Publications


Reconstruction and measurement of O(100) MeV energy electromagnetic activity from pi(0) -> gamma gamma decays in the MicroBooNE LArTPC

JOURNAL OF INSTRUMENTATION 15 (2020) ARTN P02007

C Adams, M Alrashed, R An, J Anthony, J Asaadi, A Ashkenazi, S Balasubramanian, B Baller, C Barnes, G Barr, V Basque, M Bass, F Bay, S Berkman, A Bhanderi, A Bhat, M Bishai, A Blake, T Bolton, L Camilleri, D Caratelli, IC Terrazas, R Carr, RC Fernandez, F Cavanna, G Cerati, Y Chen, E Church, D Cianci, EO Cohen, JM Conrad, M Convery, L Cooper-Troendle, JI Crespo-Anadon, M Del Tutto, D Devitt, A Diaz, L Domine, K Duffy, S Dytman, B Eberly, A Ereditato, LE Sanchez, J Esquivel, JJ Evans, RS Fitzpatrick, BT Fleminga, N Foppiani, D Franco, AP Furmanski, D Garcia-Gamez, S Gardiner, V Genty, D Goeldi, S Gollapinni, O Goodwin, E Gramellini, P Green, H Greenlee, R Grosso, L Gu, W Gu, R Guenette, P Guzowski, P Hamilton, O Hen, C Hill, GA Horton-Smith, A Hourlier, E-C Huang, R Itay, C James, JJ de Vries, X Ji, L Jiang, JH Jo, RA Johnson, J Joshi, Y-J Jwa, G Karagiorgi, W Ketchum, B Kirby, M Kirby, T Kobilarcik, I Kreslo, I Lepetic, Y Li, A Lister, BR Littlejohn, S Lockwitz, D Lorca, WC Louis, M Luethi, B Lundberg, X Luo, A Marchionni, S Marcocci, C Mariani, J Marshall, J Martin-Albo, DAM Caicedo, K Mason, A Mastbaum, N McConkey, V Meddage, T Mettler, K Miller, J Mills, K Mistry, A Mogan, T Mohayai, J Moon, M Mooney, CD Moore, J Mousseau, M Murphy, R Murrells, D Naples, RK Neely, P Nienaber, J Nowak, O Palamara, V Pandey, V Paolone, A Papadopoulou, V Papavassiliou, SF Pate, A Paudel, Z Pavlovic, E Piasetzky, D Porzio, S Prince, G Pulliam, X Qian, JL Raaf, A Rafique, L Ren, L Rochester, HE Rogers, M Ross-Lonergan, CR von Rohr, B Russell, G Scanavini, DW Schmitz, A Schukraft, W Seligman, MH Shaevitz, R Sharankova, J Sinclair, A Smith, EL Snider, M Soderberg, S Soldner-Rembold, SR Soleti, P Spentzouris, J Spitz, M Stancari, J St John, T Strauss, K Sutton, S Sword-Fehlberg, AM Szelc, N Tagg, W Tang, K Terao, RT Thornton, M Toups, Y-T Tsai, S Tufanli, T Usher, W Van De Pontseele, RG Van de Water, B Viren, M Weber, H Wei, DA Wickremasinghe, Z Williams, S Wolbers, T Wongjirad, K Woodruff, M Wospakrik, W Wu, T Yang, G Yarbrough, LE Yates, GP Zeller, J Zennamo, C Zhang, M Collaboration


Search for electron antineutrino appearance in a long-baseline muon antineutrino beam

Physical Review Letters American Physical Society 124 (2020) 161802

K Abe, R Akutsu, A Ali, A Rychter, K Sakashita, F Sanchez, K Scholberg, J Schwehr, M Scott, Y Seiya, T Sekiguchi, D Sgalaberna, A Smirnov, JT Sobczyk, C Touramanis, W Uno, M Vagins, S Valder, RJ Wilson, K Wood, C Wret, Y Yamada, M Zito, S Zsoldos, A Zykova

Electron antineutrino appearance is measured by the T2K experiment in an accelerator-produced antineutrino beam, using additional neutrino beam operation to constrain parameters of the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) mixing matrix. T2K observes 15 candidate electron antineutrino events with a background expectation of 9.3 events. Including information from the kinematic distribution of observed events, the hypothesis of no electron antineutrino appearance is disfavored with a significance of 2.40σ and no discrepancy between data and PMNS predictions is found. A complementary analysis that introduces an additional free parameter which allows non-PMNS values of electron neutrino and antineutrino appearance also finds no discrepancy between data and PMNS predictions.


Neutrino-hydrogen interactions with a high-pressure time projection chamber

Physical Review D 102 (2020)

P Hamacher-Baumann, X Lu, J Martín-Albo

© 2020 American Physical Society. We investigate the idea of detecting pure neutrino-hydrogen interactions in a multinuclear target using the transverse kinematic imbalance technique [Lu et al., Phys. Rev. D 92, 051302 (2015)PRVDAQ1550-799810.1103/PhysRevD.92.051302] in a high-pressure time projection chamber (HPTPC). With full solid-angle acceptance, MeV-level proton tracking threshold, state-of-the-art tracking resolution, and an O(100 m3) gas volume at 10 bar, an HPTPC could provide an opportunity to realize this technique. We propose the use of hydrogen-rich gases in the TPC to achieve high detection purity with a large hydrogen mass. With the projected neutrino beam exposure at the DUNE experiment, neutrino-hydrogen events of the order of 104 per year with purity above 90% could be achieved with such an HPTPC using methane gas. In this paper, we present a systematic study of the event rate and purity for a variety of argon-alkane mixtures, and examine these gas candidates for the TPC tracking-related properties.


First measurement of the charged current (nu)over-bar(mu) double differential cross section on a water target without( )pions in the final state

PHYSICAL REVIEW D 102 (2020) 12007

A Ali, C Alt, C Andreopoulos, L Anthony, M Antonova, S Aoki, A Ariga, Y Ashida, E Atkin, Y Awataguchi, S Ban, M Barbi, G Barker, G Barr, C Barry, M Batkiewicz-Kwasniak, A Beloshapkin, F Bench, V Berardi, S Berkman, L Berns, S Bhadra, S Bienstock, S Bolognesi, B Bourguille


Single pion production in electron-nucleon interactions

PHYSICAL REVIEW D 102 (2020) ARTN 053009

M Kabirnezhad


Design and performance of a 35-ton liquid argon time projection chamber as a prototype for future very large detectors

JOURNAL OF INSTRUMENTATION 15 (2020) ARTN P03035

DL Adams, M Baird, G Barr, N Barros, A Blake, E Blaufuss, A Booth, D Brailsford, N Buchanan, B Carls, H Chen, M Convery, G De Geronimo, T Dealtry, R Dharmapalan, Z Djurcic, J Fowler, S Glavin, RA Gomes, MC Goodman, M Graham, L Greenler, A Hahn, J Hartnell, R Herbst, A Higuera, A Himmel, J Insler, J Jacobsen, T Junk, B Kirby, J Klein, VA Kudryavtsev, T Kutter, Y Li, X Li, S Lin, N McConkey, CA Moura, S Mufson, N Nambiar, J Nowak, M Nunes, R Paulos, X Qian, O Rodrigues, W Sands, G Santucci, R Sharma, G Sinev, NJC Spooner, I Stancu, D Stefan, J Stewart, J Stock, T Strauss, R Sulej, Y Sun, M Thiesse, LF Thompson, YT Tsai, R Van Berg, T Vieira, M Wallbank, H Wang, Y Wang, TK Warburton, D Wenman, D Whittington, RJ Wilson, M Worcester, T Yang, B Yu, C Zhang


Simultaneous measurement of the muon neutrino charged-current cross section on oxygen and carbon without pions in the final state at T2K

PHYSICAL REVIEW D 101 (2020) ARTN 112004

K Abe, N Akhlaq, R Akutsu, A Ali, C Alt, C Andreopoulos, L Anthony, M Antonova, S Aoki, A Ariga, T Arihara, Y Asada, Y Ashida, ET Atkin, Y Awataguchi, S Ban, M Barbi, GJ Barker, G Barr, D Barrow, M Batkiewicz-Kwasniak, A Beloshapkin, F Bench, V Berardi, L Berns, S Bhadra, S Bienstock, S Bolognesi, T Bonus, B Bourguille, SB Boyd, A Bravar, D Bravo Berguno, C Bronner, S Bron, A Bubak, MB Avanzini, T Campbell, S Cao, SL Cartwright, MG Catanesi, A Cervera, D Cherdack, N Chikuma, G Christodoulou, M Cicerchia, J Coleman, G Collazuol, L Cook, D Coplowe, A Cudd, A Dabrowska, G De Rosa, T Dealtry, SR Dennis, C Densham, F Di Lodovico, N Dokania, S Dolan, TA Doyle, O Drapier, J Dumarchez, P Dunne, A Eguchi, L Eklund, S Emery-Schrenk, A Ereditato, AJ Finch, G Fiorillo, C Francois, M Friend, Y Fujii, R Fujita, D Fukuda, R Fukuda, Y Fukuda, K Fusshoeller, C Giganti, M Gonin, A Gorin, M Guigue, DR Hadley, JT Haigh, P Hamacher-Baumann, M Hartz, T Hasegawa, S Hassani, NC Hastings, Y Hayato, A Hiramoto, M Hogan, J Holeczek, NTH Van, T Honjo, F Iacob, AK Ichikawa, M Ikeda, T Ishida, M Ishitsuka, K Iwamoto, A Izmaylov, N Izumi, M Jakkapu, B Jamieson, SJ Jenkins, C Jesus-Valls, M Jiang, P Jonsson, CK Jung, X Junjie, PB Jurj, M Kabirnezhad, AC Kaboth, T Kajita, H Kakuno, J Kameda, D Karlen, SP Kasetti, Y Kataoka, Y Katayama, T Katori, Y Kato, E Kearns, M Khabibullin, A Khotjantsev, T Kikawa, H Kikutani, H Kim, S King, J Kisiel, A Knight, T Kobata, T Kobayashi, L Koch, T Koga, A Konaka, LL Kormos, Y Koshio, A Kostin, K Kowalik, H Kubo, Y Kudenko, N Kukita, S Kuribayashi, R Kurjata, T Kutter, M Kuze, L Labarga, J Lagoda, M Lamoureux, D Last, M Lawe, M Licciardi, RP Litchfield, SL Liu, X Li, A Longhin, L Ludovici, X Lu, T Lux, LN Machado, L Magaletti, K Mahn, M Malek, S Manly, L Maret, AD Marino, L Marti-Magro, T Maruyama, T Matsubara, K Matsushita, V Matveev, C Mauger, K Mavrokoridis, E Mazzucato, N McCauley, J McElwee, KS McFarland, C McGrew, A Mefodiev, C Metelko, M Mezzetto, A Minamino, O Mineev, S Mine, M Miura, LM Bueno, S Moriyama, TA Mueller, L Munteanu, S Murphy, Y Nagai, T Nakadaira, M Nakahata, Y Nakajima, A Nakamura, K Nakamura, S Nakayama, T Nakaya, K Nakayoshi, CER Naseby, TV Ngoc, K Niewczas, K Nishikawa, Y Nishimura, E Noah, TS Nonnenmacher, F Nova, P Novella, J Nowak, JC Nugent, HM O'Keeffe, L O'Sullivan, T Odagawa, T Ogawa, R Okada, K Okumura, T Okusawa, SM Oser, RA Owen, Y Oyama, V Palladino, V Paolone, M Pari, WC Parker, S Parsa, J Pasternak, M Pavin, D Payne, GC Penn, L Pickering, C Pidcott, G Pintaudi, C Pistillo, B Popov, K Porwit, M Posiadala-Zezula, A Pritchard, B Quilain, T Radermacher, E Radicioni, B Radics, PN Ratoff, C Riccio, E Rondio, S Roth, A Rubbia, AC Ruggeri, C Ruggles, A Rychter, K Sakashita, F Sanchez, G Santucci, CM Schloesser, K Scholberg, M Scott, Y Seiya, T Sekiguchi, H Sekiya, D Sgalaberna, A Shaikhiev, A Shaykina, M Shiozawa, W Shorrock, A Shvartsman, M Smy, JT Sobczyk, H Sobel, FJP Soler, Y Sonoda, S Suvorov, A Suzuki, SY Suzuki, Y Suzuki, AA Sztuc, M Tada, M Tajima, A Takeda, Y Takeuchi, HK Tanaka, HA Tanaka, S Tanaka, Y Tanihara, N Teshima, LF Thompson, W Toki, C Touramanis, T Towstego, KM Tsui, T Tsukamoto, M Tzanov, Y Uchida, M Vagins, S Valder, Z Vallari, D Vargas, G Vasseur, WGS Vinning, T Vladisavljevic, VV Volkov, T Wachala, J Walker, JG Walsh, Y Wang, D Wark, MO Wascko, A Weber, R Wendell, MJ Wilking, C Wilkinson, JR Wilson, K Wood, C Wret, K Yamamoto, C Yanagisawa, G Yang, T Yano, K Yasutome, N Yershov, M Yokoyama, T Yoshida, M Yu, A Zalewska, J Zalipska, K Zaremba, G Zarnecki, M Ziembicki, ED Zimmerman, M Zito, S Zsoldos, A Zykova, T Collaboration


Improved Constraints on Sterile Neutrino Mixing from Disappearance Searches in the MINOS, MINOS+, Daya Bay, and Bugey-3 Experiments.

Physical review letters 125 (2020) 71801

P Adamson, Z Cheng, J Cherwinka, S Childress, M Chu, A Chukanov, J Coelho, J Cummings, N Dash, S De Rijck, F Deng, Y Ding, M Diwan, T Dohnal, D Dolzhikov, J Dove, M Dvořák, D Dwyer, J Evans, G Feldman, W Flanagan, M Gabrielyan, J Gallo, S Germani, A Weber

Searches for electron antineutrino, muon neutrino, and muon antineutrino disappearance driven by sterile neutrino mixing have been carried out by the Daya Bay and MINOS+ collaborations. This Letter presents the combined results of these searches, along with exclusion results from the Bugey-3 reactor experiment, framed in a minimally extended four-neutrino scenario. Significantly improved constraints on the θ_{μe} mixing angle are derived that constitute the most constraining limits to date over five orders of magnitude in the mass-squared splitting Δm_{41}^{2}, excluding the 90% C.L. sterile-neutrino parameter space allowed by the LSND and MiniBooNE observations at 90% CL_{s} for Δm_{41}^{2}<13  eV^{2}. Furthermore, the LSND and MiniBooNE 99% C.L. allowed regions are excluded at 99% CL_{s} for Δm_{41}^{2}<1.6 eV^{2}.


Measurement of the muon neutrino charged-current single $π^+$ production on hydrocarbon using the T2K off-axis near detector ND280

Physical Review D: Particles, Fields, Gravitation and Cosmology American Physical Society (2020)

K Abe, R Akutsu, A Ali, C Alt, J Amey, C Andreopoulos, L Anthony, M Antonova, S Aoki, A Ariga, Y Ashida, ET Atkin, Y Awataguchi, Y Azuma, S Ban, M Barbi, GJ Barker, G Barr, C Barry, M Batkiewicz-Kwasniak, A Beloshapkin, F Bench, V Berardi, S Berkman, RM Berner, L Berns, S Bhadra, S Bienstock, A Blondel, S Bolognesi, S Bordoni, B Bourguille, SB Boyd, D Brailsford, A Bravar, C Bronner, MB Avanzini, J Calcutt, RG Calland, T Campbell, S Cao, SL Cartwright, R Castillo, MG Catanesi, A Cervera, A Chappell, C Checchia, D Cherdack, N Chikuma, G Christodoulou, J Coleman, G Collazuol, L Cook, D Coplowe, A Cudd, A Dabrowska, GD Rosa, T Dealtry, PF Denner, SR Dennis, C Densham, FD Lodovico, N Dokania, S Dolan, O Drapier, KE Duy, J Dumarchez, P Dunne, L Eklund, S Emery-Schrenk, A Ereditato, P Fernandez, T Feusels, AJ Finch, GA Fiorentini, G Fiorillo, C Francois, M Friend, Y Fujii, R Fujita, D Fukuda, R Fukuda, Y Fukuda, K Gameil, A Garcia, C Giganti, F Gizzarelli, T Golan, M Gonin, A Gorin, M Guigue, DR Hadley, L Haegel, JT Haigh, P Hamacher-Baumann, D Hansen, J Harada, M Hartz, T Hasegawa, NC Hastings, T Hayashino, Y Hayato, A Hillairet, T Hiraki, A Hiramoto, S Hirota, M Hogan, J Holeczek, NTH Van, F Hosomi, K Huang, F Iacob, AK Ichikawa, M Ikeda, J Imber, T Inoue, J Insler, RA Intonti, T Ishida, T Ishii, M Ishitsuka, E Iwai, K Iwamoto, A Izmaylov, B Jamieson, SJ Jenkins, C Jesus-Valls, M Jiang, S Johnson, P Jonsson, CK Jung, M Kabirnezhad, AC Kaboth, T Kajita, H Kakuno, J Kameda, D Karlen, Y Kataoka, T Katori, Y Kato, E Kearns, M Khabibullin, A Khotjantsev, H Kim, J Kim, S King, J Kisiel, A Knight, A Knox, T Kobayashi, L Koch, T Koga, PP Koller, A Konaka, LL Kormos, Y Koshio, K Kowalik, H Kubo, Y Kudenko, N Kukita, R Kurjata, T Kutter, M Kuze, L Labarga, J Lagoda, I Lamont, M Lamoureux, P Lasorak, M Laveder, M Lawe, M Licciardi, T Lindner, ZJ Liptak, RP Litcheld, SL Liu, X Li, A Longhin, JP Lopez, T Lou, L Ludovici, X Lu, T Lux, LN Machado, L Magaletti, K Mahn, M Malek, S Manly, L Maret, AD Marino, JF Martin, P Martins, S Martynenko, T Maruyama, T Matsubara, K Matsushita, V Matveev, K Mavrokoridis, WY Ma, E Mazzucato, M McCarthy, N McCauley, KS McFarland, C McGrew, A Mefodiev, C Metelko, M Mezzetto, A Minamino, O Mineev, S Mine, A Missert, M Miura, LM Bueno, S Moriyama, J Morrison, TA Mueller, L Munteanu, S Murphy, Y Nagai, T Nakadaira, M Nakahata, Y Nakajima, A Nakamura, KG Nakamura, K Nakamura, KD Nakamura, Y Nakanishi, S Nakayama, T Nakaya, K Nakayoshi, C Nantais, TV Ngoc, C Nielsen, K Niewczas, K Nishikawa, Y Nishimura, TS Nonnenmacher, F Nova, P Novella, J Nowak, JC Nugent, HM O'Keeffe, L O'Sullivan, K Okumura, T Okusawa, W Oryszczak, SMOT Ovsyannikova, RA Owen, Y Oyam, V Palladino, JL Palomino, V Paolone, WC Parker, ND Patel, P Paudyal, M Pavin, D Payne, GC Penn, YPL Pickering, C Pidcott, ESP Guerra, C Pistillo, BPK Porwit, M Posiadala-Zezula, JM Poutissou, A Pritchard, P Przewlocki, B Quilain, T Radermacher, E Radicioni, B Radics, PN Rato, MA Rayner, E Reinherz-Aronis, C Riccio, E Rondio, B Rossi, S Roth, A Rubbia, AC Ruggeri, A Rychter, K Sakashita, F Sanchez, S Sasaki, E Scantamburlo, CM Schloesser, K Scholberg, J Schwehr, M Scott, Y Seiya, T Sekiguchi, H Sekiya, D Sgalaberna, R Shah, A Shaikhiev, F Shaker, D Shaw, A Shaykina, M Shiozawa, T Shirahige, W Shorrock, A Shvartsman, A Smirnov, M Smy, JT Sobczyk, H Sobel, FJP Soler, Y Sonoda, J Steinmann, T Stewart, P Stowell, Y Suda, S Suvorov, A Suzuki, SY Suzuki, Y Suzuki, AA Sztuc, R Tacik, M Tada, A Takeda, Y Takeuchi, R Tamura, HK Tanaka, HA Tanaka, S Tanaka, T Thakore, LF Thompson, S Tobayama, W Toki, T Tomura, C Touramanis, KM Tsui, T Tsukamoto, M Tzanov, Y Uchida, W Uno, M Vagins, S Valder, Z Vallari, D Vargas, G Vasseur, C Vilela, WGS Vinning, T Vladisavljevic, VV Volkov, T Wachala, J Walker, JG Walsh, CW Walter, Y Wang, D Wark, MO Wascko, A Weber, R Wendell, MJ Wilking, C Wilkinson, JR Wilson, RJ Wilson, K Wood, C Wret, Y Yamada, K Yamamoto, S Yamasu, C Yanagisawa, G Yang, T Yano, K Yasutome, S Yen, N Yershov, M Yokoyama, T Yoshida, M Yu, A Zalewska, J Zalipska, L Zambelli, K Zaremba, G Zarnecki, M Ziembicki, ED Zimmerman, M Zito, S Zsoldos, A Zykova

We report the measurements of single and double differential cross section of muon neutrino charged-current interactions on carbon with a single positively charged pion in the final state at the T2K off-axis near detector using $5.56\times10^{20}$ protons on target. The analysis uses data control samples for the background subtraction and the cross section signal, defined as a single negatively charged muon and a single positively charged pion exiting from the target nucleus, is extracted using an unfolding method. The model dependent cross section, integrated over the T2K off-axis neutrino beam spectrum peaking at $0.6$~GeV, is measured to be $\sigma = (11.76 \pm 0.44 \text{(stat)} \pm 2.39 \text{(syst)}) \times 10^{-40} \text{cm}^2$~$\text{nucleon}^{-1}$. Various differential cross sections are measured, including the first measurement of the Adler angles for single charged pion production in neutrino interactions with heavy nuclei target.


Constraint on the Matter-Antimatter Symmetry-Violating Phase in Neutrino Oscillations

ArXiv (0)

K Abe, R Akutsu, A Ali, C Alt, C Andreopoulos, L Anthony, M Antonova, S Aoki, A Ariga, Y Asada, Y Ashida, ET Atkin, Y Awataguchi, S Ban, M Barbi, GJ Barker, G Barr, C Barry, M Batkiewicz-Kwasniak, A Beloshapkin, F Bench, V Berardi, S Berkman, L Berns, S Bhadra, S Bienstock, A Blondel, S Bolognesi, B Bourguille, SB Boyd, D Brailsford, A Bravar, DB Berguño, C Bronner, A Bubak, MB Avanzini, J Calcutt, T Campbell, S Cao, SL Cartwright, MG Catanesi, A Cervera, A Chappell, C Checchia, D Cherdack, N Chikuma, G Christodoulou, J Coleman, G Collazuol, L Cook, D Coplowe, A Cudd, A Dabrowska, GD Rosa, T Dealtry, PF Denner, SR Dennis, C Densham, FD Lodovico, N Dokania, S Dolan, O Drapier, J Dumarchez, P Dunne, L Eklund, S Emery-Schrenk, A Ereditato, P Fernandez, T Feusels, AJ Finch, GA Fiorentini, G Fiorillo, C Francois, M Friend, Y Fujii, R Fujita, D Fukuda, R Fukuda, Y Fukuda, K Gameil, C Giganti, T Golan, M Gonin, A Gorin, M Guigue, DR Hadley, JT Haigh, P Hamacher-Baumann, M Hartz, T Hasegawa, NC Hastings, T Hayashino, Y Hayato, A Hiramoto, M Hogan, J Holeczek, NTH Van, F Iacob, AK Ichikawa, M Ikeda, T Ishida, T Ishii, M Ishitsuka, K Iwamoto, A Izmaylov, B Jamieson, SJ Jenkins, C Jesús-Valls, M Jiang, S Johnson, P Jonsson, CK Jung, M Kabirnezhad, AC Kaboth, T Kajita, H Kakuno, J Kameda, D Karlen, SP Kasetti, Y Kataoka, T Katori, Y Kato, E Kearns, M Khabibullin, A Khotjantsev, T Kikawa, H Kim, J Kim, S King, J Kisiel, A Knight, A Knox, T Kobayashi, L Koch, T Koga, A Konaka, LL Kormos, Y Koshio, K Kowalik, H Kubo, Y Kudenko, N Kukita, S Kuribayashi, R Kurjata, T Kutter, M Kuze, L Labarga, J Lagoda, M Lamoureux, M Laveder, M Lawe, M Licciardi, T Lindner, RP Litchfield, SL Liu, X Li, A Longhin, L Ludovici, X Lu, T Lux, LN Machado, L Magaletti, K Mahn, M Malek, S Manly, L Maret, AD Marino, JF Martin, T Maruyama, T Matsubara, K Matsushita, V Matveev, K Mavrokoridis, E Mazzucato, M McCarthy, N McCauley, KS McFarland, C McGrew, A Mefodiev, C Metelko, M Mezzetto, A Minamino, O Mineev, S Mine, M Miura, LM Bueno, S Moriyama, J Morrison, TA Mueller, L Munteanu, S Murphy, Y Nagai, T Nakadaira, M Nakahata, Y Nakajima, A Nakamura, KG Nakamura, K Nakamura, S Nakayama, T Nakaya, K Nakayoshi, C Nantais, TV Ngoc, K Niewczas, K Nishikawa, Y Nishimura, TS Nonnenmacher, F Nova, P Novella, J Nowak, JC Nugent, HM O'Keeffe, L O'Sullivan, T Odagawa, K Okumura, T Okusawa, SM Oser, RA Owen, Y Oyama, V Palladino, JL Palomino, V Paolone, WC Parker, P Paudyal, M Pavin, D Payne, GC Penn, L Pickering, C Pidcott, G Pintaudi, ESP Guerra, C Pistillo, B Popov, K Porwit, M Posiadala-Zezula, A Pritchard, B Quilain, T Radermacher, E Radicioni, B Radics, PN Ratoff, E Reinherz-Aronis, C Riccio, E Rondio, S Roth, A Rubbia, AC Ruggeri, A Rychter, K Sakashita, F Sánchez, CM Schloesser, K Scholberg, J Schwehr, M Scott, Y Seiya, T Sekiguchi, H Sekiya, D Sgalaberna, R Shah, A Shaikhiev, F Shaker, A Shaykina, M Shiozawa, W Shorrock, A Shvartsman, A Smirnov, M Smy, JT Sobczyk, H Sobel, FJP Soler, Y Sonoda, J Steinmann, S Suvorov, A Suzuki, SY Suzuki, Y Suzuki, AA Sztuc, M Tada, M Tajima, A Takeda, Y Takeuchi, HK Tanaka, HA Tanaka, S Tanaka, LF Thompson, W Toki, C Touramanis, KM Tsui, T Tsukamoto, M Tzanov, Y Uchida, W Uno, M Vagins, S Valder, Z Vallari, D Vargas, G Vasseur, C Vilela, WGS Vinning, T Vladisavljevic, VV Volkov, T Wachala, J Walker, JG Walsh, Y Wang, D Wark, MO Wascko, A Weber, R Wendell, MJ Wilking, C Wilkinson, JR Wilson, RJ Wilson, K Wood, C Wret, Y Yamada, K Yamamoto, C Yanagisawa, G Yang, T Yano, K Yasutome, S Yen, N Yershov, M Yokoyama, T Yoshida, M Yu, A Zalewska, J Zalipska, K Zaremba, G Zarnecki, M Ziembicki, ED Zimmerman, M Zito, S Zsoldos, A Zykova

The current laws of physics do not explain the observed imbalance of matter and antimatter in the universe. Sakharov proposed that an explanation would require the violation of CP symmetry between matter and antimatter. The only CP violation observed so far is in the weak interactions of quarks, and it is too small to explain the matter-antimatter imbalance of the universe. It has been shown that CP violation in the lepton sector could generate the matter-antimatter disparity through the process called leptogenesis. The quantum mixing of neutrinos, the neutral leptons in the Standard Model, provides a potential source of CP violation through a complex phase dCP, which may have consequences for theoretical models of leptogenesis. This CP violation can be measured in muon neutrino to electron neutrino oscillations and the corresponding antineutrino oscillations, which are experimentally accessible with accelerator-produced beams as established by the T2K experiment. Until now, the value of dCP has not been significantly constrained by neutrino oscillation experiments. Here the T2K collaboration reports a measurement that favors large enhancement of the neutrino oscillation probability, excluding values of dCP which result in a large enhancement of the observed anti-neutrino oscillation probability at three standard deviations (3 sigma). The 3 sigma confidence level interval for dCP, which is cyclic and repeats every 2pi, is [-3.41,-0.03] for the so-called normal mass ordering, and [-2.54,-0.32] for the inverted mass ordering. Our results show an indication of CP violation in the lepton sector. Herein we establish methods for sensitive searches for matter-antimatter asymmetry in neutrino oscillations using accelerator-produced neutrino beams. Future measurements with larger data samples will determine whether the leptonic CP violation is larger than the quark sector CP violation.


First combined measurement of the muon neutrino and antineutrino charged-current cross section without pions in the final state at T2K

PHYSICAL REVIEW D 101 (2020) ARTN 112001

C Barry, M Batkiewicz-Kwasniak, A Beloshapkin, F Bench, V Berardi, L Berns, S Bhadra, S Bienstock, A Blondel, S Bolognesi, T Bonus, B Bourguille, S Boyd, D Brailsford, A Bubak, MB Avanzini, J Calcutt, T Campbell, S Cao, S Cartwright, M Catanesi, C Checchia, D Cherdack, N Chikuma, L Koch

© 2020 authors. Published by the American Physical Society. This paper presents the first combined measurement of the double-differential muon neutrino and antineutrino charged-current cross sections with no pions in the final state on hydrocarbon at the off-axis near detector of the T2K experiment. The data analyzed in this work comprise 5.8×1020 and 6.3×1020 protons on target in neutrino and antineutrino mode respectively, at a beam energy peak of 0.6 GeV. Using the two measured cross sections, the sum, difference, and asymmetry were calculated with the aim of better understanding the nuclear effects involved in such interactions. The extracted measurements have been compared with the prediction from different Monte Carlo generators and theoretical models showing that the difference between the two cross sections have interesting sensitivity to nuclear effects.


Search for heavy neutral leptons decaying into muon-pion pairs in the MicroBooNE detector

PHYSICAL REVIEW D 101 (2020) ARTN 052001

P Abratenko, M Alrashed, R An, J Anthony, J Asaadi, A Ashkenazi, S Balasubramanian, B Baller, C Barnes, G Barr, V Basque, S Berkman, A Bhanderi, A Bhat, M Bishai, A Blake, T Bolton, L Camilleri, D Caratelli, IC Terrazas, RC Fernandez, F Cavanna, G Cerati, Y Chen, E Church, D Cianci, EO Cohen, JM Conrad, M Convery, L Cooper-Troendle, JI Crespo-Anadon, M Del Tutto, D Devitt, L Domine, K Duffy, S Dytman, B Eberly, A Ereditato, LE Sanchez, JJ Evans, RS Fitzpatrick, BT Fleming, N Foppiani, D Franco, AP Furmanski, D Garcia-Gamez, S Gardiner, V Genty, D Goeldi, S Gollapinni, O Goodwin, E Gramellini, P Green, H Greenlee, L Gu, W Gu, R Guenette, P Guzowski, P Hamilton, O Hen, C Hill, GA Horton-Smith, A Hourlier, E-C Huang, R Itay, C James, JJ de Vries, X Ji, L Jiang, JH Jo, RA Johnson, J Joshi, Y-J Jwa, G Karagiorgi, W Ketchum, B Kirby, M Kirby, T Kobilarcik, I Kreslo, R LaZur, I Lepetic, Y Li, A Lister, BR Littlejohn, S Lockwitz, D Lorca, WC Louis, M Luethi, B Lundberg, X Luo, A Marchionni, S Marcocci, C Mariani, J Marshall, J Martin-Albo, DAM Caicedo, K Mason, A Mastbaum, N McConkey, V Meddage, T Mettler, K Miller, J Mills, K Mistry, A Mogan, T Mohayai, J Moon, M Mooney, CD Moore, J Mousseau, R Murrells, D Naples, RK Neely, P Nienaber, J Nowak, O Palamara, V Pandey, V Paolone, A Papadopoulou, V Papavassiliou, SF Pate, A Paudel, Z Pavlovic, E Piasetzky, D Porzio, S Prince, G Pulliam, X Qian, JL Raaf, V Radeka, A Rafique, L Ren, L Rochester, HE Rogers, M Ross-Lonergan, CR von Rohr, B Russell, G Scanavini, DW Schmitz, A Schukraft, W Seligman, MH Shaevitz, R Sharankova, J Sinclair, A Smith, EL Snider, M Soderberg, S Soldner-Rembold, SR Soleti, P Spentzouris, J Spitz, M Stancari, J St John, T Strauss, K Sutton, S Sword-Fehlberg, AM Szelc, N Tagg, W Tang, K Terao, RT Thornton, M Toups, Y-T Tsai, S Tufanli, MA Uchida, T Usher, W Van De Pontseele, RG Van de Water, B Viren, M Weber, H Wei, DA Wickremasinghe, Z Williams, S Wolbers, T Wongjirad, K Woodruff, M Wospakrik, W Wu, T Yang, G Yarbrough, LE Yates, GP Zeller, J Zennamo, C Zhang, M Collaboration


Precision Constraints for Three-Flavor Neutrino Oscillations from the Full MINOS+ and MINOS Dataset.

Physical review letters 125 (2020) 131802-

P Adamson, I Anghel, A Aurisano, G Barr, A Blake, SV Cao, TJ Carroll, CM Castromonte, R Chen, S Childress, JAB Coelho, S De Rijck, JJ Evans, GJ Feldman, W Flanagan, M Gabrielyan, S Germani, RA Gomes, P Gouffon, N Graf, K Grzelak, A Habig, SR Hahn, J Hartnell, R Hatcher, A Holin, J Huang, LW Koerner, M Kordosky, A Kreymer, K Lang, P Lucas, WA Mann, ML Marshak, N Mayer, R Mehdiyev, JR Meier, WH Miller, G Mills, D Naples, JK Nelson, RJ Nichol, J O'Connor, RB Pahlka, Ž Pavlović, G Pawloski, A Perch, MM Pfützner, DD Phan, RK Plunkett, N Poonthottathil, X Qiu, A Radovic, P Sail, MC Sanchez, J Schneps, A Schreckenberger, R Sharma, A Sousa, N Tagg, J Thomas, MA Thomson, A Timmons, J Todd, SC Tognini, R Toner, D Torretta, P Vahle, A Weber, LH Whitehead, SG Wojcicki, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mi>MINOS</mi><mo>+</mo></mrow></math> Collaboration

We report the final measurement of the neutrino oscillation parameters Δm_{32}^{2} and sin^{2}θ_{23} using all data from the MINOS and MINOS+ experiments. These data were collected using a total exposure of 23.76×10^{20} protons on target producing ν_{μ} and ν[over ¯]_{μ} beams and 60.75 kt yr exposure to atmospheric neutrinos. The measurement of the disappearance of ν_{μ} and the appearance of ν_{e} events between the Near and Far detectors yields |Δm_{32}^{2}|=2.40_{-0.09}^{+0.08}(2.45_{-0.08}^{+0.07})×10^{-3}  eV^{2} and sin^{2}θ_{23}=0.43_{-0.04}^{+0.20}(0.42_{-0.03}^{+0.07}) at 68% C.L. for normal (inverted) hierarchy.


Calibration of the charge and energy loss per unit length of the MicroBooNE liquid argon time projection chamber using muons and protons

JOURNAL OF INSTRUMENTATION 15 (2020) ARTN P03022

C Adams, M Alrashed, R An, J Anthony, J Asaadi, A Ashkenazi, S Balasubramanian, B Baller, C Barnes, G Barr, V Basque, M Bass, F Bay, S Berkman, A Bhanderi, A Bhat, M Bishai, A Blake, T Bolton, L Camilleri, D Caratelli, IC Terrazas, R Carr, RC Fernandez, F Cavanna, G Cerati, Y Chen, E Church, D Cianci, EO Cohen, JM Conrad, M Convery, L Cooper-Troendle, JI Crespo-Anadon, M Del Tutto, D Devitt, A Diaz, L Domine, K Duffy, S Dytman, B Eberly, A Ereditato, LE Sanchez, J Esquivel, JJ Evans, RS Fitzpatrick, BT Fleming, N Foppiani, D Franco, AP Furmanski, D Garcia-Gamez, S Gardiner, V Genty, D Goeldi, S Gollapinni, O Goodwin, E Gramellini, P Green, H Greenlee, R Grosso, L Gu, W Gu, R Guenette, P Guzowski, P Hamilton, O Hen, C Hill, GA Horton-Smith, A Hourlier, EC Huang, R Itay, C James, JJ de Vries, X Ji, L Jiang, JH Jo, RA Johnson, J Joshi, YJ Jwa, G Karagiorgi, W Ketchum, B Kirby, M Kirby, T Kobilarcik, I Kreslo, I Lepetic, Y Li, A Lister, BR Littlejohn, S Lockwitz, D Lorca, WC Louis, M Luethi, B Lundberg, X Luo, A Marchionni, S Marcocci, C Mariani, J Marshall, J Martin-Albo, DAM Caicedo, K Mason, A Mastbaum, N McConkey, V Meddage, T Mettler, K Miller, J Mills, K Mistry, A Mogan, T Mohayai, J Moon, M Mooney, CD Moore, J Mousseau, M Murphy, R Murrells, D Naples, RK Neely, P Nienaber, J Nowak, O Palamara, V Pandey, V Paolone, A Papadopoulou, V Papavassiliou, SF Pate, A Paudel, Z Pavlovic, E Piasetzky, D Porzio, S Prince, G Pulliam, X Qian, J Raaf, A Rafique, L Ren, L Rochester, HE Rogers, M Ross-Lonergan, CR von Rohr, B Russell, G Scanavini, DW Schmitz, A Schukraft, W Seligman, MH Shaevitz, R Sharankova, J Sinclair, A Smith, EL Snider, M Soderberg, S Soldner-Rembold, S Soleti, P Spentzouris, J Spitz, M Stancari, J St John, T Strauss, K Sutton, S Sword-Fehlberg, AM Szelc, N Tagg, W Tang, K Terao, RT Thornton, M Toups, Y-T Tsai, S Tufanli, T Usher, W Van De Pontseele, RG Van de Water, B Viren, M Weber, H Wei, DA Wickremasinghe, Z Williams, S Wolbers, T Wongjirad, K Woodruff, M Wospakrik, W Wu, T Yang, G Yarbrough, LE Yates, GP Zeller, J Zennamo, C Zhang, M Collaboration


Constraint of the MINERνA medium energy neutrino flux using neutrino-electron elastic scattering

Physical Review D American Physical Society 100 (2019) 092001

E Valencia, D Jena, D Coplowe, X Lu


Sensitivity of Super-Kamiokande with gadolinium to low energy antineutrinos from pre-supernova emission

Astrophysical Journal American Astronomical Society 885 (2019) 133

C Simpson, K Abe, M Ikeda, H Ito, K Iyogi, J Kameda, Y Kataoka, Y Kato, Y Kishimoto, T Mochizuki, G Pronost, H Sekiya, A Takenaka, K Okumura, D Bravo-Berguno, P Fernandez, FDM Blaszczyk, C Kachulis, S Sussman, S Berkman, J Bian, NJ Griskevich, WR Kropp, S Locke, D Wark

Supernova detection is a major objective of the Super-Kamiokande (SK) experiment. In the next stage of SK (SK-Gd), gadolinium (Gd) sulfate will be added to the detector, which will improve the ability of the detector to identify neutrons. A core-collapse supernova (CCSN) will be preceded by an increasing flux of neutrinos and antineutrinos, from thermal and weak nuclear processes in the star, over a timescale of hours; some of which may be detected at SK-Gd. This could provide an early warning of an imminent CCSN, hours earlier than the detection of the neutrinos from core collapse. Electron antineutrino detection will rely on inverse beta decay events below the usual analysis energy threshold of SK, so Gd loading is vital to reduce backgrounds while maximizing detection efficiency. Assuming normal neutrino mass ordering, more than 200 events could be detected in the final 12 hr before core collapse for a 15–25 solar mass star at around 200 pc, which is representative of the nearest red supergiant to Earth, α-Ori (Betelgeuse). At a statistical false alarm rate of 1 per century, detection could be up to 10 hr before core collapse, and a pre-supernova star could be detected by SK-Gd up to 600 pc away. A pre-supernova alert could be provided to the astrophysics community following gadolinium loading.


A response-matrix-centred approach to presenting cross-section measurements

JOURNAL OF INSTRUMENTATION 14 (2019) ARTN P09013

L Koch


Commissioning and Operation of the Readout System for the SoLid Neutrino Detector

Journal of Instrumentation IOP Publishing (2019)

Y Abreu, Y Amhis, G Ban, W Beaumont, S Binet, M Bongrand, D Boursette, BC Castle, H Chanal, K Clark, B Coupé, P Crochet, D Cussans, AD Roeck, D Durand, M Fallot, L Ghys, L Giot, K Graves, B Guillon, D Henaff, B Hosseini, S Ihantola, S Jenzer, S Kalcheva, LN Kalousis, M Labare, G Lehaut, S Manley, L Manzanillas, J Mermans, I Michiels, S Monteil, C Moortgat, D Newbold, J Park, V Pestel, K Petridis, I Piñera, L Popescu, D Ryckbosch, N Ryder, D Saunders, M-H Schune, M Settimo, L Simard, A Vacheret, G Vandierendonck, SV Dyck, PV Mulders, NV Remortel, S Vercaemer, M Verstraeten, B Viaud, A Weber, F Yermia

The SoLid experiment aims to measure neutrino oscillation at a baseline of 6.4 m from the BR2 nuclear reactor in Belgium. Anti-neutrinos interact via inverse beta decay (IBD), resulting in a positron and neutron signal that are correlated in time and space. The detector operates in a surface building, with modest shielding, and relies on extremely efficient online rejection of backgrounds in order to identify these interactions. A novel detector design has been developed using 12800 5 cm cubes for high segmentation. Each cube is formed of a sandwich of two scintillators, PVT and 6LiF:ZnS(Ag), allowing the detection and identification of positrons and neutrons respectively. The active volume of the detector is an array of cubes measuring 80x80x250 cm (corresponding to a fiducial mass of 1.6 T), which is read out in layers using two dimensional arrays of wavelength shifting fibres and silicon photomultipliers, for a total of 3200 readout channels. Signals are recorded with 14 bit resolution, and at 40 MHz sampling frequency, for a total raw data rate of over 2 Tbit/s. In this paper, we describe a novel readout and trigger system built for the experiment, that satisfies requirements on: compactness, low power, high performance, and very low cost per channel. The system uses a combination of high price-performance FPGAs with a gigabit Ethernet based readout system, and its total power consumption is under 1 kW. The use of zero suppression techniques, combined with pulse shape discrimination trigger algorithms to detect neutrons, results in an online data reduction factor of around 10000. The neutron trigger is combined with a large per-channel history time buffer, allowing for unbiased positron detection. The system was commissioned in late 2017, with successful physics data taking established in early 2018.


Pion-proton correlation in neutrino interactions on nuclei

Physical Review D American Physical Society 100 (2019) 073010

T Cai, X Lu, D Ruterbories

In neutrino-nucleus interactions, a proton produced with a correlated pion might exhibit a left-right asymmetry relative to the lepton scattering plane even when the pion is absorbed. Absent in other proton production mechanisms, such an asymmetry measured in charged-current pionless production could reveal the details of the absorbed-pion events that are otherwise inaccessible. In this study, we demonstrate the idea of using final-state proton left-right asymmetries to quantify the absorbed-pion event fraction and underlying kinematics. This technique might provide critical information that helps constrain all underlying channels in neutrino-nucleus interactions in the GeV regime.


Measurement of neutrino and antineutrino neutral-current quasielastic-like interactions on oxygen by detecting nuclear de-excitation $γ$-rays

Physical Review D: Particles, Fields, Gravitation and Cosmology American Physical Society (2019)

K Abe, R Akutsu, A Ali, C Alt, C Andreopoulos, L Anthony, M Antonova, S Aoki, A Ariga, Y Ashida, ET Atkin, Y Awataguchi, S Ban, M Barbi, GJ Barker, G Barr, C Barry, M Batkiewicz-Kwasniak, A Beloshapkin, F Bench, V Berardi, S Berkman, L Berns, S Bhadra, S Bienstock, A Blondel, S Bolognesi, B Bourguille, SB Boyd, D Brailsford, A Bravar, DB Berguño, C Bronner, A Bubak, MB Avanzini, J Calcutt, T Campbell, S Cao, SL Cartwright, MG Catanesi, A Cervera, A Chappell, C Checchia, D Cherdack, N Chikuma, G Christodoulou, J Coleman, G Collazuol, L Cook, D Coplowe, A Cudd, A Dabrowska, GD Rosa, T Dealtry, PF Denner, SR Dennis, C Densham, FD Lodovico, N Dokania, S Dolan, O Drapier, J Dumarchez, P Dunne, L Eklund, S Emery-Schrenk, A Ereditato, P Fernandez, T Feusels, AJ Finch, GA Fiorentini, G Fiorillo, C Francois, M Friend, Y Fujii, R Fujita, D Fukuda, R Fukuda, Y Fukuda, K Gameil, C Giganti, T Golan, M Gonin, A Gorin, M Guigue, DR Hadley, JT Haigh, P Hamacher-Baumann, M Hartz, T Hasegawa, NC Hastings, T Hayashino, Y Hayato, A Hiramoto, M Hogan, J Holeczek, NTH Van, F Iacob, AK Ichikawa, M Ikeda, T Ishida, T Ishii, M Ishitsuka, K Iwamoto, A Izmaylov, B Jamieson, SJ Jenkins, C Jesús-Valls, M Jiang, S Johnson, P Jonsson, CK Jung, M Kabirnezhad, AC Kaboth, T Kajita, H Kakuno, J Kameda, D Karlen, SP Kasetti, Y Kataoka, T Katori, Y Kato, E Kearns, M Khabibullin, A Khotjantsev, T Kikawa, H Kim, J Kim, S King, J Kisiel, A Knight, A Knox, T Kobayashi, L Koch, T Koga, A Konaka, LL Kormos, Y Koshio, K Kowalik, H Kubo, Y Kudenko, N Kukita, S Kuribayashi, R Kurjata, T Kutter, M Kuze, L Labarga, J Lagoda, M Lamoureux, M Laveder, M Lawe, M Licciardi, T Lindner, RP Litchfield, SL Liu, X Li, A Longhin, L Ludovici, X Lu, T Lux, LN Machado, L Magaletti, K Mahn, M Malek, S Manly, L Maret, AD Marino, JF Martin, T Maruyama, T Matsubara, K Matsushita, V Matveev, K Mavrokoridis, E Mazzucato, M McCarthy, N McCauley, KS McFarland, C McGrew, A Mefodiev, C Metelko, M Mezzetto, A Minamino, O Mineev, S Mine, M Miura, LM Bueno, S Moriyama, J Morrison, TA Mueller, L Munteanu, S Murphy, Y Nagai, T Nakadaira, M Nakahata, Y Nakajima, A Nakamura, KG Nakamura, K Nakamura, S Nakayama, T Nakaya, K Nakayoshi, C Nantais, TV Ngoc, K Niewczas, K Nishikawa, Y Nishimura, TS Nonnenmacher, F Nova, P Novella, J Nowak, JC Nugent, HM O'Keeffe, L O'Sullivan, T Odagawa, K Okumura, T Okusawa, SM Oser, RA Owen, Y Oyama, V Palladino, JL Palomino, V Paolone, WC Parker, P Paudyal, M Pavin, D Payne, GC Penn, L Pickering, C Pidcott, ESP Guerra, C Pistillo, B Popov, K Porwit, M Posiadala-Zezula, A Pritchard, B Quilain, T Radermacher, E Radicioni, B Radics, PN Ratoff, E Reinherz-Aronis, C Riccio, E Rondio, S Roth, A Rubbia, AC Ruggeri, A Rychter, K Sakashita, F Sánchez, CM Schloesser, K Scholberg, J Schwehr, M Scott, Y Seiya, T Sekiguchi, H Sekiya, D Sgalaberna, R Shah, A Shaikhiev, F Shaker, A Shaykina, M Shiozawa, W Shorrock, A Shvartsman, A Smirnov, M Smy, JT Sobczyk, H Sobel, FJP Soler, Y Sonoda, J Steinmann, S Suvorov, A Suzuki, SY Suzuki, Y Suzuki, AA Sztuc, M Tada, M Tajima, A Takeda, Y Takeuchi, HK Tanaka, HA Tanaka, S Tanaka, LF Thompson, W Toki, C Touramanis, KM Tsui, T Tsukamoto, M Tzanov, Y Uchida, W Uno, M Vagins, S Valder, Z Vallari, D Vargas, G Vasseur, C Vilela, WGS Vinning, T Vladisavljevic, VV Volkov, T Wachala, J Walker, JG Walsh, Y Wang, D Wark, MO Wascko, A Weber, R Wendell, MJ Wilking, C Wilkinson, JR Wilson, RJ Wilson, K Wood, C Wret, Y Yamada, K Yamamoto, C Yanagisawa, G Yang, T Yano, K Yasutome, S Yen, N Yershov, M Yokoyama, T Yoshida, M Yu, A Zalewska, J Zalipska, K Zaremba, G Zarnecki, M Ziembicki, ED Zimmerman, M Zito, S Zsoldos, A Zykova

Neutrino- and antineutrino-oxygen neutral-current quasielastic-like interactions are measured at Super-Kamiokande using nuclear de-excitation $\gamma$-rays to identify signal-like interactions in data from a $14.94 \ (16.35)\times 10^{20}$ protons-on-target exposure of the T2K neutrino (antineutrino) beam. The measured flux-averaged cross sections on oxygen nuclei are $\langle \sigma_{\nu {\rm -NCQE}} \rangle = 1.70 \pm 0.17 ({\rm stat.}) ^{+ {\rm 0.51}}_{- {\rm 0.38}} ({\rm syst.}) \times 10^{-38} \ {\rm cm^2/oxygen}$ with a flux-averaged energy of 0.82 GeV and $\langle \sigma_{\bar{\nu} {\rm -NCQE}} \rangle = 0.98 \pm 0.16 ({\rm stat.}) ^{+ {\rm 0.26}}_{- {\rm 0.19}} ({\rm syst.}) \times 10^{-38} \ {\rm cm^2/oxygen}$ with a flux-averaged energy of 0.68 GeV, for neutrinos and antineutrinos, respectively. These results are the most precise to date, and the antineutrino result is the first cross section measurement of this channel. They are compared with various theoretical predictions. The impact on evaluation of backgrounds to searches for supernova relic neutrinos at present and future water Cherenkov detectors is also discussed.

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