IceCube high-energy starting event sample: Description and flux characterization with 7.5 years of data

著者: R. Abbasi, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, Cyril Martin Alispach, A. A. Alves, N. M. Amin, K. Andeen, T. Anderson, I. Ansseau, G. Anton, C. Argüelles, Spencer Axani, X. Bai, Aswathi Balagopal, Anastasia Maria Barbano, S. W. Barwick, Benjamin Bastian, Vedant Basu, V. Baum, S. Baur, R. Bay, J. J. Beatty, K. Becker, J. Becker Tjus, Chiara Bellenghi, S. BenZvi, D. Berley, E. Bernardini, D. Besson, G. Binder, D. Bindig, E. Blaufuss, Summer Blot, S. Böser, O. Botner, J. Böttcher, Etienne Bourbeau, J. Bourbeau, Federica Bradascio, J. Braun, S. Bron, Jannes Brostean-Kaiser, A. Burgman, Raffaela Busse, Michael Campana, C. Chen, D. Chirkin, S. Choi, Brian Clark, K. Clark, Lew Classen, Alan Coleman, G. H. Collin, J. M. Conrad, Paul Coppin, Pablo Correa, D. F. Cowen, R. Cross, Pranav Dave, C. De Clercq, James DeLaunay, H.-P. Dembinski, Kunal Deoskar, S. De Ridder, Abhishek Desai, P. Desiati, K. D. de Vries, G. de Wasseige, M. de With, T. DeYoung, Sukeerthi Dharani, A. Diaz, J. C. Díaz–Vélez, Hrvoje Dujmović, M. Dunkman, M. A. DuVernois, Emily Dvorak, Thomas Ehrhardt, P. Eller, R. Engel, John Evans, P. A. Evenson, S. Fahey, A. R. Fazely, Sebastian Fiedlschuster, Aaron Fienberg, K. Filimonov, C. Finley, Leander Fischer, D. B. Fox, A. Franckowiak, Edward Friedman, Alexander Fritz, Philipp Fürst, T. K. Gaisser, J. S. Gallagher, Erik Ganster, S. Garrappa, L. Gerhardt, L. Gerhardt, Theo Glauch, T. Glüsenkamp, A. Goldschmidt, J. G. González, Sreetama Goswami, D. Grant, T. Grégoire, Z. Griffith, Spencer Griswold, Mehmet Gündüz, Christian Haack, A. Hallgren, R. Halliday, L. Halve, F. Halzen, Martin Ha Minh, K. Hanson, John Hardin, A. Haungs, Simon Hauser, D. Hebecker, K. Helbing, Felix Henningsen, S. Hickford, J. Hignight, Colton Hill, G. C. Hill, K. D. Hoffman, R. Hoffmann, Tobias Hoinka, Benjamin Hokanson-Fasig, K. Hoshina, F. Huang, M. E. Huber, Thomas Huber, K. Hultqvist, Mirco Hünnefeld, Raamis Hussain, S. In, N. Iovine, A. Ishihara, Matti Jansson, G. S. Japaridze, Minjin Jeong, B. J. P. Jones, R. Joppe, Donghwa Kang, Woosik Kang, X. Kang, A. Kappes, David Kappesser, T. Karg, Martina Karl, A. Karle, T. Katori, U. Katz, M. Kauer, Moritz Kellermann, J. L. Kelley, Ali Kheirandish, J. Kim, Ken'ichi Kin, T. Kintscher, J. Kiryluk, S. R. Klein, Ramesh Koirala, H. Kolanoski, L. Köpke, Claudio Kopper, S. Kopper, D. J. Koskinen, Paras Koundal, Michael Kovacevich, M. Kowalski, K. Krings, G. Krückl, N. Kulacz, N. Kurahashi, A. Kyriacou, Cristina Lagunas Gualda, J. L. Lanfranchi, M. J. Larson, Frederik Hermann Lauber, Jeffrey Lazar, K. Leonard, Agnieszka Leszczyńska, Y. Li, Qinrui Liu, Elisa Lohfink, C. J. Lozano Mariscal, L. Lu, Francesco Lucarelli, Andrew Ludwig, William Luszczak, Y. Lyu, W. Y., J. Madsen, K. B. M. Mahn, Yuya Makino, P. Mallik, Sarah Mancina, Shivesh Mandalia, Ioana Codrina Mariş, R. Maruyama, K. Mase, Frank McNally, K. Meagher, Andrés Medina, Maximilian Meier, S. Meighen-Berger, J. Merz, Jessie Micallef, D. Mockler, G. Momenté, T. Montaruli, R. W. Moore, R. Morse, Marjon Moulai, Richard Naab, R. Nagai, Uwe Naumann, Jannis Necker, G. Neer, Le Viet Nguyen, Hans Niederhausen, M. U. Nisa, Sarah Nowicki, D. R. Nygren, A. Obertacke Pollmann, M. Oehler, A. Olivas, Erin O’Sullivan, Hershal Pandya, D. V. Pankova, N. Park, Grant Parker, Ek Narayan Paudel, P. Peiffer, C. Pérez de los Heros, Saskia Philippen, D. Pieloth, Sarah Pieper, A. Pizzuto, M. Plum, Yuriy Popovych, Alessio Porcelli, Maria Prado Rodriguez, P. B. Price, G. T. Przybylski, Christoph Raab, Amirreza Raissi, M. Rameez, K. Rawlins, I. C. Rea, Abdul Rehman, R. Reimann, M. Renschler, Giovanni Renzi, E. Resconi, Simeon Reusch, W. Rhode, M. Richman, Benedikt Riedel, S. Robertson, Gerrit Roellinghoff, Martin Rongen, C. Rott, T. Ruhe, D. Ryckbosch, Devyn Rysewyk Cantu, I. Safa, S. E. Sanchez Herrera, Alexander Sandrock, J. Sandroos, M. Santander, S. Sarkar, S. Sarkar, K. Satalecka, Maximilian Karl Scharf, Merlin Schaufel, H. Schieler, P. Schlunder, T. Schmidt, A. Schneider, Judith Schneider, Frank Schröder, L. Schumacher, S. Sclafani, D. Seckel, S. Seunarine, S. Shefali, M. Silva, B. Smithers, R. Snihur, Jan Soedingrekso, Dennis Soldin, G. M. Spiczak, C. Spiering, Juliana Stachurska, M. Stamatikos, Todor Stanev, Robert Stein, J. Stettner, A. Steuer, T. Stezelberger, R. G. Stokstad, N. L. Strotjohann, Thomas Stuttard, G. W. Sullivan, I. Taboada, F. Tenholt, S. Ter–Antonyan, S. Tilav, Franziska Tischbein, Kirsten Tollefson, Lenka Tomankova, Christoph Tönnis, S. Toscano, D. Tosi, Alexander Trettin, M. Tselengidou, C. F. Tung, A. Turcati, Roxanne Turcotte, Colin Turley, Jean Pierre Twagirayezu, B. Ty, E. Unger, Martin Unland Elorrieta, J. Vandenbroucke, D. van Eijk, N. van Eijndhoven, D. Vannerom, J. V. Santen, Stef Verpoest, M. Vraeghe, C. Walck, A. Wallace, N. Wandkowsky, T. B. Watson, Ch. Weaver, A. Weindl, Matthew J. Weiss, Jan Weldert, Chris Wendt, Johannes Werthebach, Mark Weyrauch, B. J. Whelan, N. Whitehorn, K. Wiebe, C. H. Wiebusch, D. R. Williams, Martin Wolf, T. R. Wood, K. Woschnagg, Gerrit Wrede, Johan Wilfried Wulff, Xiaolin Xu, Y. Xu, J. P. Yanez, S. Yoshida, Tony Yuan, Z. Zhang - Physical review. D/Physical review. D. 2021 被引用: 373

The IceCube Neutrino Observatory has established the existence of a high-energy all-sky neutrino flux of astrophysical origin. This discovery was made using events interacting within a fiducial region of the detector surrounded by an active veto and with reconstructed energy above 60 TeV, commonly known as the high-energy starting event sample (HESE). We revisit the analysis of the HESE sample with an additional 4.5 years of data, newer glacial ice models, and improved systematics treatment. This paper describes the sample in detail, reports on the latest astrophysical neutrino flux measurements, and presents a source search for astrophysical neutrinos. We give the compatibility of these observations with specific isotropic flux models proposed in the literature as well as generic power-law-like scenarios. Assuming ${\ensuremath{\nu}}_{e}:{\ensuremath{\nu}}_{\ensuremath{\mu}}:{\ensuremath{\nu}}_{\ensuremath{\tau}}=1:1:1$, and an equal flux of neutrinos and antineutrinos, we find that the astrophysical neutrino spectrum is compatible with an unbroken power law, with a preferred spectral index of ${2.87}_{\ensuremath{-}0.19}^{+0.20}$ for the 68% confidence interval.