2021•Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)Open access

IceCube Search for Earth-traversing ultra-high energy Neutrinos

Ibrahim Safa, Rasha Abbasi, Markus Ackermann, Jenni Adams, Juanan Aguilar, M. Ahlers, Maryon Ahrens, Cyril Martin Alispach, Antonio Augusto Alves Junior, Najia Moureen Binte Amin, Rui An, K. Andeen, Tyler B. Anderson, G. Anton, Carlos A. Argüelles, Yosuke Ashida, Spencer Axani, X. Bai, Aswathi Balagopal V, Anastasia Maria Barbano, S. W. Barwick, Benjamin Bastian, Vedant Basu, S. Baur, Ryan Carlton Bay, J. J. Beatty, K.-H. Becker, Julia Becker Tjus, Chiara Bellenghi, S. BenZvi, D. Berley, E. Bernardini, D. Z. Besson, G. Binder, D. Bindig, E. Blaufuss, Summer Blot, Matthias Boddenberg, Federico Bontempo, Jurgen Borowka, S. Böser, O. Botner, Jakob Boettcher, Etienne Bourbeau, Federica Bradascio, James Robert Braun, S. Bron, Jannes Brostean-Kaiser, Sally-Ann Browne, A. Burgman, Ryan T. Burley, Raffaela Busse, Michael G. Campana, Erin Carnie-Bronca, Chujie Chen, D. Chirkin, Koun Choi, Brian A. Clark, Kenneth Clark, Lew Classen, Alan Coleman, Gabriel Collin, Janet M. Conrad, Paul Coppin, Pablo Correa, D. F. Cowen, Robert M. Cross, Christian Dappen, Pranav Dave, C. De Clercq, James DeLaunay, H.-P. Dembinski, Kunal Deoskar, Sam De Ridder, Abhishek A. Desai, P. Desiati, Krijn D. de Vries, G. de Wasseige, Meike De With, T. DeYoung, Sukeerthi Dharani, A. Diaz, Juan Carlos Diaz-Velez, Markus Dittmer, Hrvoje Dujmovic, M. Dunkman, M. A. DuVernois, Emily Dvorak, Thomas Ehrhardt, P. Eller, Ralph Engel, Hannah Erpenbeck, John Evans, Paul A. Evenson, Kwok Lung Fan, A. R. Fazely, Sebastian Fiedlschuster, Aaron T. Fienberg, Kirill Filimonov, Chad Finley, Leander Fischer, DEREK B. FOX, A. Franckowiak, Elizabeth Friedman, Alexander Fritz, Philipp Fürst, T. K. Gaisser, J. S. Gallagher, Erik Ganster, Alfonso Garcia, S. Garrappa, L. Gerhardt, Ava Ghadimi, Christian Gläser, Theo Glauch, Thorsten Glusenkamp, A. Goldschmidt, Javier M. González, Sreetama Goswami, Darren P. Grant, T. Grégoire, Spencer Griswold, Mehmet Şirin Gündüz, Christoph G. Günther, Christian Haack, A. Hallgren, R. Halliday, L. Halve, F. Halzen, Martin Ha Minh, K. Hanson, John Hardin, Alexander Harnisch, Andreas Haungs, Simon Hauser, D. Hebecker, K. Helbing, Felix Henningsen, Emma C. Hettinger, Stephanie Hickford, Joshua Hignight, Colton Hill, Gary C. Hill, Kara Hoffman, Ruth Hoffmann, Tobias Hoinka, Benjamin Hokanson-Fasig, K. Hoshina, Feifei Huang, Matthias Huber, Thomas Huber, K. Hultqvist, Mirco Hünnefeld, Raamis Hussain, Seongjin In, N. Iovine, A. Ishihara, Matti Jansson, George Japaridze, Minjin Jeong, B. J. P. Jones, Donghwa Kang, Woosik Kang, Xinyue Kang, Alexander Kappes, David Kappesser, T. Karg, Martina Karl, ALBRECHT KARLE, Uli F. Katz, Matt Kauer, Moritz Kellermann, J. L. Kelley, Ali Kheirandish, Ken'ichi Kin, T. Kintscher, J. Kiryluk, Spencer Klein, Ramesh Koirala, Hermann Kolanoski, Tomas Kontrimas, L. Köpke, Claudio Kopper, Sandro Kopper, D. J. Koskinen, Paras Koundal, Michael Kovacevich, Marek P. Kowalski, Tetiana Kozynets, Emma Kun, Naoko Kurahashi Neilson, Neha Navnitkumar Lad, Cristina Lagunas Gualda, Justin Lanfranchi, M. J. Larson, Frederik Hermann Lauber, Jeffrey Lazar, Jiwoong Lee, Kayla Leonard, Agnieszka Leszczyńska, Yijia Li, Massimiliano Lincetto, Qinrui Liu, Maria Liubarska, Elisa Lohfink, Cristian Jesús Lozano Mariscal, Lu Lü, Francesco Lucarelli, Andrew Ludwig, William Luszczak, Yang Lyu, Wing Yan Ma, James Madsen, K. B. M. Mahn, Yuya Makino, Sarah Mancina, Ioana Codrina Mariş, Reina H. Maruyama, K. Mase, Thomas McElroy, Frank McNally, James Vincent Mead, Kevin J. Meagher, Andrés Medina, Maximilian Meier, Stephan Andrew Meighen-Berger, Jessie Micallef, D. Mockler, T. Montaruli, R. W. Moore, Robert M. Morse, Marjon Moulai, Richard Naab, Ryo Nagai, Uwe Naumann, Jannis Necker, Le Viet Nguyen, Hans Niederhausen, Mehr Un Nisa, Sarah Nowicki, Dave Nygren, Anna Obertacke Pollmann, Marie Oehler, A. Olivas, Erin O'Sullivan, Hershal Pandya, D. V. Pankova, Nahee Park, Grant Parker, Ek Narayan Paudel, Larissa Paul, Carlos Pérez de los Heros, Lilly Peters, Josh Peterson, Saskia Philippen, D. Pieloth, Sarah Pieper, Martin Pittermann, A. Pizzuto, Matthias Plum, Yuiry Popovych, Alessio Porcelli, Maria Prado Rodriguez, P. Buford Price, B. Pries, G. T. Przybylski, Christoph Raab, Amirreza Raissi, M. Rameez, K. Rawlins, Immacolata Carmen Rea, Abdul Rehman, Patrick Reichherzer, R. Reimann, Giovanni Renzi, Elisa Resconi, Simeon Reusch, Wolfgang Rhode, Mike Richman, Benedikt Riedel, Ella Roberts, Sally Robertson, Gerrit Roellinghoff, Martin Rongen, C. Rott, T. Ruhe, D. Ryckbosch, Devyn Rysewyk Cantu, Julian Saffer, Sebastian Sanchez Herrera, Alexander Sandrock, J. Sandroos, Marcos Santander, Subir Sarkar, Sourav Sarkar, Konstancja Satalecka, Maximilian Karl Scharf, Merlin Schaufel, H. Schieler, Sebastian Schindler, Philipp Schlunder, Torsten Claus Schmidt, Austin Schneider, Judith Schneider, Frank Schröder, Lisa Johanna Schumacher, Georg Schwefer, Steve Sclafani, D. Seckel, S. Seunarine, Ankur Sharma, S. Shefali, Manuel Silva, Barbara Skrzypek, Ben Smithers, Robert Snihur, Jan Soedingrekso, Dennis Soldin, Christian Spannfellner, G. M. Spiczak, Christian Spiering, Juliana Stachurska, Michael Stamatikos, Todor Stanev, Robert Stein, J. Stettner, Anna Steuer, T. Stezelberger, Timo Stürwald, Thomas Stuttard, G. W. Sullivan, I. Taboada, F. Tenholt, Samvel Ter-Antonyan, S. Tilav, Franziska Tischbein, Kirsten Tollefson, Lenka Tomankova, Christoph Tönnis, Simona Toscano, Delia Tosi, Alexander Trettin, Maria Tselengidou, Chun Fai Tung, A. Turcati, Roxanne Turcotte, Colin F. Turley, Jean Pierre Twagirayezu, Bunheng Ty, Martin Unland Elorrieta, Nora Valtonen-Mattila, Justin Vandenbroucke, Nick van Eijndhoven, David Vannerom, J. V. Santen, Stef Verpoest, M. Vraeghe, C. Walck, Timothyblake Watson, Chris Weaver, Philip Weigel, Andreas Weindl, Matthew Weiss, Jan Weldert, Chris Wendt, Johannes Werthebach, Mark Weyrauch, N. Whitehorn, C. H. Wiebusch, Dawn G. Williams, Martin Wolf, K. Woschnagg, Gerrit Wrede, Johan Wilfried Wulff, Xianwu Xu, Yiqian Xu, Juan Pablo Yáñez, Shigeru YOSHIDA, Shiqi Yu, Tianlu Yuan, Zelong Zhang

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Abstract

The search for ultra-high energy neutrinos is more than half a century old. While the hunt for these neutrinos has led to major leaps in neutrino physics, including the detection of astrophysical neutrinos, neutrinos at the EeV energy scale remain undetected. Proposed strategies for the future have mostly been focused on direct detection of the first neutrino interaction, or the decay shower of the resulting charged particle. Here we present an analysis that uses, for the first time, an indirect detection strategy for EeV neutrinos. We focus on tau neutrinos that have traversed Earth, and show that they reach the IceCube detector, unabsorbed, at energies greater than 100 TeV for most trajectories. This opens up the search for ultra-high energy neutrinos to the entire sky. We use ten years of IceCube data to perform an analysis that looks for secondary neutrinos in the northern sky, and highlight the promise such a strategy can have in the next generation of experiments when combined with direct detection techniques.

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The search for ultra-high energy neutrinos is more than half a century old. While the hunt for these neutrinos has led to major leaps in neutrino physics, including the detection of astrophysical neutrinos, neutrinos at the EeV energy scale remain undetected. Proposed strategies for the future have mostly been focused on direct detection of the first neutrino interaction, or the decay shower of the resulting charged particle. Here we present an analysis that uses, for the first time, an indirect detection strategy for EeV neutrinos. We focus on tau neutrinos that have traversed Earth, and show that they reach the IceCube detector, unabsorbed, at energies greater than 100 TeV for most trajectories. This opens up the search for ultra-high energy neutrinos to the entire sky. We use ten years of IceCube data to perform an analysis that looks for secondary neutrinos in the northern sky, and highlight the promise such a strategy can have in the next generation of experiments when combined with direct detection techniques.

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Available abstract

The search for ultra-high energy neutrinos is more than half a century old. While the hunt for these neutrinos has led to major leaps in neutrino physics, including the detection of astrophysical neutrinos, neutrinos at the EeV energy scale remain undetected. Proposed strategies for the future have mostly been focused on direct detection of the first neutrino interaction, or the decay shower of the resulting charged particle. Here we present an analysis that uses, for the first time, an indirect detection strategy for EeV neutrinos. We focus on tau neutrinos that have traversed Earth, and show that they reach the IceCube detector, unabsorbed, at energies greater than 100 TeV for most trajectories. This opens up the search for ultra-high energy neutrinos to the entire sky. We use ten years of IceCube data to perform an analysis that looks for secondary neutrinos in the northern sky, and highlight the promise such a strategy can have in the next generation of experiments when combined with direct detection techniques.

Key concepts: Neutrino, Neutrino detector, Physics, Neutrino astronomy, Cosmic neutrino background, Sky, Measurements of neutrino speed, Solar neutrino

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