, M Huang, P Jagam, B Jamieson, NA Jelley, M Jerkins, KJ Keeter, JR Klein, LL Kormos, M Kos, C Kraus, CB Krauss, A Kruger, T Kutter, CCM Kyba, R Lange, J Law, IT Lawson, KT Lesko, JR Leslie, JC Loach, R MacLellan, S Majerus, HB Mak, J Maneira, R Martin, N McCauley, AB McDonald, SR McGee, ML Miller, B Monreal, J Monroe, BG Nickel, AJ Noble, HM O'Keeffe, NS Oblath, RW Ollerhead, GDO Gann, SM Oser, RA Ott, SJM Peeters, AWP Poon, G Prior, SD Reitzner, K Rielage, BC Robertson, RGH Robertson, RC Rosten, MH Schwendener, JA Secrest, SR Seibert, O Simard, JJ Simpson, P Skensved, TJ Sonley, LC Stonehill, G Tešić, N Tolich, T Tsui, RV Berg, BA VanDevender, CJ Virtue, HWC Tseung, DL Wark, PJS Watson, J Wendland, N West, JF Wilkerson, JR Wilson, JM Wouters, A Wright, M Yeh, F Zhang, K Zuber

We report results from a combined analysis of solar neutrino data from all phases of the Sudbury Neutrino Observatory. By exploiting particle identification information obtained from the proportional counters installed during the third phase, this analysis improved background rejection in that phase of the experiment. The combined analysis resulted in a total flux of active neutrino flavors from 8B decays in the Sun of (5.25 \pm 0.16(stat.)+0.11-0.13(syst.))\times10^6 cm^{-2}s^{-1}. A two-flavor neutrino oscillation analysis yielded \Deltam^2_{21} = (5.6^{+1.9}_{-1.4})\times10^{-5} eV^2 and tan^2{\theta}_{12}= 0.427^{+0.033}_{-0.029}. A three-flavor neutrino oscillation analysis combining this result with results of all other solar neutrino experiments and the KamLAND experiment yielded \Deltam^2_{21} = (7.41^{+0.21}_{-0.19})\times10^{-5} eV^2, tan^2{\theta}_{12} = 0.446^{+0.030}_{-0.029}, and sin^2{\theta}_{13} = (2.5^{+1.8}_{-1.5})\times10^{-2}. This implied an upper bound of sin^2{\theta}_{13} < 0.053 at the 95% confidence level (C.L.).


T2K: A LONG-BASELINE EXPERIMENT TO STUDY NEUTRINOS

MODERN PHYSICS LETTERS A 27 (2012) ARTN 1230017

A Weber


Combining neutrino oscillation experiments with the Feldman-Cousins method

New Journal of Physics 14 (2012)

AV Waldron, MD Haigh, A Weber, A Weber

In this paper we describe how two or more experimental results can be combined within the procedure of Feldman and Cousins, to provide combined confidence limits on the physical parameters of interest. We demonstrate the technique by combining the recent electron neutrino appearance results from T2K and MINOS. Our best fit point is sin 2 2θ 13 = 0.08 (0.11) and δ = 1.1 (2.0)π; in addition we exclude sin2 2θ 13 = 0 at 2.7σ (2.8σ) for the normal (inverted) neutrino mass hierarchy. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.


Search for Lorentz invariance and CPT violation with muon antineutrinos in the MINOS Near Detector

Physical Review D - Particles, Fields, Gravitation and Cosmology 85 (2012)

P Adamson, DS Ayres, G Barr, M Bishai, A Blake, GJ Bock, DJ Boehnlein, D Bogert, SV Cao, S Cavanaugh, S Childress, JAB Coelho, L Corwin, D Cronin-Hennessy, IZ Danko, JK De Jong, NE Devenish, MV Diwan, CO Escobar, JJ Evans, E Falk, GJ Feldman, MV Frohne, HR Gallagher, RA Gomes, MC Goodman, P Gouffon, N Graf, R Gran, K Grzelak, A Habig, J Hartnell, R Hatcher, A Himmel, A Holin, J Hylen, GM Irwin, Z Isvan, C James, D Jensen, T Kafka, SMS Kasahara, G Koizumi, S Kopp, M Kordosky, A Kreymer, K Lang, J Ling, J Ling, PJ Litchfield, PJ Litchfield, L Loiacono, P Lucas, WA Mann, ML Marshak, M Mathis, N Mayer, R Mehdiyev, JR Meier, MD Messier, WH Miller, SR Mishra, J Mitchell, CD Moore, L Mualem, S Mufson, J Musser, D Naples, JK Nelson, HB Newman, RJ Nichol, JA Nowak, WP Oliver, M Orchanian, RB Pahlka, J Paley, J Paley, RB Patterson, G Pawloski, G Pawloski, S Phan-Budd, RK Plunkett, X Qiu, A Radovic, J Ratchford, B Rebel, C Rosenfeld, HA Rubin, MC Sanchez, MC Sanchez, MC Sanchez, J Schneps, A Schreckenberger, P Schreiner, R Sharma, A Sousa, M Strait, N Tagg, RL Talaga, J Thomas

We have searched for sidereal variations in the rate of antineutrino interactions in the MINOS Near Detector. Using antineutrinos produced by the NuMI beam, we find no statistically significant sidereal modulation in the rate. When this result is placed in the context of the Standard Model Extension theory we are able to place upper limits on the coefficients defining the theory. These limits are used in combination with the results from an earlier analysis of MINOS neutrino data to further constrain the coefficients. © 2012 American Physical Society.


First muon-neutrino disappearance study with an off-axis beam

PHYSICAL REVIEW D 85 (2012) ARTN 031103

K Abe, N Abgrall, Y Ajima, H Aihara, JB Albert, C Andreopoulos, B Andrieu, MD Anerella, S Aoki, O Araoka, J Argyriades, A Ariga, T Ariga, S Assylbekov, D Autiero, A Badertscher, M Barbi, GJ Barker, G Barr, M Bass, M Batkiewicz, F Bay, S Bentham, V Berardi, BE Berger, I Bertram, M Besnier, J Beucher, D Beznosko, S Bhadra, FDMM Blaszczyk, A Blondel, C Bojechko, J Bouchez, SB Boyd, A Bravar, C Bronner, DG Brook-Roberge, N Buchanan, H Budd, RG Calland, D Calvet, J Caravaca Rodriguez, SL Cartwright, A Carver, R Castillo, MG Catanesi, A Cazes, A Cervera, C Chavez, S Choi, G Christodoulou, J Coleman, G Collazuol, W Coleman, K Connolly, A Curioni, A Dabrowska, I Danko, R Das, GS Davies, S Davis, M Day, G De Rosa, JPAM de Andre, P de Perio, T Dealtry, A Delbart, C Densham, F Di Lodovico, S Di Luise, PD Tran, J Dobson, U Dore, O Drapier, T Duboyski, F Dufour, J Dumarchez, S Dytman, M Dziewiecki, M Dziomba, S Emery, A Ereditato, JE Escallier, L Escudero, LS Esposito, M Fechner, A Ferrero, AJ Finch, E Frank, Y Fujii, Y Fukuda, V Galymov, GL Ganetis, FC Gannaway, A Gaudin, A Gendotti, MA George, S Giffin, C Giganti, K Gilje, AK Ghosh, T Golan, M Goldhaber, JJ Gomez-Cadenas, S Gomi, M Gonin, N Grant, A Grant, P Gumplinger, P Guzowski, DR Hadley, A Haesler, MD Haigh, K Hamano, C Hansen, D Hansen, T Hara, PF Harrison, B Hartfiel, M Hartz, T Haruyama, T Hasegawa, NC Hastings, A Hatzikoutelis, K Hayashi, Y Hayato, C Hearty, RL Helmer, R Henderson, N Higashi, J Hignight, A Hillairet, T Hiraki, E Hirose, J Holeczek, S Horikawa, K Huang, A Hyndman, AK Ichikawa, K Ieki, M Ieva, M Iida, M Ikeda, J Ilic, J Imber, T Ishida, C Ishihara, T Ishii, SJ Ives, M Iwasaki, K Iyogi, A Izmaylov, B Jamieson, RA Johnson, KK Joo, GV Jover-Manas, CK Jung, H Kaji, T Kajita, H Kakuno, J Kameda, K Kaneyuki, D Karlen, K Kasami, I Kato, H Kawamuko, E Kearns, M Khabibullin, F Khanam, A Khotjantsev, D Kielczewska, T Kikawa, J Kim, JY Kim, SB Kim, N Kimura, B Kirby, J Kisiel, P Kitching, T Kobayashi, G Kogan, S Koike, A Konaka, LL Kormos, A Korzenev, K Koseki, Y Koshio, Y Kouzuma, K Kowalik, V Kravtsov, I Kreslo, W Kropp, H Kubo, J Kubota, Y Kudenko, N Kulkarni, Y Kurimoto, R Kurjata, T Kutter, J Lagoda, K Laihem, M Laveder, M Lawe, KP Lee, PT Le, JM Levy, C Licciardi, IT Lim, T Lindner, C Lister, RP Litchfield, M Litos, A Longhin, GD Lopez, PF Loverre, L Ludovici, T Lux, M Macaire, L Magaletti, K Mahn, Y Makida, M Malek, S Manly, A Marchionni, AD Marino, AJ Marone, J Marteau, JF Martin, T Maruyama, T Maryon, J Marzec, P Masliah, EL Mathie, C Matsumura, K Matsuoka, V Matveev, K Mavrokoridis, E Mazzucato, N McCauley, KS McFarland, C McGrew, T McLachlan, M Messina, W Metcalf, C Metelko, M Mezzetto, P Mijakowski, CA Miller, A Minamino, O Mineev, S Mine, AD Missert, G Mituka, M Miura, K Mizouchi, L Monfregola, F Moreau, B Morgan, S Moriyama, A Muir, A Murakami, JF Muratore, M Murdoch, S Murphy, J Myslik, N Nagai, T Nakadaira, M Nakahata, T Nakai, K Nakajima, T Nakamoto, K Nakamura, S Nakayama, T Nakaya, D Naples, ML Navin, TC Nicholls, B Nielsen, C Nielsen, K Nishikawa, H Nishino, K Nitta, T Nobuhara, JA Nowak, Y Obayashi, T Ogitsu, H Ohhata, T Okamura, K Okumura, T Okusawa, SM Oser, M Otani, RA Owen, Y Oyama, T Ozaki, MY Pac, V Palladino, V Paolone, P Paul, D Payne, GF Pearce, JD Perkin, V Pettinacci, F Pierre, E Poplawska, B Popov, M Posiadala, J-M Poutissou, R Poutissou, P Przewlocki, W Qian, JL Raaf, E Radicioni, PN Ratoff, TM Raufer, M Ravonel, M Raymond, M Reeves, F Retiere, A Robert, PA Rodrigues, E Rondio, JM Roney, B Rossi, S Roth, A Rubbia, D Ruterbories, S Sabouri, R Sacco, K Sakashita, F Sanchez, A Sarrat, K Sasaki, K Scholberg, J Schwehr, M Scott, DI Scully, Y Seiya, T Sekiguchi, H Sekiya, M Shibata, Y Shimizu, M Shiozawa, S Short, PD Sinclair, M Siyad, BM Smith, RJ Smith, M Smy, JT Sobczyk, H Sobel, M Sorel, A Stahl, P Stamoulis, J Steinmann, B Still, J Stone, C Strabel, R Sulej, A Suzuki, K Suzuki, S Suzuki, SY Suzuki, Y Suzuki, Y Suzuki, T Szeglowski, M Szeptycka, R Tacik, M Tada, M Taguchi, S Takahashi, A Takeda, Y Takenaga, Y Takeuchi, K Tanaka, HA Tanaka, M Tanaka, MM Tanaka, N Tanimoto, K Tashiro, I Taylor, A Terashima, D Terhorst, R Terri, LF Thompson, A Thorley, W Toki, S Tobayama, T Tomaru, Y Totsuka, C Touramanis, T Tsukamoto, M Tzanov, Y Uchida, K Ueno, A Vacheret, M Vagins, G Vasseur, O Veledar, T Wachala, JJ Walding, AV Waldron, CW Walter, PJ Wanderer, J Wang, MA Ward, GP Ward, D Wark, MO Wascko, A Weber, R Wendell, N West, LH Whitehead, G Wikstroem, RJ Wilkes, MJ Wilking, Z Williamson, JR Wilson, RJ Wilson, T Wongjirad, S Yamada, Y Yamada, A Yamamoto, K Yamamoto, Y Yamanoi, H Yamaoka, T Yamauchi, C Yanagisawa, T Yano, S Yen, N Yershov, M Yokoyama, T Yuan, A Zalewska, J Zalipska, L Zambelli, K Zaremba, M Ziembicki, ED Zimmerman, M Zito, J Zmuda, T Collaboration


First muon-neutrino disappearance study with an off-axis beam

Physical Review D - Particles, Fields, Gravitation and Cosmology 85 (2012)

K Abe, K Abe, N Abgrall, Y Ajima, Y Ajima, H Aihara, H Aihara, JB Albert, C Andreopoulos, B Andrieu, MD Anerella, S Aoki, O Araoka, O Araoka, J Argyriades, A Ariga, T Ariga, S Assylbekov, D Autiero, A Badertscher, M Barbi, GJ Barker, G Barr, M Bass, M Batkiewicz, F Bay, S Bentham, V Berardi, BE Berger, I Bertram, M Besnier, J Beucher, D Beznosko, S Bhadra, FDMM Blaszczyk, A Blondel, C Bojechko, J Bouchez, SB Boyd, A Bravar, C Bronner, C Bronner, DG Brook-Roberge, N Buchanan, H Budd, RG Calland, D Calvet, J Caravaca Rodríguez, SL Cartwright, A Carver, R Castillo, MG Catanesi, A Cazes, A Cervera, C Chavez, S Choi, G Christodoulou, J Coleman, G Collazuol, W Coleman, K Connolly, A Curioni, A Dabrowska, I Danko, R Das, GS Davies, S Davis, M Day, G De Rosa, JPAM De André, P De Perio, T Dealtry, T Dealtry, A Delbart, C Densham, F Di Lodovico, S Di Luise, P Dinh Tran, J Dobson, U Dore, O Drapier, T Duboyski, F Dufour, J Dumarchez, S Dytman, M Dziewiecki, M Dziomba, S Emery, A Ereditato, JE Escallier, L Escudero, LS Esposito, M Fechner, M Fechner, A Ferrero, AJ Finch, E Frank, Y Fujii, Y Fujii, Y Fukuda

We report a measurement of muon-neutrino disappearance in the T2K experiment. The 295-km muon-neutrino beam from Tokai to Kamioka is the first implementation of the off-axis technique in a long-baseline neutrino oscillation experiment. With data corresponding to 1.43×1020 protons on target, we observe 31 fully-contained single μ-like ring events in Super-Kamiokande, compared with an expectation of 104±14(syst) events without neutrino oscillations. The best-fit point for two-flavor ν μ→ν τ oscillations is sin2(2θ 23)=0.98 and |Δm322|=2.65×10 -3eV2. The boundary of the 90% confidence region includes the points ( sin2(2θ 23), |Δm322|)=(1.0,3.1×10 -3eV2), (0.84, 2.65×10 -3eV2) and (1.0, 2.2×10 -3eV2). © 2012 American Physical Society.


Measurements of the T2K neutrino beam properties using the INGRID on-axis near detector

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 694 (2012) 211-223

K Abe, N Abgrall, Y Ajima, H Aihara, JB Albert, C Andreopoulos, B Andrieu, MD Anerella, S Aoki, O Araoka, J Argyriades, A Ariga, T Ariga, S Assylbekov, D Autiero, A Badertscher, M Barbi, GJ Barker, G Barr, M Bass, M Batkiewicz, F Bay, S Bentham, V Berardi, BE Berger, I Bertram, M Besnier, J Beucher, D Beznosko, S Bhadra, FDM Blaszczyk, J Blocki, A Blondel, C Bojechko, J Bouchez, SB Boyd, A Bravar, C Bronner, DG Brook-Roberge, N Buchanan, H Budd, D Calvet, SL Cartwright, A Carver, R Castillo, MG Catanesi, A Cazes, A Cervera, C Chavez, S Choi, G Christodoulou, J Coleman, G Collazuol, W Coleman, K Connolly, A Curioni, A Dabrowska, I Danko, R Das, GS Davies, S Davis, M Day, G De Rosa, JPAM De André, P De Perio, T Dealtry, T Dealtry, A Delbart, C Densham, F Di Lodovico, S Di Luise, P Dinh Tran, J Dobson, U Dore, O Drapier, F Dufour, J Dumarchez, S Dytman, M Dziewiecki, M Dziomba, S Emery, A Ereditato, JE Escallier, L Escudero, LS Esposito, M Fechner, M Fechner, A Ferrero, AJ Finch, E Frank, Y Fujii, Y Fukuda, V Galymov, GL Ganetis, FC Gannaway, A Gaudin, A Gendotti, M George, S Giffin, C Giganti

Precise measurement of neutrino beam direction and intensity was achieved based on a new concept with modularized neutrino detectors. INGRID (Interactive Neutrino GRID) is an on-axis near detector for the T2K long baseline neutrino oscillation experiment. INGRID consists of 16 identical modules arranged in horizontal and vertical arrays around the beam center. The module has a sandwich structure of iron target plates and scintillator trackers. INGRID directly monitors the muon neutrino beam profile center and intensity using the number of observed neutrino events in each module. The neutrino beam direction is measured with accuracy better than 0.4 mrad from the measured profile center. The normalized event rate is measured with 4% precision. © 2012 Elsevier B.V. All rights reserved.


Search for Lorentz invariance and CPT violation with muon antineutrinos in the MINOS Near Detector

PHYSICAL REVIEW D 85 (2012) ARTN 031101

P Adamson, DS Ayres, G Barr, M Bishai, A Blake, GJ Bock, DJ Boehnlein, D Bogert, SV Cao, S Cavanaugh, S Childress, JAB Coelho, L Corwin, D Cronin-Hennessy, IZ Danko, JK de Jong, NE Devenish, MV Diwan, CO Escobar, JJ Evans, E Falk, GJ Feldman, MV Frohne, HR Gallagher, RA Gomes, MC Goodman, P Gouffon, N Graf, R Gran, K Grzelak, A Habig, J Hartnell, R Hatcher, A Himmel, A Holin, J Hylen, GM Irwin, Z Isvan, C James, D Jensen, T Kafka, SMS Kasahara, G Koizumi, S Kopp, M Kordosky, A Kreymer, K Lang, J Ling, PJ Litchfield, L Loiacono, P Lucas, WA Mann, ML Marshak, M Mathis, N Mayer, R Mehdiyev, JR Meier, MD Messier, WH Miller, SR Mishra, J Mitchell, CD Moore, L Mualem, S Mufson, J Musser, D Naples, JK Nelson, HB Newman, RJ Nichol, JA Nowak, WP Oliver, M Orchanian, RB Pahlka, J Paley, RB Patterson, G Pawloski, S Phan-Budd, RK Plunkett, X Qiu, A Radovic, J Ratchford, B Rebel, C Rosenfeld, HA Rubin, MC Sanchez, J Schneps, A Schreckenberger, P Schreiner, R Sharma, A Sousa, M Strait, N Tagg, RL Talaga, J Thomas, MA Thomson, G Tinti, R Toner, D Torretta, G Tzanakos, J Urheim, P Vahle, B Viren, JJ Walding, A Weber, RC Webb, C White, L Whitehead, SG Wojcicki, R Zwaska, MINOS Collaboration


Improved measurement of muon antineutrino disappearance in MINOS

Physical Review Letters 108 (2012)

P Adamson, DS Ayres, C Backhouse, G Barr, M Bishai, A Blake, GJ Bock, DJ Boehnlein, D Bogert, SV Cao, S Childress, JAB Coelho, L Corwin, D Cronin-Hennessy, IZ Danko, JK De Jong, NE Devenish, MV Diwan, CO Escobar, JJ Evans, E Falk, GJ Feldman, MV Frohne, HR Gallagher, RA Gomes, MC Goodman, P Gouffon, N Graf, R Gran, K Grzelak, A Habig, J Hartnell, R Hatcher, A Himmel, A Holin, X Huang, J Hylen, GM Irwin, Z Isvan, DE Jaffe, C James, D Jensen, T Kafka, SMS Kasahara, G Koizumi, S Kopp, M Kordosky, A Kreymer, K Lang, J Ling, J Ling, PJ Litchfield, PJ Litchfield, L Loiacono, P Lucas, WA Mann, ML Marshak, M Mathis, N Mayer, R Mehdiyev, JR Meier, MD Messier, DG Michael, WH Miller, SR Mishra, J Mitchell, CD Moore, L Mualem, S Mufson, J Musser, D Naples, JK Nelson, HB Newman, RJ Nichol, JA Nowak, WP Oliver, M Orchanian, RB Pahlka, J Paley, J Paley, RB Patterson, G Pawloski, G Pawloski, S Phan-Budd, RK Plunkett, X Qiu, A Radovic, J Ratchford, B Rebel, C Rosenfeld, HA Rubin, MC Sanchez, MC Sanchez, MC Sanchez, J Schneps, A Schreckenberger, P Schreiner, R Sharma, A Sousa, M Strait

We report an improved measurement of ν ̄μ disappearance over a distance of 735 km using the MINOS detectors and the Fermilab Main Injector neutrino beam in a ν ̄μ-enhanced configuration. From a total exposure of 2.95×1020 protons on target, of which 42% have not been previously analyzed, we make the most precise measurement of Δm ̄2=[2.62-0.28+0.31(stat)±0. 09(syst)]×10 -3eV2 and constrain the ν ̄μ mixing angle sin2(2θ̄)>0.75 (90% C.L.). These values are in agreement with Δm2 and sin2(2θ) measured for ν μ, removing the tension reported in. © 2012 American Physical Society.


The T2K ND280 off-axis pi-zero detector

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 686 (2012) 48-63

S Assylbekov, G Barr, BE Berger, H Berns, D Beznosko, A Bodek, R Bradford, R Bradford, N Buchanan, H Budd, Y Caffari, K Connolly, I Danko, R Das, S Davis, M Day, S Dytman, M Dziomba, R Flight, D Forbush, K Gilje, D Hansen, J Hignight, J Imber, RA Johnson, CK Jung, V Kravtsov, PT Le, GD Lopez, CJ Malafis, S Manly, AD Marino, KS McFarland, C McGrew, C Metelko, G Nagashima, D Naples, TC Nicholls, B Nielsen, V Paolone, P Paul, GF Pearce, W Qian, K Ramos, E Reinherz-Aronis, PA Rodrigues, D Ruterbories, J Schmidt, J Schwehr, M Siyad, J Steffens, AS Tadepalli, IJ Taylor, M Thorpe, W Toki, W Toki, C Vanek, D Warner, A Weber, A Weber, RJ Wilkes, RJ Wilson, C Yanagisawa, C Yanagisawa, T Yuan

The pi-zero detector (POD) is one of the subdetectors that makes up the off-axis near detector for the Tokai-to-Kamioka (T2K) long baseline neutrino experiment. The primary goal for the POD is to measure the relevant cross-sections for neutrino interactions that generate π0s, especially the cross-section for neutral current π0 interactions, which are one of the dominant sources of background to the νμ→ νe appearance signal in T2K. The POD is composed of layers of plastic scintillator alternating with water bags and brass sheets or lead sheets and is one of the first detectors to use Multi-Pixel Photon Counters (MPPCs) on a large scale. © 2012 Elsevier B.V. All rights reserved.


New measurements of the transverse beam asymmetry for elastic electron scattering from selected nuclei

Physical Review Letters 109 (2012)

S Abrahamyan, A Acha, A Afanasev, Z Ahmed, H Albataineh, K Aniol, DS Armstrong, W Armstrong, J Arrington, T Averett, B Babineau, SL Bailey, J Barber, A Barbieri, A Beck, V Bellini, R Beminiwattha, H Benaoum, J Benesch, F Benmokhtar, P Bertin, T Bielarski, W Boeglin, P Bosted, F Butaru, E Burtin, J Cahoon, A Camsonne, M Canan, P Carter, CC Chang, GD Cates, YC Chao, C Chen, JP Chen, S Choi, E Chudakov, E Cisbani, B Craver, F Cusanno, F Cusanno, MM Dalton, R De Leo, K De Jager, K De Jager, W Deconinck, W Deconinck, P Decowski, D Deepa, X Deng, A Deur, D Dutta, A Etile, C Ferdi, RJ Feuerbach, JM Finn, D Flay, GB Franklin, M Friend, S Frullani, E Fuchey, E Fuchey, SA Fuchs, K Fuoti, F Garibaldi, E Gasser, R Gilman, R Gilman, A Giusa, A Glamazdin, LE Glesener, J Gomez, M Gorchtein, M Gorchtein, J Grames, K Grimm, C Gu, O Hansen, J Hansknecht, O Hen, DW Higinbotham, RS Holmes, T Holmstrom, CJ Horowitz, J Hoskins, J Huang, J Huang, TB Humensky, CE Hyde, CE Hyde, H Ibrahim, H Ibrahim, F Itard, CM Jen, E Jensen, X Jiang, X Jiang, G Jin, S Johnston, J Katich

We have measured the beam-normal single-spin asymmetry A n in the elastic scattering of 1-3 GeV transversely polarized electrons from H1 and for the first time from He4, C12, and Pb208. For H1, He4, and C12, the measurements are in agreement with calculations that relate A n to the imaginary part of the two-photon exchange amplitude including inelastic intermediate states. Surprisingly, the Pb208 result is significantly smaller than the corresponding prediction using the same formalism. These results suggest that a systematic set of new A n measurements might emerge as a new and sensitive probe of the structure of heavy nuclei. © 2012 American Physical Society.


Synchronization between remote sites for the MINOS experiment

44th Annual Precise Time and Time Interval (PTTI) Systems and Applications Meeting 2012 (2012) 99-117

S Römisch, SR Jefferts, V Zhang, TE Parker, N Ashby, P Adamson, G Barr, A Habig, J Meier, C James, R Nicol, R Plunkett, C Rosenfeld, R Bumgarner, M Christensen, J Hirschauer, B Fonville, S Mitchell, A McKinley, E Powers, J Wright, D Matsakis

In the context of time-of-flight measurements, the timing at the departure and arrival locations is obviously critical to the outcome of the experiment. In the case of neutrino time-of-flight experiments, the locations are many hundreds of kilometers apart with synchronization requirements of nanoseconds for several months at a time. In addition to the already stringent set of requirements outlined above, the locations of the origin of the particle beam and the detector need to be precisely determined. NIST and USNO have provided the MINOS (Main Injector Neutrino Oscillation Search) collaboration with both hardware and expertise to synchronize the two sites of the experiment, the accelerator at Fermilab in Batavia, IL and the Soudan Mine in northern Minnesota. Two GPS receivers are installed at each location where the local clocks are commercial Cesium clocks. Two more GPS receivers are constantly traveling between locations (including NIST in Boulder, CO) to provide multiple differential calibrations of the fixed receivers. The availability of the TWTFST equipment from USNO allowed for one comparison between the GPS and TWSTFT for the link between the locations, providing an independent means of determining the accuracy of the synchronization. Several months of continuous GPS data are now available, including the two-way calibration instance and several differential GPS calibrations. The results of data processing yielded synchronization stability below one nanosecond with accuracy at the nanosecond level over several months. © (2012) by the Institute of Navigation. All rights reserved.


Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam

ArXiv (2011)

T Collaboration, K Abe, N Abgrall, Y Ajima, H Aihara, JB Albert, C Andreopoulos, B Andrieu, S Aoki, O Araoka, J Argyriades, A Ariga, T Ariga, S Assylbekov, D Autiero, A Badertscher, M Barbi, GJ Barker, G Barr, M Bass, F Bay, S Bentham, V Berardi, BE Berger, I Bertram, M Besnier, J Beucher, D Beznosko, S Bhadra, FDM Blaszczyk, A Blondel, C Bojechko, J Bouchez, SB Boyd, A Bravar, C Bronner, DG Brook-Roberge, N Buchanan, H Budd, D Calvet, SL Cartwright, A Carver, R Castillo, MG Catanesi, A Cazes, A Cervera, C Chavez, S Choi, G Christodoulou, J Coleman, W Coleman, G Collazuol, K Connolly, A Curioni, A Dabrowska, I Danko, R Das, GS Davies, S Davis, M Day, G DeRosa, JPAMD Andre, P dePerio, A Delbart, C Densham, F DiLodovico, S DiLuise, PD Tran, J Dobson, U Dore, O Drapier, F Dufour, J Dumarchez, S Dytman, M Dziewiecki, M Dziomba, S Emery, A Ereditato, L Escudero, LS Esposito, M Fechner, A Ferrero, AJ Finch, E Frank, Y Fujii, Y Fukuda, V Galymov, FC Gannaway, A Gaudin, A Gendotti, M George, S Giffin, C Giganti, K Gilje, T Golan, M Goldhaber, JJ Gomez-Cadenas, M Gonin, N Grant, A Grant, P Gumplinger, P Guzowski, A Haesler, MD Haigh, K Hamano, C Hansen, D Hansen, T Hara, PF Harrison, B Hartfiel, M Hartz, T Haruyama, T Hasegawa, NC Hastings, S Hastings, A Hatzikoutelis, K Hayashi, Y Hayato, C Hearty, RL Helmer, R Henderson, N Higashi, J Hignight, E Hirose, J Holeczek, S Horikawa, A Hyndman, AK Ichikawa, K Ieki, M Ieva, M Iida, M Ikeda, J Ilic, J Imber, T Ishida, C Ishihara, T Ishii, SJ Ives, M Iwasaki, K Iyogi, A Izmaylov, B Jamieson, RA Johnson, KK Joo, GV Jover-Manas, CK Jung, H Kaji, T Kajita, H Kakuno, J Kameda, K Kaneyuki, D Karlen, K Kasami, I Kato, E Kearns, M Khabibullin, F Khanam, A Khotjantsev, D Kielczewska, T Kikawa, J Kim, JY Kim, SB Kim, N Kimura, B Kirby, J Kisiel, P Kitching, T Kobayashi, G Kogan, S Koike, A Konaka, LL Kormos, A Korzenev, K Koseki, Y Koshio, Y Kouzuma, K Kowalik, V Kravtsov, I Kreslo, W Kropp, H Kubo, Y Kudenko, N Kulkarni, R Kurjata, T Kutter, J Lagoda, K Laihem, M Laveder, KP Lee, PT Le, JM Levy, C Licciardi, IT Lim, T Lindner, RP Litchfield, M Litos, A Longhin, GD Lopez, PF Loverre, L Ludovici, T Lux, M Macaire, K Mahn, Y Makida, M Malek, S Manly, A Marchionni, AD Marino, J Marteau, JF Martin, T Maruyama, T Maryon, J Marzec, P Masliah, EL Mathie, C Matsumura, K Matsuoka, V Matveev, K Mavrokoridis, E Mazzucato, N McCauley, KS McFarland, C McGrew, T McLachlan, M Messina, W Metcalf, C Metelko, M Mezzetto, P Mijakowski, CA Miller, A Minamino, O Mineev, S Mine, AD Missert, G Mituka, M Miura, K Mizouchi, L Monfregola, F Moreau, B Morgan, S Moriyama, A Muir, A Murakami, M Murdoch, S Murphy, J Myslik, T Nakadaira, M Nakahata, T Nakai, K Nakajima, T Nakamoto, K Nakamura, S Nakayama, T Nakaya, D Naples, ML Navin, B Nelson, TC Nicholls, K Nishikawa, H Nishino, JA Nowak, M Noy, Y Obayashi, T Ogitsu, H Ohhata, T Okamura, K Okumura, T Okusawa, SM Oser, M Otani, RA Owen, Y Oyama, T Ozaki, MY Pac, V Palladino, V Paolone, P Paul, D Payne, GF Pearce, JD Perkin, V Pettinacci, F Pierre, E Poplawska, B Popov, M Posiadala, J-M Poutissou, R Poutissou, P Przewlocki, W Qian, JL Raaf, E Radicioni, PN Ratoff, TM Raufer, M Ravonel, M Raymond, F Retiere, A Robert, PA Rodrigues, E Rondio, JM Roney, B Rossi, S Roth, A Rubbia, D Ruterbories, S Sabouri, R Sacco, K Sakashita, F Sanchez, A Sarrat, K Sasaki, K Scholberg, J Schwehr, M Scott, DI Scully, Y Seiya, T Sekiguchi, H Sekiya, M Shibata, Y Shimizu, M Shiozawa, S Short, M Syiad, RJ Smith, M Smy, JT Sobczyk, H Sobel, M Sorel, A Stahl, P Stamoulis, J Steinmann, B Still, J Stone, C Strabel, LR Sulak, R Sulej, P Sutcliffe, A Suzuki, K Suzuki, S Suzuki, SY Suzuki, Y Suzuki, Y Suzuki, T Szeglowski, M Szeptycka, R Tacik, M Tada, S Takahashi, A Takeda, Y Takenaga, Y Takeuchi, K Tanaka, HA Tanaka, M Tanaka, MM Tanaka, N Tanimoto, K Tashiro, I Taylor, A Terashima, D Terhorst, R Terri, LF Thompson, A Thorley, W Toki, T Tomaru, Y Totsuka, C Touramanis, T Tsukamoto, M Tzanov, Y Uchida, K Ueno, A Vacheret, M Vagins, G Vasseur, T Wachala, JJ Walding, AV Waldron, CW Walter, PJ Wanderer, J Wang, MA Ward, GP Ward, D Wark, MO Wascko, A Weber, R Wendell, N West, LH Whitehead, G Wikstrom, RJ Wilkes, MJ Wilking, JR Wilson, RJ Wilson, T Wongjirad, S Yamada, Y Yamada, A Yamamoto, K Yamamoto, Y Yamanoi, H Yamaoka, C Yanagisawa, T Yano, S Yen, N Yershov, M Yokoyama, A Zalewska, J Zalipska, L Zambelli, K Zaremba, M Ziembicki, ED Zimmerman, M Zito, J Zmuda

The T2K experiment observes indications of $\nu_\mu\rightarrow \nu_e$ appearance in data accumulated with $1.43\times10^{20}$ protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with $|\Delta m_{23}^2|=2.4\times10^{-3}$ eV$^2$, $\sin^2 2\theta_{23}=1$ and $\sin^2 2\theta_{13}=0$, the expected number of such events is 1.5$\pm$0.3(syst.). Under this hypothesis, the probability to observe six or more candidate events is 7$\times10^{-3}$, equivalent to 2.5$\sigma$ significance. At 90% C.L., the data are consistent with 0.03(0.04)$<\sin^2 2\theta_{13}<$ 0.28(0.34) for $\delta_{\rm CP}=0$ and a normal (inverted) hierarchy.


Characterization and simulation of the response of Multi-Pixel Photon Counters to low light levels

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2011)

A Vacheret, GJ Barker, M Dziewiecki, P Guzowski, MD Haigh, B Hartfiel, A Izmaylov, W Johnston, M Khabibullin, A Khotjantsev, Y Kudenko, R Kurjata, T Kutter, T Lindner, P Masliah, J Marzec, O Mineev, Y Musienko, S Oser, F Retière, RO Salih, A Shaikhiev, LF Thompson, MA Ward, RJ Wilson, N Yershov, K Zaremba, M Ziembicki


Improved Search for Muon-Neutrino to Electron-Neutrino Oscillations in MINOS

PHYSICAL REVIEW LETTERS 107 (2011) ARTN 181802

P Adamson, DJ Auty, DS Ayres, C Backhouse, G Barr, M Betancourt, M Bishai, A Blake, GJ Bock, DJ Boehnlein, D Bogert, SV Cao, S Cavanaugh, D Cherdack, S Childress, JAB Coelho, L Corwin, D Cronin-Hennessy, IZ Danko, JK de Jong, NE Devenish, MV Diwan, M Dorman, CO Escobar, J Evans, E Falk, GJ Feldman, MV Frohne, HR Gallagher, RA Gomes, MC Goodman, P Gouffon, N Graf, R Gran, K Grzelak, A Habig, J Hartnell, R Hatcher, A Himmel, A Holin, X Huang, J Hylen, GM Irwin, Z Isvan, DE Jaffe, C James, D Jensen, T Kafka, SMS Kasahara, G Koizumi, S Kopp, M Kordosky, A Kreymer, K Lang, G Lefeuvre, J Ling, PJ Litchfield, L Loiacono, P Lucas, WA Mann, ML Marshak, M Mathis, N Mayer, AM McGowan, R Mehdiyev, JR Meier, MD Messier, DG Michael, WH Miller, SR Mishra, J Mitchell, CD Moore, L Mualem, S Mufson, J Musser, D Naples, JK Nelson, HB Newman, RJ Nichol, JA Nowak, JP Ochoa-Ricoux, WP Oliver, M Orchanian, J Paley, RB Patterson, G Pawloski, GF Pearce, S Phan-Budd, RK Plunkett, X Qiu, J Ratchford, B Rebel, C Rosenfeld, HA Rubin, MC Sanchez, J Schneps, A Schreckenberger, P Schreiner, P Shanahan, R Sharma, A Sousa, N Tagg, RL Talaga, J Thomas, MA Thomson, R Toner, D Torretta, G Tzanakos, J Urheim, P Vahle, B Viren, JJ Walding, A Weber, RC Webb, C White, L Whitehead, SG Wojcicki, T Yang, R Zwaska


The T2K Experiment

ArXiv (2011)

T Collaboration, N Abgrall, H Aihara, Y Ajima, JB Albert, D Allan, P-A Amaudruz, C Andreopoulos, B Andrieu, MD Anerella, C Angelsen, S Aoki, O Araoka, J Argyriades, A Ariga, T Ariga, S Assylbekov, JPAMD André, D Autiero, A Badertscher, O Ballester, M Barbi, GJ Barker, P Baron, G Barr, L Bartoszek, M Batkiewicz, F Bay, S Bentham, V Berardi, BE Berger, H Berns, I Bertram, M Besnier, J Beucher, D Beznosko, S Bhadra, P Birney, D Bishop, E Blackmore, FDM Blaszczyk, J Blocki, A Blondel, A Bodek, C Bojechko, J Bouchez, T Boussuge, SB Boyd, M Boyer, N Braam, R Bradford, A Bravar, K Briggs, JD Brinson, C Bronner, DG Brook-Roberge, M Bryant, N Buchanan, H Budd, M Cadabeschi, RG Calland, D Calvet, JC Rodríguez, J Carroll, SL Cartwright, A Carver, R Castillo, MG Catanesi, C Cavata, A Cazes, A Cervera, JP Charrier, C Chavez, S Choi, S Chollet, G Christodoulou, P Colas, J Coleman, W Coleman, G Collazuol, K Connolly, P Cooke, A Curioni, A Dabrowska, I Danko, R Das, GS Davies, S Davis, M Day, XDL Broise, PD Perio, GD Rosa, T Dealtry, A Debraine, E Delagnes, A Delbart, C Densham, FD Lodovico, SD Luise, PD Tran, J Dobson, J Doornbos, U Dore, O Drapier, F Druillole, F Dufour, J Dumarchez, T Durkin, S Dytman, M Dziewiecki, M Dziomba, B Ellison, S Emery, A Ereditato, JE Escallier, L Escudero, LS Esposito, W Faszer, M Fechner, A Ferrero, A Finch, C Fisher, M Fitton, R Flight, D Forbush, E Frank, K Fransham, Y Fujii, Y Fukuda, M Gallop, V Galymov, GL Ganetis, FC Gannaway, A Gaudin, J Gaweda, A Gendotti, M George, S Giffin, C Giganti, K Gilje, I Giomataris, J Giraud, AK Ghosh, T Golan, M Goldhaber, JJ Gomez-Cadenas, S Gomi, M Gonin, M Goyette, A Grant, N Grant, F Grañena, S Greenwood, P Gumplinger, P Guzowski, MD Haigh, K Hamano, C Hansen, T Hara, PF Harrison, B Hartfiel, M Hartz, T Haruyama, R Hasanen, T Hasegawa, NC Hastings, S Hastings, A Hatzikoutelis, K Hayashi, Y Hayato, TDJ Haycock, C Hearty, RL Helmer, R Henderson, S Herlant, N Higashi, J Hignight, K Hiraide, E Hirose, J Holeczek, N Honkanen, S Horikawa, A Hyndman, AK Ichikawa, K Ieki, M Ieva, M Iida, M Ikeda, J Ilic, J Imber, T Ishida, C Ishihara, T Ishii, SJ Ives, M Iwasaki, K Iyogi, A Izmaylov, B Jamieson, RA Johnson, KK Joo, G Jover-Manas, CK Jung, H Kaji, T Kajita, H Kakuno, J Kameda, K Kaneyuki, D Karlen, K Kasami, V Kasey, I Kato, H Kawamuko, E Kearns, L Kellet, M Khabibullin, M Khaleeq, N Khan, A Khotjantsev, D Kielczewska, T Kikawa, JY Kim, S-B Kim, N Kimura, B Kirby, J Kisiel, P Kitching, T Kobayashi, G Kogan, S Koike, T Komorowski, A Konaka, LL Kormos, A Korzenev, K Koseki, Y Koshio, Y Kouzuma, K Kowalik, V Kravtsov, I Kreslo, W Kropp, H Kubo, J Kubota, Y Kudenko, N Kulkarni, L Kurchaninov, Y Kurimoto, R Kurjata, Y Kurosawa, T Kutter, J Lagoda, K Laihem, R Langstaff, M Laveder, TB Lawson, PT Le, AL Coguie, ML Ross, KP Lee, M Lenckowski, C Licciardi, IT Lim, T Lindner, RP Litchfield, A Longhin, GD Lopez, P Lu, L Ludovici, T Lux, M Macaire, L Magaletti, K Mahn, Y Makida, CJ Malafis, M Malek, S Manly, A Marchionni, C Mark, AD Marino, AJ Marone, J Marteau, JF Martin, T Maruyama, T Maryon, J Marzec, P Masliah, EL Mathie, C Matsumura, K Matsuoka, V Matveev, K Mavrokoridis, E Mazzucato, N McCauley, KS McFarland, C McGrew, T McLachlan, I Mercer, M Messina, W Metcalf, C Metelko, M Mezzetto, P Mijakowski, CA Miller, A Minamino, O Mineev, S Mine, RE Minvielle, G Mituka, M Miura, K Mizouchi, J-P Mols, L Monfregola, E Monmarthe, F Moreau, B Morgan, S Moriyama, D Morris, A Muir, A Murakami, JF Muratore, M Murdoch, S Murphy, J Myslik, G Nagashima, T Nakadaira, M Nakahata, T Nakamoto, K Nakamura, S Nakayama, T Nakaya, D Naples, B Nelson, TC Nicholls, K Nishikawa, H Nishino, K Nitta, F Nizery, JA Nowak, M Noy, Y Obayashi, T Ogitsu, H Ohhata, T Okamura, K Okumura, T Okusawa, C Ohlmann, K Olchanski, R Openshaw, SM Oser, M Otani, RA Owen, Y Oyama, T Ozaki, MY Pac, V Palladino, V Paolone, P Paul, D Payne, GF Pearce, C Pearson, JD Perkin, M Pfleger, F Pierre, D Pierrepont, P Plonski, P Poffenberger, E Poplawska, B Popov, M Posiadala, J-M Poutissou, R Poutissou, R Preece, P Przewlocki, W Qian, JL Raaf, E Radicioni, K Ramos, P Ratoff, TM Raufer, M Ravonel, M Raymond, F Retiere, D Richards, J-L Ritou, A Robert, PA Rodrigues, E Rondio, M Roney, M Rooney, D Ross, B Rossi, S Roth, A Rubbia, D Ruterbories, R Sacco, S Sadler, K Sakashita, F Sanchez, A Sarrat, K Sasaki, P Schaack, J Schmidt, K Scholberg, J Schwehr, M Scott, DI Scully, Y Seiya, T Sekiguchi, H Sekiya, G Sheffer, M Shibata, Y Shimizu, M Shiozawa, S Short, M Siyad, D Smith, RJ Smith, M Smy, J Sobczyk, H Sobel, S Sooriyakumaran, M Sorel, J Spitz, A Stahl, P Stamoulis, O Star, J Statter, L Stawnyczy, J Steinmann, J Steffens, B Still, M Stodulski, J Stone, C Strabel, T Strauss, R Sulej, P Sutcliffe, A Suzuki, K Suzuki, S Suzuki, SY Suzuki, Y Suzuki, Y Suzuki, J Swierblewski, T Szeglowski, M Szeptycka, R Tacik, M Tada, AS Tadepalli, M Taguchi, S Takahashi, A Takeda, Y Takenaga, Y Takeuchi, HA Tanaka, K Tanaka, M Tanaka, MM Tanaka, N Tanimoto, K Tashiro, IJ Taylor, A Terashima, D Terhorst, R Terri, LF Thompson, A Thorley, M Thorpe, W Toki, T Tomaru, Y Totsuka, C Touramanis, T Tsukamoto, V Tvaskis, M Tzanov, Y Uchida, K Ueno, M Usseglio, A Vacheret, M Vagins, JFV Schalkwyk, J-C Vanel, G Vasseur, O Veledar, P Vincent, T Wachala, AV Waldron, CW Walter, PJ Wanderer, MA Ward, GP Ward, D Wark, D Warner, MO Wascko, A Weber, R Wendell, J Wendland, N West, LH Whitehead, G Wikström, RJ Wilkes, MJ Wilking, Z Williamson, JR Wilson, RJ Wilson, K Wong, T Wongjirad, S Yamada, Y Yamada, A Yamamoto, K Yamamoto, Y Yamanoi, H Yamaoka, C Yanagisawa, T Yano, S Yen, N Yershov, M Yokoyama, A Zalewska, J Zalipska, K Zaremba, M Ziembicki, ED Zimmerman, M Zito, J Zmuda

The T2K experiment is a long-baseline neutrino oscillation experiment. Its main goal is to measure the last unknown lepton sector mixing angle {\theta}_{13} by observing {\nu}_e appearance in a {\nu}_{\mu} beam. It also aims to make a precision measurement of the known oscillation parameters, {\Delta}m^{2}_{23} and sin^{2} 2{\theta}_{23}, via {\nu}_{\mu} disappearance studies. Other goals of the experiment include various neutrino cross section measurements and sterile neutrino searches. The experiment uses an intense proton beam generated by the J-PARC accelerator in Tokai, Japan, and is composed of a neutrino beamline, a near detector complex (ND280), and a far detector (Super-Kamiokande) located 295 km away from J-PARC. This paper provides a comprehensive review of the instrumentation aspect of the T2K experiment and a summary of the vital information for each subsystem.


The T2K experiment

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2011)

K Abe, N Abgrall, H Aihara, Y Ajima, JB Albert, D Allan, P-A Amaudruz, C Andreopoulos, B Andrieu, MD Anerella, C Angelsen, S Aoki, O Araoka, J Argyriades, A Ariga, T Ariga, S Assylbekov, JPAM de André, D Autiero, A Badertscher, O Ballester, M Barbi, GJ Barker, P Baron, G Barr, L Bartoszek, M Batkiewicz, F Bay, S Bentham, V Berardi, BE Berger, H Berns, I Bertram, M Besnier, J Beucher, D Beznosko, S Bhadra, P Birney, D Bishop, E Blackmore, FDM Blaszczyk, J Blocki, A Blondel, A Bodek, C Bojechko, J Bouchez, T Boussuge, SB Boyd, M Boyer, N Braam, R Bradford, A Bravar, K Briggs, JD Brinson, C Bronner, DG Brook-Roberge, M Bryant, N Buchanan, H Budd, M Cadabeschi, RG Calland, D Calvet, J Caravaca Rodríguez, J Carroll, SL Cartwright, A Carver, R Castillo, MG Catanesi, C Cavata, A Cazes, A Cervera, JP Charrier, C Chavez, S Choi, S Chollet, G Christodoulou, P Colas, J Coleman, W Coleman, G Collazuol, K Connolly, P Cooke, A Curioni, A Dabrowska, I Danko, R Das, GS Davies, S Davis, M Day, X De La Broise, P de Perio, G De Rosa, T Dealtry, A Debraine, E Delagnes, A Delbart, C Densham, F Di Lodovico, S Di Luise, P Dinh Tran, J Dobson, J Doornbos, U Dore, O Drapier, F Druillole, F Dufour, J Dumarchez, T Durkin, S Dytman, M Dziewiecki, M Dziomba, B Ellison, S Emery, A Ereditato, JE Escallier, L Escudero, LS Esposito, W Faszer, M Fechner, A Ferrero, A Finch, C Fisher, M Fitton, R Flight, D Forbush, E Frank, K Fransham, Y Fujii, Y Fukuda, M Gallop, V Galymov, GL Ganetis, FC Gannaway, A Gaudin, J Gaweda, A Gendotti, M George, S Giffin, C Giganti, K Gilje, I Giomataris, J Giraud, AK Ghosh, T Golan, M Goldhaber, JJ Gomez-Cadenas, S Gomi, M Gonin, M Goyette, A Grant, N Grant, F Grañena, S Greenwood, P Gumplinger, P Guzowski, MD Haigh, K Hamano, C Hansen, T Hara, PF Harrison, B Hartfiel, M Hartz, T Haruyama, R Hasanen, T Hasegawa, NC Hastings, S Hastings, A Hatzikoutelis, K Hayashi, Y Hayato, TDJ Haycock, C Hearty, RL Helmer, R Henderson, S Herlant, N Higashi, J Hignight, K Hiraide, E Hirose, J Holeczek, N Honkanen, S Horikawa, A Hyndman, AK Ichikawa, K Ieki, M Ieva, M Iida, M Ikeda, J Ilic, J Imber, T Ishida, C Ishihara, T Ishii, SJ Ives, M Iwasaki, K Iyogi, A Izmaylov, B Jamieson, RA Johnson, KK Joo, G Jover-Manas, CK Jung, H Kaji, T Kajita, H Kakuno, J Kameda, K Kaneyuki, D Karlen, K Kasami, V Kasey, I Kato, H Kawamuko, E Kearns, L Kellet, M Khabibullin, M Khaleeq, N Khan, A Khotjantsev, D Kielczewska, T Kikawa, JY Kim, S-B Kim, N Kimura, B Kirby, J Kisiel, P Kitching, T Kobayashi, G Kogan, S Koike, T Komorowski, A Konaka, LL Kormos, A Korzenev, K Koseki, Y Koshio, Y Kouzuma, K Kowalik, V Kravtsov, I Kreslo, W Kropp, H Kubo, J Kubota, Y Kudenko, N Kulkarni, L Kurchaninov, Y Kurimoto, R Kurjata, Y Kurosawa, T Kutter, J Lagoda, K Laihem, R Langstaff, M Laveder, TB Lawson, PT Le, A Le Coguie, M Le Ross, KP Lee, M Lenckowski, C Licciardi, IT Lim, T Lindner, RP Litchfield, A Longhin, GD Lopez, P Lu, L Ludovici, T Lux, M Macaire, L Magaletti, K Mahn, Y Makida, CJ Malafis, M Malek, S Manly, A Marchionni, C Mark, AD Marino, AJ Marone, J Marteau, JF Martin, T Maruyama, T Maryon, J Marzec, P Masliah, EL Mathie, C Matsumura, K Matsuoka, V Matveev, K Mavrokoridis, E Mazzucato, N McCauley, KS McFarland, C McGrew, T McLachlan, I Mercer, M Messina, W Metcalf, C Metelko, M Mezzetto, P Mijakowski, CA Miller, A Minamino, O Mineev, S Mine, RE Minvielle, G Mituka, M Miura, K Mizouchi, J-P Mols, L Monfregola, E Monmarthe, F Moreau, B Morgan, S Moriyama, D Morris, A Muir, A Murakami, JF Muratore, M Murdoch, S Murphy, J Myslik, G Nagashima, T Nakadaira, M Nakahata, T Nakamoto, K Nakamura, S Nakayama, T Nakaya, D Naples, B Nelson, TC Nicholls, K Nishikawa, H Nishino, K Nitta, F Nizery, JA Nowak, M Noy, Y Obayashi, T Ogitsu, H Ohhata, T Okamura, K Okumura, T Okusawa, C Ohlmann, K Olchanski, R Openshaw, SM Oser, M Otani, RA Owen, Y Oyama, T Ozaki, MY Pac, V Palladino, V Paolone, P Paul, D Payne, GF Pearce, C Pearson, JD Perkin, M Pfleger, F Pierre, D Pierrepont, P Plonski, P Poffenberger, E Poplawska, B Popov, M Posiadala, J-M Poutissou, R Poutissou, R Preece, P Przewlocki, W Qian, JL Raaf, E Radicioni, K Ramos, P Ratoff, TM Raufer, M Ravonel, M Raymond, F Retiere, D Richards, J-L Ritou, A Robert, PA Rodrigues, E Rondio, M Roney, M Rooney, D Ross, B Rossi, S Roth, A Rubbia, D Ruterbories, R Sacco, S Sadler, K Sakashita, F Sanchez, A Sarrat, K Sasaki, P Schaack, J Schmidt, K Scholberg, J Schwehr, M Scott, DI Scully, Y Seiya, T Sekiguchi, H Sekiya, G Sheffer, M Shibata, Y Shimizu, M Shiozawa, S Short, M Siyad, D Smith, RJ Smith, M Smy, J Sobczyk, H Sobel, S Sooriyakumaran, M Sorel, J Spitz, A Stahl, P Stamoulis, O Star, J Statter, L Stawnyczy, J Steinmann, J Steffens, B Still, M Stodulski, J Stone, C Strabel, T Strauss, R Sulej, P Sutcliffe, A Suzuki, K Suzuki, S Suzuki, SY Suzuki, Y Suzuki, Y Suzuki, J Swierblewski, T Szeglowski, M Szeptycka, R Tacik, M Tada, AS Tadepalli, M Taguchi, S Takahashi, A Takeda, Y Takenaga, Y Takeuchi, HA Tanaka, K Tanaka, M Tanaka, MM Tanaka, N Tanimoto, K Tashiro, IJ Taylor, A Terashima, D Terhorst, R Terri, LF Thompson, A Thorley, M Thorpe, W Toki, T Tomaru, Y Totsuka, C Touramanis, T Tsukamoto, V Tvaskis, M Tzanov, Y Uchida, K Ueno, M Usseglio, A Vacheret, M Vagins, JF Van Schalkwyk, J-C Vanel, G Vasseur, O Veledar, P Vincent, T Wachala, AV Waldron, CW Walter, PJ Wanderer, MA Ward, GP Ward, D Wark, D Warner, MO Wascko, A Weber, R Wendell, J Wendland, N West, LH Whitehead, G Wikström, RJ Wilkes, MJ Wilking, Z Williamson, JR Wilson, RJ Wilson, K Wong, T Wongjirad, S Yamada, Y Yamada, A Yamamoto, K Yamamoto, Y Yamanoi, H Yamaoka, C Yanagisawa, T Yano, S Yen, N Yershov, M Yokoyama, A Zalewska, J Zalipska, K Zaremba, M Ziembicki, ED Zimmerman, M Zito, J Zmuda


The T2K near detector data acquisition systems

IEEE Transactions on Nuclear Science 58 (2011) 1800-1806

M Thorpe, C Angelsen, G Barr, C Metelko, T Nicholls, G Pearce, N West

T2K is a second generation long-baseline experiment in Japan, designed to perform precision studies of neutrino oscillations. A neutrino beam originating at the J-PARC facility is sampled by two near detectors, approximately 280 m distant from the source and directed towards the Kamioka underground facility, 295 km distant, where the Super-Kamiokande water Cerenkov detector is situated. Both the on-axis (INGRID) and off-axis (ND280) near detectors employ the MIDAS framework for their data acquisition systems. Events are selected via a flexible hardware trigger, which allows mixed operating modes incorporating beam spill, cosmic and calibration triggers. Data are acquired from the front-end electronics over optical Gigabit Ethernet links by custom MIDAS front-end applications distributed over a cluster of Linux computers. Event fragments from all sub-detectors are merged and logged on a central backend processor and then copied to remote storage for long-term archival. The system is also designed to allow flexible partitioning of sub-detectors for standalone diagnostics and calibration. We present the design of the DAQ system and report on experience gathered during early operation of the near detectors. © 2006 IEEE.


Measurement of the underground atmospheric muon charge ratio using the MINOS near detector

Physical Review D - Particles, Fields, Gravitation and Cosmology 83 (2011)

P Adamson, C Andreopoulos, DJ Auty, DS Ayres, C Backhouse, G Barr, WL Barrett, P Bhattarai, M Bishai, A Blake, GJ Bock, DJ Boehnlein, D Bogert, S Budd, S Cavanaugh, D Cherdack, S Childress, BC Choudhary, BC Choudhary, JAB Coelho, SJ Coleman, L Corwin, D Cronin-Hennessy, D Damiani, D Damiani, IZ Danko, JK De Jong, JK De Jong, NE Devenish, MV Diwan, M Dorman, CO Escobar, JJ Evans, E Falk, GJ Feldman, TH Fields, MV Frohne, MV Frohne, HR Gallagher, RA Gomes, MC Goodman, P Gouffon, N Graf, R Gran, N Grant, K Grzelak, A Habig, D Harris, PG Harris, J Hartnell, J Hartnell, R Hatcher, A Himmel, A Holin, X Huang, J Hylen, J Ilic, GM Irwin, Z Isvan, DE Jaffe, C James, D Jensen, T Kafka, SMS Kasahara, G Koizumi, S Kopp, M Kordosky, Z Krahn, A Kreymer, K Lang, G Lefeuvre, J Ling, J Ling, PJ Litchfield, L Loiacono, P Lucas, WA Mann, ML Marshak, N Mayer, AM McGowan, AM McGowan, R Mehdiyev, JR Meier, MD Messier, DG Michael, WH Miller, SR Mishra, J Mitchell, CD Moore, J Morfín, L Mualem, S Mufson, J Musser, D Naples, JK Nelson, HB Newman, RJ Nichol, JA Nowak, WP Oliver, M Orchanian

The magnetized MINOS Near Detector, at a depth of 225 mwe, is used to measure the atmospheric muon charge ratio. The ratio of observed positive to negative atmospheric muon rates, using 301 days of data, is measured to be 1.266±0.001(stat)-0.014+0.015(syst). This measurement is consistent with previous results from other shallow underground detectors and is 0.108±0.019(stat+syst) lower than the measurement at the functionally identical MINOS Far Detector at a depth of 2070 mwe. This increase in charge ratio as a function of depth is consistent with an increase in the fraction of muons arising from kaon decay for increasing muon surface energies. © 2011 American Physical Society.


Observation in the MINOS far detector of the shadowing of cosmic rays by the sun and moon

Astroparticle Physics 34 (2011) 457-466

P Adamson, C Andreopoulos, C Andreopoulos, DS Ayres, C Backhouse, G Barr, WL Barrett, M Bishai, A Blake, B Bock, GJ Bock, DJ Boehnlein, D Bogert, C Bower, S Budd, S Cavanaugh, D Cherdack, S Childress, BC Choudhary, BC Choudhary, BC Choudhary, JH Cobb, JAB Coelho, SJ Coleman, L Corwin, D Cronin-Hennessy, IZ Danko, JK De Jong, JK De Jong, NE Devenish, MV Diwan, M Dorman, CO Escobar, JJ Evans, E Falk, GJ Feldman, MV Frohne, MV Frohne, HR Gallagher, A Godley, RA Gomes, MC Goodman, P Gouffon, R Gran, N Grant, EW Grashorn, EW Grashorn, K Grzelak, K Grzelak, A Habig, D Harris, PG Harris, J Hartnell, J Hartnell, R Hatcher, A Himmel, A Holin, X Huang, J Hylen, J Ilic, GM Irwin, Z Isvan, DE Jaffe, C James, D Jensen, T Kafka, SMS Kasahara, G Koizumi, S Kopp, M Kordosky, M Kordosky, Z Krahn, A Kreymer, K Lang, G Lefeuvre, J Ling, PJ Litchfield, RP Litchfield, L Loiacono, P Lucas, WA Mann, ML Marshak, JS Marshall, N Mayer, AM McGowan, AM McGowan, AM McGowan, R Mehdiyev, JR Meier, MD Messier, DG Michael, WH Miller, SR Mishra, J Mitchell, CD Moore, L Mualem, S Mufson, J Musser, D Naples, JK Nelson

The shadowing of cosmic ray primaries by the moon and sun was observed by the MINOS far detector at a depth of 2070 mwe using 83.54 million cosmic ray muons accumulated over 1857.91 live-days. The shadow of the moon was detected at the 5.6 σ level and the shadow of the sun at the 3.8 σ level using a log-likelihood search in celestial coordinates. The moon shadow was used to quantify the absolute astrophysical pointing of the detector to be 0.17 ± 0.12°. Hints of interplanetary magnetic field effects were observed in both the sun and moon shadow. © 2010 Elsevier B.V. All rights reserved.