Publications


Black hole genesis of dark matter

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2018) ARTN 009

O Lennon, J March-Russell, R Petrossian-Byrne, H Tillim


Heterotic line bundle models on elliptically fibered Calabi-Yau three-folds

JOURNAL OF HIGH ENERGY PHYSICS (2018) ARTN 087

AP Braun, CR Brodie, A Lukas


Search for neutrinos from decaying dark matter with IceCube

Eur. Phys. J. C (2018) 78: 831 (2018)

I Collaboration, MG Aartsen, M Ackermann, J Adams, JA Aguilar, M Ahlers, M Ahrens, IA Samarai, D Altmann, K Andeen, T Anderson, I Ansseau, G Anton, C Argüelles, J Auffenberg, S Axani, P Backes, H Bagherpour, X Bai, JP Barron, SW Barwick, V Baum, R Bay, JJ Beatty, JB Tjus, K-H Becker, S BenZvi, D Berley, E Bernardini, DZ Besson, G Binder, D Bindig, E Blaufuss, S Blot, C Bohm, M Börner, F Bos, S Böser, O Botner, E Bourbeau, J Bourbeau, F Bradascio, J Braun, M Brenzke, H-P Bretz, S Bron, J Brostean-Kaiser, A Burgman, RS Busse, T Carver, E Cheung, D Chirkin, A Christov, K Clark, L Classen, GH Collin, JM Conrad, P Coppin, P Correa, DF Cowen, R Cross, P Dave, M Day, JPAMD André, CD Clercq, JJ DeLaunay, H Dembinski, SD Ridder, P Desiati, KDD Vries, GD Wasseige, MD With, T DeYoung, JC Díaz-Vélez, VD Lorenzo, H Dujmovic, JP Dumm, M Dunkman, E Dvorak, B Eberhardt, T Ehrhardt, B Eichmann, P Eller, PA Evenson, S Fahey, AR Fazely, J Felde, K Filimonov, C Finley, S Flis, A Franckowiak, E Friedman, A Fritz, TK Gaisser, J Gallagher, E Ganster, L Gerhardt, K Ghorbani, W Giang, T Glauch, T Glüsenkamp, A Goldschmidt, JG Gonzalez, D Grant, Z Griffith, C Haack, A Hallgren, L Halve, F Halzen, K Hanson, D Hebecker, D Heereman, K Helbing, R Hellauer, S Hickford, J Hignight, GC Hill, KD Hoffman, R Hoffmann, T Hoinka, B Hokanson-Fasig, K Hoshina, F Huang, M Huber, K Hultqvist, M Hünnefeld, R Hussain, S In, N Iovine, A Ishihara, E Jacobi, GS Japaridze, M Jeong, K Jero, BJP Jones, P Kalaczynski, W Kang, A Kappes, D Kappesser, T Karg, A Karle, U Katz, M Kauer, A Keivani, JL Kelley, A Kheirandish, J Kim, M Kim, T Kintscher, J Kiryluk, T Kittler, SR Klein, R Koirala, H Kolanoski, L Köpke, C Kopper, S Kopper, JP Koschinsky, DJ Koskinen, M Kowalski, K Krings, M Kroll, G Krückl, S Kunwar, N Kurahashi, T Kuwabara, A Kyriacou, M Labare, JL Lanfranchi, MJ Larson, F Lauber, K Leonard, M Lesiak-Bzdak, M Leuermann, QR Liu, E Lohfink, CJL Mariscal, L Lu, J Lünemann, W Luszczak, J Madsen, G Maggi, KBM Mahn, S Mancina, R Maruyama, K Mase, R Maunu, K Meagher, M Medici, M Meier, T Menne, G Merino, T Meures, S Miarecki, J Micallef, G Momenté, T Montaruli, RW Moore, M Moulai, R Nahnhauer, P Nakarmi, U Naumann, G Neer, H Niederhausen, SC Nowicki, DR Nygren, AO Pollmann, A Olivas, A O'Murchadha, E O'Sullivan, T Palczewski, H Pandya, DV Pankova, P Peiffer, JA Pepper, CPDL Heros, D Pieloth, E Pinat, M Plum, PB Price, GT Przybylski, C Raab, L Rädel, M Rameez, L Rauch, K Rawlins, IC Rea, R Reimann, B Relethford, M Relich, E Resconi, W Rhode, M Richman, S Robertson, M Rongen, C Rott, T Ruhe, D Ryckbosch, D Rysewyk, I Safa, SES Herrera, A Sandrock, J Sandroos, M Santander, S Sarkar, S Sarkar, K Satalecka, M Schaufel, P Schlunder, T Schmidt, A Schneider, S Schoenen, S Schöneberg, L Schumacher, S Sclafani, D Seckel, S Seunarine, J Soedingrekso, D Soldin, M Song, GM Spiczak, C Spiering, J Stachurska, M Stamatikos, T Stanev, A Stasik, R Stein, J Stettner, A Steuer, T Stezelberger, RG Stokstad, A Stößl, NL Strotjohann, T Stuttard, GW Sullivan, M Sutherland, I Taboada, J Tatar, F Tenholt, S Ter-Antonyan, A Terliuk, S Tilav, PA Toale, MN Tobin, C Tönnis, S Toscano, D Tosi, M Tselengidou, CF Tung, A Turcati, CF Turley, B Ty, E Unger, M Usner, J Vandenbroucke, WV Driessche, DV Eijk, NV Eijndhoven, S Vanheule, JV Santen, M Vraeghe, C Walck, A Wallace, M Wallraff, FD Wandler, N Wandkowsky, A Waza, C Weaver, MJ Weiss, C Wendt, J Werthebach, S Westerhoff, BJ Whelan, K Wiebe, CH Wiebusch, L Wille, DR Williams, L Wills, M Wolf, J Wood, TR Wood, E Woolsey, K Woschnagg, G Wrede, DL Xu, XW Xu, Y Xu, JP Yanez, G Yodh, S Yoshida, T Yuan

With the observation of high-energy astrophysical neutrinos by the IceCube Neutrino Observatory, interest has risen in models of PeV-mass decaying dark matter particles to explain the observed flux. We present two dedicated experimental analyses to test this hypothesis. One analysis uses six years of IceCube data focusing on muon neutrino 'track' events from the Northern Hemisphere, while the second analysis uses two years of 'cascade' events from the full sky. Known background components and the hypothetical flux from unstable dark matter are fitted to the experimental data. Since no significant excess is observed in either analysis, lower limits on the lifetime of dark matter particles are derived: We obtain the strongest constraint to date, excluding lifetimes shorter than $10^{28}\,$s at $90\%$ CL for dark matter masses above $10\,$TeV.


Matter field Kähler metric in heterotic string theory from localisation

Journal of High Energy Physics Institute of Physics Publishing (2018)

A Lukas, S Blesneag, E Buchbinder, A Constantin


Towards ultimate parton distributions at the high-luminosity LHC

European Physical Journal C 78 (2018)

RA Khalek, S Bailey, J Gao, L Harland-Lang, J Rojo

© 2018, The Author(s). Since its start of data taking, the LHC has provided an impressive wealth of information on the quark and gluon structure of the proton. Indeed, modern global analyses of parton distribution functions (PDFs) include a wide range of LHC measurements of processes such as the production of jets, electroweak gauge bosons, and top quark pairs. In this work, we assess the ultimate constraining power of LHC data on the PDFs that can be expected from the complete dataset, in particular after the High-Luminosity (HL) phase, starting in around 2025. The huge statistics of the HL-LHC, delivering L=3ab-1 to ATLAS and CMS and L=0.3ab-1 to LHCb, will lead to an extension of the kinematic coverage of PDF-sensitive measurements as well as to an improvement in their statistical and systematic uncertainties. Here we generate HL-LHC pseudo-data for different projections of the experimental uncertainties, and then quantify the resulting constraints on the PDF4LHC15 set by means of the Hessian profiling method. We find that HL-LHC measurements can reduce PDF uncertainties by up to a factor of 2 to 4 in comparison to state-of-the-art fits, leading to few-percent uncertainties for important observables such as the Higgs boson transverse momentum distribution via gluon-fusion. Our results illustrate the significant improvement in the precision of PDF fits achievable from hadron collider data alone, and motivate the continuation of the ongoing successful program of PDF-sensitive measurements by the LHC collaborations.


Neutrino Interferometry for High-Precision Tests of Lorentz Symmetry with IceCube

Nature Physics Nature Publishing Group (2018)

I Collaboration, MG Aartsen, M Ackermann, J Adams, JA Aguilar, M Ahlers, M Ahrens, IA Samarai, D Altmann, K Andeen, T Anderson, I Ansseau, G Anton, C Argüelles, J Auffenberg, S Axani, H Bagherpour, X Bai, JP Barron, SW Barwick, V Baum, R Bay, JJ Beatty, JB Tjus, K-H Becker, S BenZvi, D Berley, E Bernardini, DZ Besson, G Binder, D Bindig, E Blaufuss, S Blot, C Bohm, M Börner, F Bos, D Bose, S Böser, O Botner, E Bourbeau, J Bourbeau, F Bradascio, J Braun, L Brayeur, M Brenzke, H-P Bretz, S Bron, J Brostean-Kaiser, A Burgman, T Carver, J Casey, M Casier, E Cheung, D Chirkin, A Christov, K Clark, L Classen, S Coenders, GH Collin, JM Conrad, DF Cowen, R Cross, M Day, JPAMD André, CD Clercq, JJ DeLaunay, H Dembinski, SD Ridder, P Desiati, KDD Vries, GD Wasseige, MD With, T DeYoung, JC Díaz-Vélez, VD Lorenzo, H Dujmovic, JP Dumm, M Dunkman, E Dvorak, B Eberhardt, T Ehrhardt, B Eichmann, P Eller, PA Evenson, S Fahey, AR Fazely, J Felde, K Filimonov, C Finley, S Flis, A Franckowiak, E Friedman, T Fuchs, TK Gaisser, J Gallagher, L Gerhardt, K Ghorbani, W Giang, T Glauch, T Glüsenkamp, A Goldschmidt, JG Gonzalez, D Grant, Z Griffith, C Haack, A Hallgren, F Halzen, K Hanson, D Hebecker, D Heereman, K Helbing, R Hellauer, S Hickford, J Hignight, GC Hill, KD Hoffman, R Hoffmann, B Hokanson-Fasig, K Hoshina, F Huang, M Huber, K Hultqvist, M Hünnefeld, S In, A Ishihara, E Jacobi, GS Japaridze, M Jeong, K Jero, BJP Jones, P Kalaczynski, W Kang, A Kappes, T Karg, A Karle, T Katori, U Katz, M Kauer, A Keivani, JL Kelley, A Kheirandish, J Kim, M Kim, T Kintscher, J Kiryluk, T Kittler, SR Klein, G Kohnen, R Koirala, H Kolanoski, L Köpke, C Kopper, S Kopper, JP Koschinsky, DJ Koskinen, M Kowalski, K Krings, M Kroll, G Krückl, J Kunnen, S Kunwar, N Kurahashi, T Kuwabara, A Kyriacou, M Labare, JL Lanfranchi, MJ Larson, F Lauber, M Lesiak-Bzdak, M Leuermann, QR Liu, L Lu, J Lünemann, W Luszczak, J Madsen, G Maggi, KBM Mahn, S Mancina, S Mandalia, R Maruyama, K Mase, R Maunu, F McNally, K Meagher, M Medici, M Meier, T Menne, G Merino, T Meures, S Miarecki, J Micallef, G Momenté, T Montaruli, RW Moore, M Moulai, R Nahnhauer, P Nakarmi, U Naumann, G Neer, H Niederhausen, SC Nowicki, DR Nygren, AO Pollmann, A Olivas, A O'Murchadha, T Palczewski, H Pandya, DV Pankova, P Peiffer, JA Pepper, CPDL Heros, D Pieloth, E Pinat, M Plum, PB Price, GT Przybylski, C Raab, L Rädel, M Rameez, K Rawlins, IC Rea, R Reimann, B Relethford, M Relich, E Resconi, W Rhode, M Richman, S Robertson, M Rongen, C Rott, T Ruhe, D Ryckbosch, D Rysewyk, T Sälzer, SES Herrera, A Sandrock, J Sandroos, M Santander, S Sarkar, S Sarkar, K Satalecka, P Schlunder, T Schmidt, A Schneider, S Schoenen, S Schöneberg, L Schumacher, D Seckel, S Seunarine, J Soedingrekso, D Soldin, M Song, GM Spiczak, C Spiering, J Stachurska, M Stamatikos, T Stanev, A Stasik, J Stettner, A Steuer, T Stezelberger, RG Stokstad, A Stößl, NL Strotjohann, T Stuttard, GW Sullivan, M Sutherland, I Taboada, J Tatar, F Tenholt, S Ter-Antonyan, A Terliuk, G Tešić, S Tilav, PA Toale, MN Tobin, S Toscano, D Tosi, M Tselengidou, CF Tung, A Turcati, CF Turley, B Ty, E Unger, M Usner, J Vandenbroucke, WV Driessche, NV Eijndhoven, S Vanheule, JV Santen, M Vehring, E Vogel, M Vraeghe, C Walck, A Wallace, M Wallraff, FD Wandler, N Wandkowsky, A Waza, C Weaver, MJ Weiss, C Wendt, J Werthebach, S Westerhoff, BJ Whelan, K Wiebe, CH Wiebusch, L Wille, DR Williams, L Wills, M Wolf, J Wood, TR Wood, E Woolsey, K Woschnagg, DL Xu, XW Xu, Y Xu, JP Yanez, G Yodh, S Yoshida, T Yuan, M Zoll

Lorentz symmetry is a fundamental space-time symmetry underlying the Standard Model of particle physics and gravity. However, unified theories, such as string theory, allow for violation of this symmetry. Thus, the discovery of Lorentz symmetry violation could be the first hint of these theories. Here, we use high-energy atmospheric neutrinos observed at the IceCube Neutrino Observatory to search for anomalous neutrino oscillations as signals of Lorentz violation. The large range of neutrino energies and propagation baselines, together with high statistics, let us perform the most precise test of space-time symmetry in the neutrino sector to date. We find no evidence for Lorentz violation. This allows us to constrain the size of the dimension-four operator in the Standard-Model Extension for Lorentz violation to the $10^{-28}$ level and to set limits on higher dimensional operators of that theory. These are among the most stringent limits on Lorentz violation across all fields of physics.


Search for nonstandard neutrino interactions with IceCube DeepCore

Physical Review D, Particles and fields American Physical Society 97 (2018) ARTN 072009

MG Aartsen, M Ackermann, J Adams, JA Aguilar, M Ahlers, M Ahrens, I Al Samarai, D Altmann, K Andeen, T Anderson, I Ansseau, G Anton, C Arguelles, J Auffenberg, S Axani, H Bagherpour, X Bai, JP Barron, SW Barwick, V Baum, R Bay, JJ Beatty, JB Tjus, K-H Becker, S BenZvi, D Berley, E Bernardini, DZ Besson, G Binder, D Bindig, E Blaufuss, S Blot, C Bohm, M Boerner, F Bos, D Bose, S Boeser, O Botner, E Bourbeau, J Bourbeau, F Bradascio, J Braun, L Brayeur, M Brenzke, H-P Bretz, S Bron, J Brostean-Kaiser, A Burgman, T Carver, J Casey, M Casier, E Cheung, D Chirkin, A Christov, K Clark, L Classen, S Coenders, GH Collin, JM Conrad, DF Cowen, R Cross, M Day, JPAM de Andre, C De Clercq, JJ DeLaunay, H Dembinski, S De Ridder, P Desiati, KD de Vries, G de Wasseige, M de With, T DeYoung, JC Diaz-Velez, V di Lorenzo, H Dujmovic, JP Dumm, M Dunkman, E Dvorak, B Eberhardt, T Ehrhardt, B Eichmann, P Eller, PA Evenson, S Fahey, AR Fazely, J Felde, K Filimonov, C Finley, S Flis, A Franckowiak, E Friedman, T Fuchs, TK Gaisser, J Gallagher, L Gerhardt, K Ghorbani, W Giang, T Glauch, T Gluesenkamp, A Goldschmidt, JG Gonzalez, D Grant, Z Griffith, C Haack, A Hallgren, F Halzen, K Hanson, D Hebecker, D Heereman, K Helbing, R Hellauer, S Hickford, J Hignight, GC Hill, KD Hoffman, R Hoffmann, B Hokanson-Fasig, K Hoshina, F Huang, M Huber, K Hultqvist, M Huennefeld, S In, A Ishihara, E Jacobi, GS Japaridze, M Jeong, K Jero, BJP Jones, P Kalaczynski, W Kang, A Kappes, T Karg, A Karle, U Katz, M Kauer, A Keivani, JL Kelley, A Kheirandish, J Kim, M Kim, T Kintscher, C Kirby, J Kiryluk, T Kittler, SR Klein, G Kohnen, R Koirala, H Kolanoski, L Koepke, C Kopper, S Kopper, JP Koschinsky, DJ Koskinen, M Kowalski, K Krings, M Kroll, G Kruckl, J Kunnen, S Kunwar, N Kurahashi, T Kuwabara, A Kyriacou, M Labare, JL Lanfranchi, MJ Larson, F Lauber, D Lennarz, M Lesiak-Bzdak, M Leuermann, QR Liu, L Lu, J Luenemann, W Luszczak, J Madsen, G Maggi, KBM Mahn, S Mancina, R Maruyama, K Mase, R Maunu, F McNally, K Meagher, M Medici, M Meier, T Menne, G Merino, T Meures, S Miarecki, J Micallef, G Momente, T Montaruli, RW Moore, M Moulai, R Nahnhauer, P Nakarmi, U Naumann, G Neer, H Niederhausen, SC Nowicki, DR Nygren, AO Pollmann, A Olivas, A O'Murchadha, T Palczewski, H Pandya, DV Pankova, P Peiffer, JA Pepper, CP de los Heros, D Pieloth, E Pinat, M Plum, PB Price, GT Przybylski, C Raab, L Raedel, M Rameez, K Rawlins, IC Rea, R Reimann, B Relethford, M Relich, E Resconi, W Rhode, M Richman, S Robertson, M Rongen, C Rott, T Ruhe, D Ryckbosch, D Rysewyk, T Saelzer, SES Herrera, A Sandrock, J Sandroos, M Santander, S Sarkar, S Sarkar, K Satalecka, P Schlunder, T Schmidt, A Schneider, S Schoenen, S Schoeneberg, L Schumacher, D Seckel, S Seunarine, J Soedingrekso, D Soldin, M Song, GM Spiczak, C Spiering, J Stachurska, M Stamatikos, T Stanev, A Stasik, J Stettner, A Steuer, T Stezelberger, RG Stokstad, A Stossl, NL Strotjohann, T Stuttard, GW Sullivan, M Sutherland, I Taboada, J Tatar, F Tenholt, S Ter-Antonyan, A Terliuk, G Tesic, S Tilav, PA Toale, MN Tobin, S Toscano, D Tosi, M Tselengidou, CF Tung, A Turcati, CF Turley, B Ty, E Unger, M Usner, J Vandenbroucke, W Van Driessche, N van Eijndhoven, S Vanheule, J van Santen, M Vehring, E Vogel, M Vraeghe, C Walck, A Wallace, M Wallraff, FD Wandler, N Wandkowsky, A Waza, C Weaver, MJ Weiss, C Wendt, J Werthebach, S Westerhoff, BJ Whelan, K Wiebe, CH Wiebusch, L Wille, DR Williams, L Wills, M Wolf, J Wood, TR Wood, E Woolsey, K Woschnagg, DL Xu, XW Xu, Y Xu, JP Yanez, G Yodh, S Yoshida, T Yuan, M Zoll, I Collaboration


A Search for Neutrino Emission from Fast Radio Bursts with Six Years of IceCube Data

Astrophysical Journal University of Chicago Press 857 (2018) ARTN 117

MG Aartsen, M Ackermann, J Adams, JA Aguilar, M Ahlers, M Ahrens, I Al Samarai, D Altmann, K Andeen, T Anderson, I Ansseau, G Anton, C Arguelles, J Auffenberg, S Axani, H Bagherpour, X Bai, JP Barron, SW Barwick, V Baum, R Bay, JJ Beatty, JB Tjus, K-H Becker, S BenZvi, D Berley, E Bernardini, DZ Besson, G Binder, D Bindig, E Blaufuss, S Blot, C Bohm, M Boerner, F Bos, S Boeser, O Botner, E Bourbeau, J Bourbeau, F Bradascio, J Braun, M Brenzke, H-P Bretz, S Bron, J Brostean-Kaiser, A Burgman, RS Busse, T Carver, E Cheung, D Chirkin, A Christov, K Clark, L Classen, GH Collins, JM Conrad, P Coppin, P Correa, DF Cowen, R Cross, P Dave, M Day, JPAM de Andre, C De Clercq, JJ DeLaunay, H Dembinski, S De Ridder, P Desiati, KD de Vries, G de Wasseige, M de With, T DeYoung, JC Diaz-Velez, V di Lorenzo, H Dujmovic, JP Dumm, M Dunkman, E Dvorak, B Eberhardt, T Ehrhardt, B Eichmann, P Eller, PA Evenson, S Fahey, AR Fazely, J Felde, K Filimonov, C Finley, S Flis, A Franckowiak, E Friedman, A Fritz, TK Gaisser, J Gallagher, L Gerhardt, K Ghorbani, W Giang, T Glauch, T Gluesenkamp, A Goldschmidt, JG Gonzalez, D Grant, Z Griffith, C Haack, A Hallgren, F Halzen, K Hanson, D Hebecker, D Heereman, K Helbing, R Hellauer, S Hickford, J Hignight, GC Hill, KD Hoffman, R Hoffmann, T Hoinka, B Hokanson-Fasig, K Hoshina, F Huang, M Huber, K Hultqvist, M Huennefele, R Hussain, S In, N Iovine, A Ishihara, E Jacobi, GS Japaridze, M Jeong, K Jero, BJP Jones, P Kalaczynski, W Kang, A Kappes, D Kappesser, T Karg, A Karle, U Katz, M Kauer, A Keivani, JL Kelley, A Kheirandish, J Kim, M Kim, T Kintscher, J Kiryluk, T Kittler, SR Klein, R Koirala, H Kolanoski, L Koepke, C Kopper, S Kopper, JP Koschinsky, DJ Koskinen, M Kowalski, K Krings, M Kroll, G Krueckl, S Kunwar, N Kurahashi, T Kuwabara, A Kyriacou, M Labare, JL Lanfranchi, MJ Larson, F Lauber, K Leonard, M Lesiak-Bzdak, M Leuermann, QR Liu, CJL Mariscal, L Lu, J Luenemann, W Luszczak, J Madsen, G Maggi, KBM Mahn, S Mancina, R Maruyama, K Mase, R Maunu, K Meagher, M Medici, M Meier, T Menne, G Merino, T Meures, S Miarecki, J Micallef, G Momente, T Montaruli, RW Moore, M Moulai, R Nahnhauer, P Nakarmi, U Naumann, G Neer, H Niederhausen, SC Nowicki, DR Nygren, AO Pollmann, A Olivas, A O'Murchadha, E O'Sullivan, T Palczewski, H Pandya, DV Pankova, P Peiffer, JA Pepper, CP de los Heros, D Pieloth, E Pinat, M Plum, PB Price, GT Przybylski, C Raab, L Raedel, M Rameez, L Rauch, K Rawlins, IC Rea, R Reimann, B Relethford, M Relich, E Resconi, W Rhode, M Richman, S Robertson, M Rongen, C Rott, T Ruhe, D Ryckbosch, D Rysewyk, I Safa, T Saelzer, SES Herrera, A Sandrock, J Sandroos, M Santander, S Sarkar, K Satalecka, P Schlunder, T Schmidt, A Schneider, S Schoenen, S Schoenberg, L Schumacher, S Sclafani, D Seckel, S Seunarine, J Soedingrekso, D Soldin, M Song, GM Spiczak, C Spiering, J Stachurska, M Stamatikos, T Stanev, A Stasik, R Stein, J Stettner, A Steuer, T Stezelberger, RG Stokstad, A Stossl, NL Strotjohann, T Stuttard, GW Sullivan, M Sutherland, I Taboada, J Tatar, F Tenholt, S Ter-Antonyan, A Terliuk, S Tilav, PA Toale, MN Tobin, C Toennis, S Toscano, D Tosi, M Tselengidou, CF Tung, A Turcati, CF Turley, B Ty, E Unger, M Usner, J Vandenbroucke, W Van Driessche, D van Eijk, N van Eijndhoven, S Vanheule, J van Santen, E Vogel, M Vraeghe, C Walck, A Wallace, M Wallraff, FD Wandler, N Wandkowsky, A Waza, C Weaver, MJ Weiss, C Wendt, J Werthebach, S Westerhoff, BJ Whelan, K Wiebe, CH Wiebusch, L Wille, DR Williams, L Wills, M Wolf, J Wood, TR Wood, E Woolsey, K Woschnagg, DL Xu, XW Xu, Y Xu, JP Yanez, G Yodh, S Yoshida, T Yuan, I Collaboration


Electron acceleration by wave turbulence in a magnetized plasma

Nature Physics 14 (2018) 475-479

Y Kuramitsu, DQ Lamb, S Lebedev, JR Marques, F Miniati, T Morita, M Oliver, B Reville, Y Sakawa, S Sarkar, C Spindloe, R Trines, P Tzeferacos, LO Silva, R Bingham, M Koenig, G Gregori

© 2018 The Author(s). Astrophysical shocks are commonly revealed by the non-thermal emission of energetic electrons accelerated in situ 1-3 . Strong shocks are expected to accelerate particles to very high energies 4-6 ; however, they require a source of particles with velocities fast enough to permit multiple shock crossings. While the resulting diffusive shock acceleration 4 process can account for observations, the kinetic physics regulating the continuous injection of non-thermal particles is not well understood. Indeed, this injection problem is particularly acute for electrons, which rely on high-frequency plasma fluctuations to raise them above the thermal pool 7,8 . Here we show, using laboratory laser-produced shock experiments, that, in the presence of a strong magnetic field, significant electron pre-heating is achieved. We demonstrate that the key mechanism in producing these energetic electrons is through the generation of lower-hybrid turbulence via shock-reflected ions. Our experimental results are analogous to many astrophysical systems, including the interaction of a comet with the solar wind 9, a setting where electron acceleration via lower-hybrid waves is possible.


Measurement of Atmospheric Neutrino Oscillations at 6-56 GeV with IceCube DeepCore.

Physical Review Letters 120 (2018) 071801-071801

MG Aartsen, M Ackermann, J Adams, JA Aguilar, M Ahlers, M Ahrens, I Al Samarai, D Altmann, K Andeen, T Anderson, I Ansseau, G Anton, C Argüelles, J Auffenberg, S Axani, H Bagherpour, X Bai, JP Barron, SW Barwick, V Baum, R Bay, JJ Beatty, J Becker Tjus, K-H Becker, S BenZvi, D Berley, E Bernardini, DZ Besson, G Binder, D Bindig, E Blaufuss, S Blot, C Bohm, M Börner, F Bos, D Bose, S Böser, O Botner, J Bourbeau, F Bradascio, J Braun, L Brayeur, M Brenzke, H-P Bretz, S Bron, J Brostean-Kaiser, A Burgman, T Carver, J Casey, M Casier, E Cheung, D Chirkin, A Christov, K Clark, L Classen, S Coenders, GH Collin, JM Conrad, DF Cowen, R Cross, M Day, JPAM de André, C De Clercq, JJ DeLaunay, H Dembinski, S De Ridder, P Desiati, KD de Vries, G de Wasseige, M de With, T DeYoung, JC Díaz-Vélez, V di Lorenzo, H Dujmovic, JP Dumm, M Dunkman, B Eberhardt, T Ehrhardt, B Eichmann, P Eller, PA Evenson, S Fahey, AR Fazely, J Felde, K Filimonov, C Finley, S Flis, A Franckowiak, E Friedman, T Fuchs, TK Gaisser, J Gallagher, L Gerhardt, K Ghorbani, W Giang, T Glauch, T Glüsenkamp, A Goldschmidt, JG Gonzalez, D Grant, Z Griffith, C Haack, A Hallgren, F Halzen, K Hanson, D Hebecker, D Heereman, K Helbing, R Hellauer, S Hickford, J Hignight, GC Hill, KD Hoffman, R Hoffmann, B Hokanson-Fasig, K Hoshina, F Huang, M Huber, K Hultqvist, M Hünnefeld, S In, A Ishihara, E Jacobi, GS Japaridze, M Jeong, K Jero, BJP Jones, P Kalaczynski, W Kang, A Kappes, T Karg, A Karle, U Katz, M Kauer, A Keivani, JL Kelley, A Kheirandish, J Kim, M Kim, T Kintscher, J Kiryluk, T Kittler, SR Klein, G Kohnen, R Koirala, H Kolanoski, L Köpke, C Kopper, S Kopper, JP Koschinsky, DJ Koskinen, M Kowalski, K Krings, M Kroll, G Krückl, J Kunnen, S Kunwar, N Kurahashi, T Kuwabara, A Kyriacou, M Labare, JL Lanfranchi, MJ Larson, F Lauber, D Lennarz, M Lesiak-Bzdak, M Leuermann, QR Liu, L Lu, J Lünemann, W Luszczak, J Madsen, G Maggi, KBM Mahn, S Mancina, R Maruyama, K Mase, R Maunu, F McNally, K Meagher, M Medici, M Meier, T Menne, G Merino, T Meures, S Miarecki, J Micallef, G Momenté, T Montaruli, RW Moore, M Moulai, R Nahnhauer, P Nakarmi, U Naumann, G Neer, H Niederhausen, SC Nowicki, DR Nygren, A Obertacke Pollmann, A Olivas, A O'Murchadha, T Palczewski, H Pandya, DV Pankova, P Peiffer, JA Pepper, C Pérez de Los Heros, D Pieloth, E Pinat, M Plum, PB Price, GT Przybylski, C Raab, L Rädel, M Rameez, K Rawlins, IC Rea, R Reimann, B Relethford, M Relich, E Resconi, W Rhode, M Richman, S Robertson, M Rongen, C Rott, T Ruhe, D Ryckbosch, D Rysewyk, T Sälzer, SE Sanchez Herrera, A Sandrock, J Sandroos, S Sarkar, S Sarkar, K Satalecka, P Schlunder, T Schmidt, A Schneider, S Schoenen, S Schöneberg, L Schumacher, D Seckel, S Seunarine, J Soedingrekso, D Soldin, M Song, GM Spiczak, C Spiering, J Stachurska, M Stamatikos, T Stanev, A Stasik, J Stettner, A Steuer, T Stezelberger, RG Stokstad, A Stößl, NL Strotjohann, GW Sullivan, M Sutherland, I Taboada, J Tatar, F Tenholt, S Ter-Antonyan, A Terliuk, G Tešić, S Tilav, PA Toale, MN Tobin, S Toscano, D Tosi, M Tselengidou, CF Tung, A Turcati, CF Turley, B Ty, E Unger, M Usner, J Vandenbroucke, W Van Driessche, N van Eijndhoven, S Vanheule, J van Santen, M Vehring, E Vogel, M Vraeghe, C Walck, A Wallace, M Wallraff, FD Wandler, N Wandkowsky, A Waza, C Weaver, MJ Weiss, C Wendt, J Werthebach, S Westerhoff, BJ Whelan, K Wiebe, CH Wiebusch, L Wille, DR Williams, L Wills, M Wolf, J Wood, TR Wood, E Woolsey, K Woschnagg, DL Xu, XW Xu, Y Xu, JP Yanez, G Yodh, S Yoshida, T Yuan, M Zoll

We present a measurement of the atmospheric neutrino oscillation parameters using three years of data from the IceCube Neutrino Observatory. The DeepCore infill array in the center of IceCube enables the detection and reconstruction of neutrinos produced by the interaction of cosmic rays in Earth's atmosphere at energies as low as ∼5  GeV. That energy threshold permits measurements of muon neutrino disappearance, over a range of baselines up to the diameter of the Earth, probing the same range of L/E_{ν} as long-baseline experiments but with substantially higher-energy neutrinos. This analysis uses neutrinos from the full sky with reconstructed energies from 5.6 to 56 GeV. We measure Δm_{32}^{2}=2.31_{-0.13}^{+0.11}×10^{-3}  eV^{2} and sin^{2}θ_{23}=0.51_{-0.09}^{+0.07}, assuming normal neutrino mass ordering. These results are consistent with, and of similar precision to, those from accelerator- and reactor-based experiments.


Is dark matter self-interacting?

NATURE ASTRONOMY 2 (2018) 856-857

S Sarkar


Analytical estimates of proton acceleration in laser-produced turbulent plasmas

Journal of Plasma Physics Cambridge University Press (CUP) (2018)

K Beyer, B Reville, A Bott, H-S Park, S Sarkar, G Gregori

With the advent of high power lasers, new opportunities have opened up for simulating astrophysical processes in the laboratory. We show that 2nd-order Fermi acceleration can be directly investigated at the National Ignition Facility, Livermore. This requires measuring the momentum-space diffusion of 3 MeV protons produced within a turbulent plasma generated by a laser. Treating Fermi acceleration as a biased diffusion process, we show analytically that a measurable broadening of the initial proton distribution is then expected for particles exiting the plasma.


REVIEW OF PARTICLE PHYSICS Particle Data Group

(2018) ARTN 030001

M Tanabashi, PD Grp, K Hagiwara, K Hikasa, K Nakamura, Y Sumino, F Takahashi, J Tanaka, K Agashe, G Aielli, C Amsler, M Antonelli, DM Asner, H Baer, S Banerjee, RM Barnett, T Basaglia, CW Bauer, JJ Beatty, VI Belousov, J Beringer, S Bethke, A Bettini, H Bichsel, O Biebel, KM Black, E Blucher, O Buchmuller, V Burkert, MA Bychkov, RN Cahn, M Carena, A Ceccucci, A Cerri, D Chakraborty, M-C Chen, RS Chivukula, G Cowan, O Dahl, G D'Ambrosio, T Damour, D de Florian, A de Gouvea, T DeGrand, P de Jong, G Dissertori, BA Dobrescu, M D'Onofrio, M Doser, M Drees, HK Dreiner, DA Dwyer, P Eerola, S Eidelman, J Ellis, J Erler, VV Ezhela, W Fetscher, BD Fields, R Firestone, B Foster, A Freitas, H Gallagher, L Garren, H-J Gerber, G Gerbier, T Gershon, Y Gershtein, T Gherghetta, AA Godizov, M Goodman, C Grab, AV Gritsan, C Grojean, DE Groom, M Grunewald, A Gurtu, T Gutsche, HE Haber, C Hanhart, S Hashimoto, Y Hayato, KG Hayes, A Hebecker, S Heinemeyer, B Heltsley, JJ Hernandez-Rey, J Hisano, A Hocker, J Holder, A Holtkamp, T Hyodo, KD Irwin, KF Johnson, M Kado, M Karliner, UF Katz, SR Klein, E Klempt, RV Kowalewski, F Krauss, M Kreps, B Krusche, YV Kuyanov, Y Kwon, O Lahav, J Laiho, J Lesgourgues, A Liddle, Z Ligeti, C-J Lin, C Lippmann, TM Liss, L Littenberg, KS Lugovsky, SB Lugovsky, A Lusiani, Y Makida, F Maltoni, T Mannel, AV Manohar, WJ Marciano, AD Martin, A Masoni, J Matthews, U-G Meissner, D Milstead, RE Mitche, K Moenig, P Molaro, F Moortgat, M Moskovic, H Murayama, M Narain, P Nason, S Navas, M Neubert, P Nevski, Y Nir, KA Olive, SP Griso, J Parsons, C Patrignani, JA Peacock, M Pennington, ST Petcov, VA Petrov, E Pianori, A Piepke, A Pomarol, A Quadt, J Rademacker, G Raffelt, BN Ratcliff, P Richardson, A Ringwald, S Roesler, S Rolli, A Romaniouk, LJ Rosenberg, JL Rosner, G Rybka, RA Ryutin, CT Sachrajda, Y Sakai, GP Salam, S Sarkar, F Sauli, O Schneider, K Scholberg, AJ Schwartz, D Scott, V Sharma, SR Sharpe, T Shutt, M Silari, T Sjostrand, P Skands, T Skwarnicki, JG Smith, GF Smoot, S Spanier, H Spieler, C Spiering, A Stah, SL Stone, T Sumiyoshi, MJ Syphers, K Terashi, J Terning, U Thoma, RS Thorne, L Tiator, M Titov, NP Tkachenko, NA Tornqvist, DR Tovey, G Valencia, R Van de Water, N Varelas, G Venanzoni, L Verde, MG Vincter, P Voge, A Vogt, SP Wakely, W Walkowiak, CW Walter, D Wands, DR Ward, MO Wascko, G Weiglein, DH Weinberg, EJ Weinberg, M White, LR Wiencke, S Willocq, CC Woh, J Womersley, CL Woody, RL Workman, W-M Yao, GP Zeller, OV Zenin, R-Y Zhu, S-L Zhu, F Zimmermann, PA Zyla, J Anderson, L Fuller, VS Lugovsky, P Schaffner


Probing the Time Structure of the Quark-Gluon Plasma with Top Quarks.

Physical review letters 120 (2018) 232301-

L Apolinário, JG Milhano, GP Salam, CA Salgado

The tiny droplets of quark gluon plasma (QGP) created in high-energy nuclear collisions experience fast expansion and cooling with a lifetime of a few fm/c. Despite the information provided by probes such as jet quenching and quarkonium suppression, and the excellent description by hydrodynamical models, direct access to the time evolution of the system remains elusive. We point out that the study of hadronically decaying W bosons, notably in events with a top-antitop quark pair, can provide key novel insight into the time structure of the QGP. This is because of a unique feature, namely a time delay between the moment of the collision and that when the W-boson decay products start interacting with the medium. Furthermore, the length of the time delay can be constrained by selecting specific reconstructed top-quark momenta. We carry out a Monte Carlo feasibility study and find that the LHC has the potential to bring first limited information on the time structure of the QGP. Substantially increased LHC heavy-ion luminosities or future higher-energy colliders would open opportunities for more extensive studies.


Astrophysical neutrinos and cosmic rays observed by IceCube

ADVANCES IN SPACE RESEARCH 62 (2018) 2902-2930

MG Aartsen, M Ackermann, J Adams, JA Aguilar, M Ahlers, M Ahrens, D Altmann, K Andeen, T Anderson, I Ansseau, G Anton, M Archinger, C Arguelles, J Auffenberg, S Axani, X Bai, SW Barwick, V Baum, R Bay, JJ Beatty, JB Tjus, K-H Becker, S BenZvi, D Berley, E Bernardini, A Bernhard, DZ Besson, G Binder, D Bindig, M Bissok, E Blaufuss, S Blot, C Bohm, M Boerner, F Bos, D Bose, S Boeser, O Botner, J Braun, L Brayeur, H-P Bretz, S Bron, A Burgman, T Carver, M Casier, E Cheung, D Chirkin, A Christov, K Clark, L Classen, S Coenders, GH Collin, JM Conrad, DF Cowen, R Cross, M Day, JPAM de Andre, C De Clercq, EDP Rosendo, H Dembinski, S De Ridder, P Desiati, KD de Vries, G de Wasseige, M de With, T de Young, JC Diaz-Velez, V di Lorenzo, H Dujmovic, JP Dumm, M Dunkman, B Eberhardt, T Ehrhardt, B Eichmann, P Eller, S Euler, PA Evenson, S Fahey, AR Fazely, J Feintzeig, J Felde, K Filimonov, C Finley, S Flis, C-C Foesig, A Franckowiak, E Friedman, T Fuchs, TK Gaisser, J Gallagher, L Gerhardt, K Ghorbani, W Giang, L Gladstone, T Glauch, T Gluesenkamp, A Goldschmidt, JG Gonzalez, D Grant, Z Griffith, C Haack, A Hallgren, F Halzen, E Hansen, T Hansmann, K Hanson, D Hebecker, D Heereman, K Helbing, R Hellauer, S Hickford, J Hignight, GC Hill, KD Hoffman, R Hoffmann, K Holzapfel, K Hoshina, F Huang, M Huber, K Hultqvist, S In, A Ishihara, E Jacobi, GS Japaridze, M Jeong, K Jero, BJP Jones, M Jurkovic, W Kang, A Kappes, T Karg, A Karle, U Katz, M Kauer, A Keivani, JL Kelley, A Kheirandish, J Kim, M Kim, T Kintscher, J Kiryluk, T Kittler, SR Klein, G Kohnen, R Koirala, H Kolanoski, R Konietz, L Koepke, C Kopper, S Kopper, DJ Koskinen, M Kowalski, K Krings, M Kroll, G Krueckl, C Kruger, J Kunnen, S Kunwar, N Kurahashi, T Kuwabara, M Labare, JL Lanfranchi, MJ Larson, F Lauber, D Lennarz, M Lesiak-Bzdak, M Leuermann, L Lu, J Lunemann, J Madsen, G Maggi, KBM Mahn, S Mancina, M Mandelartz, R Maruyama, K Mase, R Maunu, F McNally, K Meagher, M Medici, M Meier, A Meli, T Menne, G Merino, T Meures, S Miarecki, T Montaruli, M Moulai, R Nahnhauer, U Naumann, G Neer, H Niederhausen, SC Nowicki, DR Nygren, AO Pollmann, A Olivas, A O'Murchadha, T Palczewski, H Pandya, DV Pankova, P Peiffer, O Penek, JA Pepper, CP de los Heros, D Pielothu, E Pinat, PB Price, GT Przybylski, M Quinnan, C Raab, L Raedel, M Rameez, K Rawlins, R Reimann, B Relethford, M Relich, E Resconi, W Rhode, M Richman, B Riedel, S Robertson, M Rongen, C Rott, T Ruhe, D Ryckbosch, D Rysewyk, L Sabbatini, SES Herrera, A Sandrock, J Sandroos, S Sarkar, K Satalecka, P Schlunder, T Schmidt, S Schoenen, S Schoeneberg, L Schumacher, D Seckel, S Seunarine, D Soldin, M Song, GM Spiczak, C Spiering, T Stanev, A Stasik, J Stettner, A Steuer, T Stezelberger, RG Stokstad, A Stossl, R Strom, NL Strotjohann, GW Sullivan, M Sutherland, H Taavola, I Taboada, J Tatar, F Tenholti, S Ter-Antonyan, A Terliuk, G Tesic, S Tilav, PA Toale, MN Tobin, S Toscano, D Tosi, M Tselengidou, A Turcati, E Unger, M Usner, J Vandenbroucke, N van Eijndhoven, S Vanheule, M van Rossem, J van Santen, J Veenkamp, M Vehring, M Voge, E Vogel, M Vraeghe, C Walck, A Wallace, M Wallraff, N Wandkowsky, C Weaver, MJ Weiss, C Wendt, S Westerhoff, BJ Whelan, S Wickmann, K Wiebe, CH Wiebusch, L Wille, DR Williams, L Wills, M Wolf, TR Wood, E Woolsey, K Woschnagg, DL Xu, XW Xu, Y Xu, JP Yanez, G Yodh, S Yoshida, M Zoll


Logarithmic accuracy of parton showers: a fixed-order study

JOURNAL OF HIGH ENERGY PHYSICS (2018) ARTN 033

M Dasgupta, FA Dreyer, K Hamilton, PF Monni, GP Salam


Joint constraints on Galactic diffuse neutrino emission from ANTARES and IceCube

Astrophysical Journal Letters American Astronomical Society 868 (2018) L20-L20

A Albert, M André, M Anghinolfi, M Ardid, J-J Aubert, J Aublin, T Avgitas, B Baret, J Barrios-Martí, S Basa, B Belhorma, V Bertin, S Biagi, R Bormuth, J Boumaaza, S Bourret, MC Bouwhuis, H Brânzaş, R Bruijn, J Brunner, J Busto, A Capone, L Caramete, J Carr, S Celli, M Chabab, RCE Moursli, T Chiarusi, M Circella, JAB Coelho, A Coleiro, M Colomer, R Coniglione, H Costantini, P Coyle, A Creusot, AF Díaz, A Deschamps, C Distefano, ID Palma, A Domi, C Donzaud, D Dornic, D Drouhin, T Eberl, IE Bojaddaini, NE Khayati, D Elsässer, A Enzenhöfer, A Ettahiri, F Fassi, I Felis, P Fermani, G Ferrara, L Fusco, P Gay, H Glotin, T Grégoire, RG Ruiz, K Graf, S Hallmann, HV Haren, AJ Heijboer, Y Hello, JJ Hernández-Rey, J Hößl, J Hofestädt, G Illuminati, CW James, MD Jong, M Jongen, M Kadler, O Kalekin, U Katz, NR Khan-Chowdhury, A Kouchner, M Kreter, I Kreykenbohm, V Kulikovskiy, C Lachaud, R Lahmann, D Lefèvre, E Leonora, G Levi, M Lotze, S Loucatos, M Marcelin, A Margiotta, A Marinelli, JA Martínez-Mora, R Mele, K Melis, P Migliozzi, A Moussa, S Navas, E Nezri, A Nuñez, M Organokov, GE Păvălaş, C Pellegrino, P Piattelli, V Popa, T Pradier, L Quinn, C Racca, N Randazzo, G Riccobene, A Sánchez-Losa, M Saldaña, I Salvadori, DFE Samtleben, M Sanguineti, P Sapienza, F Schüssler, M Spurio, T Stolarczyk, M Taiuti, Y Tayalati, A Trovato, B Vallage, VV Elewyck, F Versari, D Vivolo, J Wilms, D Zaborov, JD Zornoza, J Zúñiga, MG Aartsen, M Ackermann, J Adams, JA Aguilar, M Ahlers, M Ahrens, IA Samarai, D Altmann, K Andeen, T Anderson, I Ansseau, G Anton, C Argüelles, J Auffenberg, S Axani, P Backes, H Bagherpour, X Bai, A Barbano, JP Barron, SW Barwick, V Baum, R Bay, JJ Beatty, JB Tjus, K-H Becker, S BenZvi, D Berley, E Bernardini, DZ Besson, G Binder, D Bindig, E Blaufuss, S Blot, C Bohm, M Börner, F Bos, S Böser, O Botner, E Bourbeau, J Bourbeau, F Bradascio, J Braun, M Brenzke, H-P Bretz, S Bron, J Brostean-Kaiser, A Burgman, RS Busse, T Carver, E Cheung, D Chirkin, A Christov, K Clark, L Classen, GH Collin, JM Conrad, P Coppin, P Correa, DF Cowen, R Cross, P Dave, M Day, JPAMD André, CD Clercq, JJ DeLaunay, H Dembinski, K Deoskar, SD Ridder, P Desiati, KDD Vries, GD Wasseige, MD With, T DeYoung, JC Díaz-Vélez, VD Lorenzo, H Dujmovic, JP Dumm, M Dunkman, E Dvorak, B Eberhardt, T Ehrhardt, B Eichmann, P Eller, PA Evenson, S Fahey, AR Fazely, J Felde, K Filimonov, C Finley, A Franckowiak, E Friedman, A Fritz, TK Gaisser, J Gallagher, E Ganster, L Gerhardt, K Ghorbani, W Giang, T Glauch, T Glüsenkamp, A Goldschmidt, JG Gonzalez, D Grant, Z Griffith, C Haack, A Hallgren, L Halve, F Halzen, K Hanson, D Hebecker, D Heereman, K Helbing, R Hellauer, S Hickford, J Hignight, GC Hill, KD Hoffman, R Hoffmann, T Hoinka, B Hokanson-Fasig, K Hoshina, F Huang, M Huber, K Hultqvist, M Hünnefeld, R Hussain, S In, N Iovine, A Ishihara, E Jacobi, GS Japaridze, M Jeong, K Jero, BJP Jones, P Kalaczynski, W Kang, A Kappes, D Kappesser, T Karg, A Karle, U Katz, M Kauer, A Keivani, JL Kelley, A Kheirandish, J Kim, T Kintscher, J Kiryluk, T Kittler, SR Klein, R Koirala, H Kolanoski, L Köpke, C Kopper, S Kopper, JP Koschinsky, DJ Koskinen, M Kowalski, K Krings, M Kroll, G Krückl, S Kunwar, N Kurahashi, A Kyriacou, M Labare, JL Lanfranchi, MJ Larson, F Lauber, K Leonard, M Leuermann, QR Liu, E Lohfink, CJL Mariscal, L Lu, J Lünemann, W Luszczak, J Madsen, G Maggi, KBM Mahn, Y Makino, S Mancina, R Maruyama, K Mase, R Maunu, K Meagher, M Medici, M Meier, T Menne, G Merino, T Meures, S Miarecki, J Micallef, G Momenté, T Montaruli, RW Moore, M Moulai, R Nagai, R Nahnhauer, P Nakarmi, U Naumann, G Neer, H Niederhausen, SC Nowicki, DR Nygren, AO Pollmann, A Olivas, A O'Murchadha, E O'Sullivan, T Palczewski, H Pandya, DV Pankova, P Peiffer, JA Pepper, CPDL Heros, D Pieloth, E Pinat, A Pizzuto, M Plum, PB Price, GT Przybylski, C Raab, M Rameez, L Rauch, K Rawlins, IC Rea, R Reimann, B Relethford, E Resconi, W Rhode, M Richman, S Robertson, M Rongen, C Rott, T Ruhe, D Ryckbosch, D Rysewyk, I Safa, SES Herrera, A Sandrock, J Sandroos, M Santander, S Sarkar, S Sarkar, K Satalecka, M Schaufel, P Schlunder, T Schmidt, A Schneider, S Schöneberg, L Schumacher, S Sclafani, D Seckel, S Seunarine, J Soedingrekso, D Soldin, M Song, GM Spiczak, C Spiering, J Stachurska, M Stamatikos, T Stanev, A Stasik, R Stein, J Stettner, A Steuer, T Stezelberger, RG Stokstad, A Stößl, NL Strotjohann, T Stuttard, GW Sullivan, M Sutherland, I Taboada, F Tenholt, S Ter-Antonyan, A Terliuk, S Tilav, PA Toale, MN Tobin, C Tönnis, S Toscano, D Tosi, M Tselengidou, CF Tung, A Turcati, CF Turley, B Ty, E Unger, MAU Elorrieta, M Usner, J Vandenbroucke, WV Driessche, DV Eijk, NV Eijndhoven, S Vanheule, JV Santen, M Vraeghe, C Walck, A Wallace, M Wallraff, FD Wandler, N Wandkowsky, TB Watson, A Waza, C Weaver, MJ Weiss, C Wendt, J Werthebach, S Westerhoff, BJ Whelan, N Whitehorn, K Wiebe, CH Wiebusch, L Wille, DR Williams, L Wills, M Wolf, J Wood, TR Wood, E Woolsey, K Woschnagg, G Wrede, DL Xu, XW Xu, Y Xu, JP Yanez, G Yodh, S Yoshida, T Yuan, D Gaggero, D Grasso

The existence of diffuse Galactic neutrino production is expected from cosmic ray interactions with Galactic gas and radiation fields. Thus, neutrinos are a unique messenger offering the opportunity to test the products of Galactic cosmic ray interactions up to energies of hundreds of TeV. Here we present a search for this production using ten years of ANTARES track and shower data, as well as seven years of IceCube track data. The data are combined into a joint likelihood test for neutrino emission according to the KRA$_\gamma$ model assuming a 5 PeV per nucleon Galactic cosmic ray cutoff. No significant excess is found. As a consequence, the limits presented in this work start constraining the model parameter space for Galactic cosmic ray production and transport.


Can black hole superradiance be induced by galactic plasmas?

Physics Letters B Elsevier BV (2018)

JP Conlon, CAR Herdeiro

Highly spinning Kerr black holes with masses $M = 1 - 100\ M_{\odot}$ are subject to an efficient superradiant instability in the presence of bosons with masses $\mu \sim 10^{-10} - 10^{-12}\ {\rm eV}$. We observe that this matches the effective plasma-induced photon mass in diffuse galactic or intracluster environments ($\omega_{\rm pl} \sim 10^{-10} - 10^{-12}\ {\rm eV}$). This suggests that bare Kerr black holes within galactic or intracluster environments, possibly even including the ones produced in recently observed gravitational wave events, are unstable to formation of a photon cloud that may contain a significant fraction of the mass of the original black hole. At maximal efficiency, the instability timescale for a massive vector is milliseconds, potentially leading to a transient rate of energy extraction from a black hole in principle as large as $\sim 10^{55} \ {\rm erg \, s}^{-1}$. We discuss possible astrophysical effects this could give rise to, including a speculative connection to Fast Radio Bursts.


The string soundscape at gravitational wave detectors

PHYSICS LETTERS B 779 (2018) 348-352

I Garcia Garcia, S Krippendorf, J March-Russell


Reconstruction of a direction-dependent primordial power spectrum from Planck CMB data

Journal of Cosmology and Astroparticle Physics 2018 (2018)

A Durakovic, P Hunt, S Mukherjee, S Sarkar, T Souradeep

© 2018 IOP Publishing Ltd and Sissa Medialab. We consider the possibility that the primordial curvature perturbation is direction-dependent. To first order this is parameterised by a quadrupolar modulation of the power spectrum and results in statistical anisotropy of the CMB, which can be quantified using 'bipolar spherical harmonics'. We compute these for the Planck DR2-2015 SMICA map and estimate the noise covariance from Planck Full Focal Plane 9 simulations. A constant quadrupolar modulation is detected with 2.2 σ significance, dropping to 2σ when the primordial power is assumed to scale with wave number k as a power law. Going beyond previous work we now allow the spectrum to have arbitrary scale-dependence. Our non-parametric reconstruction then suggests several spectral features, the most prominent at k ∼ 0.006 Mpc-1. When a constant quadrupolar modulation is fitted to data in the range 0.005 ≤ k/Mpc-1≤ 0.008, its preferred directions are found to be related to the cosmic hemispherical asymmetry and the CMB dipole. To determine the significance we apply two test statistics to our reconstructions of the quadrupolar modulation from data, against reconstructions of realisations of noise only. With a test statistic sensitive only to the amplitude of the modulation, the reconstructions from the multipole range 30 ≤ ℓ ≤ 1200 are unusual with 2.1σ significance. With the second test statistic, sensitive also to the direction, the significance rises to 6.9σ. Our approach is easily generalised to include other data sets such as polarisation, large-scale structure and forthcoming 21-cm line observations which will enable these anomalies to be investigated further.

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