Observation of Seven Astrophysical Tau Neutrino Candidates with IceCube

R Abbasi¹, M Ackermann², J Adams³, S K Agarwalla⁴, J A Aguilar⁵, M Ahlers⁶, J M Alameddine⁷, N M Amin⁸, K Andeen⁹, G Anton¹⁰, C Argüelles¹¹, Y Ashida¹², S Athanasiadou², S N Axani⁸, X Bai¹³, V A Balagopal⁴, M Baricevic⁴, S W Barwick¹⁴, V Basu⁴, R Bay¹⁵, J J Beatty^{16

17}, J Becker Tjus¹⁸, J Beise¹⁹, C Bellenghi²⁰, C Benning²¹, S BenZvi²², D Berley²³, E Bernardini²⁴, D Z Besson²⁵, E Blaufuss²³, S Blot², F Bontempo²⁶, J Y Book¹¹, C Boscolo Meneguolo²⁴, S Böser²⁷, O Botner¹⁹, J Böttcher²¹, E Bourbeau⁶, J Braun⁴, B Brinson²⁸, J Brostean-Kaiser², R T Burley²⁹, R S Busse³⁰, D Butterfield⁴, M A Campana³¹, K Carloni¹¹, E G Carnie-Bronca²⁹, S Chattopadhyay⁴, N Chau⁵, C Chen²⁸, Z Chen³², D Chirkin⁴, S Choi³³, B A Clark²³, L Classen³⁰, A Coleman¹⁹, G H Collin³⁴, A Connolly^{16

17}, J M Conrad³⁴, P Coppin³⁵, P Correa³⁵, D F Cowen^{36

37}, P Dave²⁸, C De Clercq³⁵, J J DeLaunay³⁸, D Delgado¹¹, S Deng²¹, K Deoskar³⁹, A Desai⁴, P Desiati⁴, K D de Vries³⁵, G de Wasseige⁴⁰, T DeYoung⁴¹, A Diaz³⁴, J C Díaz-Vélez⁴, M Dittmer³⁰, A Domi¹⁰, H Dujmovic⁴, M A DuVernois⁴, T Ehrhardt²⁷, P Eller²⁰, E Ellinger⁴², S El Mentawi²¹, D Elsässer⁷, R Engel^{26

43}, H Erpenbeck⁴, J Evans²³, P A Evenson⁸, K L Fan²³, K Fang⁴, K Farrag⁴⁴, A R Fazely⁴⁵, N Feigl⁴⁶, S Fiedlschuster¹⁰, A T Fienberg³⁷, C Finley³⁹, L Fischer², D Fox³⁶, A Franckowiak¹⁸, A Fritz²⁷, P Fürst²¹, J Gallagher⁴⁷, E Ganster²¹, A Garcia¹¹, L Gerhardt⁴⁸, A Ghadimi³⁸, C Glaser¹⁹, T Glauch²⁰, T Glüsenkamp^{10

19}, N Goehlke⁴³, J G Gonzalez⁸, S Goswami³⁸, D Grant⁴¹, S J Gray²³, O Gries²¹, S Griffin⁴, S Griswold²², K M Groth⁶, C Günther²¹, P Gutjahr⁷, C Haack¹⁰, A Hallgren¹⁹, R Halliday⁴¹, L Halve²¹, F Halzen⁴, H Hamdaoui³², M Ha Minh²⁰, K Hanson⁴, J Hardin³⁴, A A Harnisch⁴¹, P Hatch⁴⁹, A Haungs²⁶, K Helbing⁴², J Hellrung¹⁸, F Henningsen²⁰, L Heuermann²¹, N Heyer¹⁹, S Hickford⁴², A Hidvegi³⁹, C Hill⁴⁴, G C Hill²⁹, K D Hoffman²³, S Hori⁴, K Hoshina⁴, W Hou²⁶, T Huber²⁶, K Hultqvist³⁹, M Hünnefeld⁷, R Hussain⁴, K Hymon⁷, S In³³, A Ishihara⁴⁴, M Jacquart⁴, O Janik²¹, M Jansson³⁹, G S Japaridze⁵⁰, M Jeong³³, M Jin¹¹, B J P Jones⁵¹, D Kang²⁶, W Kang³³, X Kang³¹, A Kappes³⁰, D Kappesser²⁷, L Kardum⁷, T Karg², M Karl²⁰, A Karle⁴, U Katz¹⁰, M Kauer⁴, J L Kelley⁴, A Khatee Zathul⁴, A Kheirandish^{52

53}, J Kiryluk³², S R Klein^{15

48}, A Kochocki⁴¹, R Koirala⁸, H Kolanoski⁴⁶, T Kontrimas²⁰, L Köpke²⁷, C Kopper¹⁰, D J Koskinen⁶, P Koundal²⁶, M Kovacevich³¹, M Kowalski^{46

2}, T Kozynets⁶, J Krishnamoorthi⁴, K Kruiswijk⁴⁰, E Krupczak⁴¹, A Kumar², E Kun¹⁸, N Kurahashi³¹, N Lad², C Lagunas Gualda², M Lamoureux⁴⁰, M J Larson²³, S Latseva²¹, F Lauber⁴², J P Lazar^{11

4}, J W Lee³³, K Leonard DeHolton³⁷, A Leszczyńska⁸, M Lincetto¹⁸, Q R Liu⁴, M Liubarska⁵⁴, E Lohfink²⁷, C Love³¹, C J Lozano Mariscal³⁰, F Lucarelli⁵⁵, W Luszczak^{16

17}, Y Lyu^{15

48}, J Madsen⁴, K B M Mahn⁴¹, Y Makino⁴, E Manao²⁰, S Mancina^{4

24}, W Marie Sainte⁴, I C Mariş⁵, S Marka⁵⁶, Z Marka⁵⁶, M Marsee³⁸, I Martinez-Soler¹¹, R Maruyama⁵⁷, F Mayhew⁴¹, T McElroy⁵⁴, F McNally⁵⁸, J V Mead⁶, K Meagher⁴, S Mechbal², A Medina¹⁷, M Meier⁴⁴, Y Merckx³⁵, L Merten¹⁸, J Micallef⁴¹, J Mitchell⁴⁵, T Montaruli⁵⁵, R W Moore⁵⁴, Y Morii⁴⁴, R Morse⁴, M Moulai⁴, T Mukherjee²⁶, R Naab², R Nagai⁴⁴, M Nakos⁴, U Naumann⁴², J Necker², A Negi⁵¹, M Neumann³⁰, H Niederhausen⁴¹, M U Nisa⁴¹, A Noell²¹, A Novikov⁸, S C Nowicki⁴¹, A Obertacke Pollmann⁴⁴, V O'Dell⁴, M Oehler²⁶, B Oeyen⁵⁹, A Olivas²³, R Orsoe²⁰, J Osborn⁴, E O'Sullivan¹⁹, H Pandya⁸, D V Pankova³⁷, N Park⁴⁹, G K Parker⁵¹, E N Paudel⁸, L Paul^{9

13}, C Pérez de Los Heros¹⁹, J Peterson⁴, S Philippen²¹, A Pizzuto⁴, M Plum¹³, A Pontén¹⁹, Y Popovych²⁷, M Prado Rodriguez⁴, B Pries⁴¹, R Procter-Murphy²³, G T Przybylski⁴⁸, C Raab⁴⁰, J Rack-Helleis²⁷, K Rawlins⁶⁰, Z Rechav⁴, A Rehman⁸, P Reichherzer¹⁸, G Renzi⁵, E Resconi²⁰, S Reusch², W Rhode⁷, B Riedel⁴, A Rifaie²¹, E J Roberts²⁹, S Robertson^{15

48}, S Rodan³³, G Roellinghoff³³, M Rongen¹⁰, C Rott^{12

33}, T Ruhe⁷, L Ruohan²⁰, D Ryckbosch⁵⁹, I Safa^{11

4}, J Saffer⁴³, D Salazar-Gallegos⁴¹, P Sampathkumar²⁶, S E Sanchez Herrera⁴¹, A Sandrock⁴², M Santander³⁸, S Sarkar⁵⁴, S Sarkar⁶¹, J Savelberg²¹, P Savina⁴, M Schaufel²¹, H Schieler²⁶, S Schindler¹⁰, L Schlickmann²¹, B Schlüter³⁰, F Schlüter⁵, N Schmeisser⁴², T Schmidt²³, J Schneider¹⁰, F G Schröder^{26

8}, L Schumacher¹⁰, G Schwefer²¹, S Sclafani²³, D Seckel⁸, M Seikh²⁵, S Seunarine⁶², R Shah³¹, A Sharma¹⁹, S Shefali⁴³, N Shimizu⁴⁴, M Silva⁴, B Skrzypek¹¹, B Smithers⁵¹, R Snihur⁴, J Soedingrekso⁷, A Søgaard⁶, D Soldin⁴³, P Soldin²¹, G Sommani¹⁸, C Spannfellner²⁰, G M Spiczak⁶², M Stamatikos¹⁷, T Stanev⁸, T Stezelberger⁴⁸, T Stürwald⁴², T Stuttard⁶, G W Sullivan²³, I Taboada²⁸, S Ter-Antonyan⁴⁵, M Thiesmeyer²¹, W G Thompson¹¹, J Thwaites⁴, S Tilav⁸, K Tollefson⁴¹, C Tönnis³³, S Toscano⁵, D Tosi⁴, A Trettin², C F Tung²⁸, R Turcotte²⁶, J P Twagirayezu⁴¹, B Ty⁴, M A Unland Elorrieta³⁰, A K Upadhyay⁴, K Upshaw⁴⁵, N Valtonen-Mattila¹⁹, J Vandenbroucke⁴, N van Eijndhoven³⁵, D Vannerom³⁴, J van Santen², J Vara³⁰, J Veitch-Michaelis⁴, M Venugopal²⁶, M Vereecken⁴⁰, S Verpoest⁸, D Veske⁵⁶, A Vijai²³, C Walck³⁹, C Weaver⁴¹, P Weigel³⁴, A Weindl²⁶, J Weldert³⁷, A Y Wen¹¹, C Wendt⁴, J Werthebach⁷, M Weyrauch²⁶, N Whitehorn⁴¹, C H Wiebusch²¹, N Willey⁴¹, D R Williams³⁸, L Witthaus⁷, A Wolf²¹, M Wolf²⁰, G Wrede¹⁰, X W Xu⁴⁵, J P Yanez⁵⁴, E Yildizci⁴, S Yoshida⁴⁴, R Young²⁵, F Yu¹¹, S Yu⁴¹, Z Zhang³², P Zhelnin¹¹, P Zilberman⁴, M Zimmerman⁴; IceCube Collaboration

Affiliations

¹ Department of Physics, Loyola University Chicago, Chicago, Illinois 60660, USA.
² Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany.
³ Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand.
⁴ Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
⁵ Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium.
⁶ Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark.
⁷ Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany.
⁸ Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA.
⁹ Department of Physics, Marquette University, Milwaukee, Wisconsin 53201, USA.
¹⁰ Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany.
¹¹ Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, Massachusetts 02138, USA.
¹² Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA.
¹³ Physics Department, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA.
¹⁴ Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
¹⁵ Department of Physics, University of California, Berkeley, California 94720, USA.
¹⁶ Department of Astronomy, Ohio State University, Columbus, Ohio 43210, USA.
¹⁷ Department of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210, USA.
¹⁸ Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
¹⁹ Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden.
²⁰ Physik-department, Technische Universität München, D-85748 Garching, Germany.
²¹ III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany.
²² Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA.
²³ Department of Physics, University of Maryland, College Park, Maryland 20742, USA.
²⁴ Dipartimento di Fisica e Astronomia Galileo Galilei, Università Degli Studi di Padova, 35122 Padova PD, Italy.
²⁵ Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA.
²⁶ Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany.
²⁷ Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany.
²⁸ School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
²⁹ Department of Physics, University of Adelaide, Adelaide, 5005, Australia.
³⁰ Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany.
³¹ Department of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, USA.
³² Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA.
³³ Department of Physics, Sungkyunkwan University, Suwon 16419, Korea.
³⁴ Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
³⁵ Vrije Universiteit Brussel (VUB), Dienst ELEM, B-1050 Brussels, Belgium.
³⁶ Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
³⁷ Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
³⁸ Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487, USA.
³⁹ Oskar Klein Centre and Department of Physics, Stockholm University, SE-10691 Stockholm, Sweden.
⁴⁰ Centre for Cosmology, Particle Physics and Phenomenology-CP3, Université catholique de Louvain, Louvain-la-Neuve, Belgium.
⁴¹ Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
⁴² Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany.
⁴³ Karlsruhe Institute of Technology, Institute of Experimental Particle Physics, D-76021 Karlsruhe, Germany.
⁴⁴ Department of Physics and The International Center for Hadron Astrophysics, Chiba University, Chiba 263-8522, Japan.
⁴⁵ Department of Physics, Southern University, Baton Rouge, Louisiana 70813, USA.
⁴⁶ Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany.
⁴⁷ Department of Astronomy, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
⁴⁸ Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
⁴⁹ Department of Physics, Engineering Physics, and Astronomy, Queen's University, Kingston, Ontario K7L 3N6, Canada.
⁵⁰ CTSPS, Clark-Atlanta University, Atlanta, Georgia 30314, USA.
⁵¹ Department of Physics, University of Texas at Arlington, 502 Yates St., Science Hall Rm 108, Box 19059, Arlington, Texas 76019, USA.
⁵² Department of Physics & Astronomy, University of Nevada, Las Vegas, Nevada, 89154, USA.
⁵³ Nevada Center for Astrophysics, University of Nevada, Las Vegas, Nevada 89154, USA.
⁵⁴ Department of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1.
⁵⁵ Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland.
⁵⁶ Columbia Astrophysics and Nevis Laboratories, Columbia University, New York, New York 10027, USA.
⁵⁷ Department of Physics, Yale University, New Haven, Connecticut 06520, USA.
⁵⁸ Department of Physics, Mercer University, Macon, Georgia 31207-0001, USA.
⁵⁹ Department of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium.
⁶⁰ Department of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, Alaska 99508, USA.
⁶¹ Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
⁶² Department of Physics, University of Wisconsin, River Falls, Wisconsin 54022, USA.

PMID: 38682982
DOI: 10.1103/PhysRevLett.132.151001

Observation of Seven Astrophysical Tau Neutrino Candidates with IceCube

R Abbasi et al. Phys Rev Lett. 2024.

. 2024 Apr 12;132(15):151001.

doi: 10.1103/PhysRevLett.132.151001.

Authors

Affiliations

¹ Department of Physics, Loyola University Chicago, Chicago, Illinois 60660, USA.
² Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany.
³ Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand.
⁴ Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
⁵ Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium.
⁶ Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark.
⁷ Department of Physics, TU Dortmund University, D-44221 Dortmund, Germany.
⁸ Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA.
⁹ Department of Physics, Marquette University, Milwaukee, Wisconsin 53201, USA.
¹⁰ Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany.
¹¹ Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, Massachusetts 02138, USA.
¹² Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA.
¹³ Physics Department, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA.
¹⁴ Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
¹⁵ Department of Physics, University of California, Berkeley, California 94720, USA.
¹⁶ Department of Astronomy, Ohio State University, Columbus, Ohio 43210, USA.
¹⁷ Department of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210, USA.
¹⁸ Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
¹⁹ Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden.
²⁰ Physik-department, Technische Universität München, D-85748 Garching, Germany.
²¹ III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany.
²² Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA.
²³ Department of Physics, University of Maryland, College Park, Maryland 20742, USA.
²⁴ Dipartimento di Fisica e Astronomia Galileo Galilei, Università Degli Studi di Padova, 35122 Padova PD, Italy.
²⁵ Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA.
²⁶ Karlsruhe Institute of Technology, Institute for Astroparticle Physics, D-76021 Karlsruhe, Germany.
²⁷ Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany.
²⁸ School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
²⁹ Department of Physics, University of Adelaide, Adelaide, 5005, Australia.
³⁰ Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany.
³¹ Department of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, USA.
³² Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA.
³³ Department of Physics, Sungkyunkwan University, Suwon 16419, Korea.
³⁴ Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
³⁵ Vrije Universiteit Brussel (VUB), Dienst ELEM, B-1050 Brussels, Belgium.
³⁶ Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
³⁷ Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
³⁸ Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487, USA.
³⁹ Oskar Klein Centre and Department of Physics, Stockholm University, SE-10691 Stockholm, Sweden.
⁴⁰ Centre for Cosmology, Particle Physics and Phenomenology-CP3, Université catholique de Louvain, Louvain-la-Neuve, Belgium.
⁴¹ Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
⁴² Department of Physics, University of Wuppertal, D-42119 Wuppertal, Germany.
⁴³ Karlsruhe Institute of Technology, Institute of Experimental Particle Physics, D-76021 Karlsruhe, Germany.
⁴⁴ Department of Physics and The International Center for Hadron Astrophysics, Chiba University, Chiba 263-8522, Japan.
⁴⁵ Department of Physics, Southern University, Baton Rouge, Louisiana 70813, USA.
⁴⁶ Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany.
⁴⁷ Department of Astronomy, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
⁴⁸ Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
⁴⁹ Department of Physics, Engineering Physics, and Astronomy, Queen's University, Kingston, Ontario K7L 3N6, Canada.
⁵⁰ CTSPS, Clark-Atlanta University, Atlanta, Georgia 30314, USA.
⁵¹ Department of Physics, University of Texas at Arlington, 502 Yates St., Science Hall Rm 108, Box 19059, Arlington, Texas 76019, USA.
⁵² Department of Physics & Astronomy, University of Nevada, Las Vegas, Nevada, 89154, USA.
⁵³ Nevada Center for Astrophysics, University of Nevada, Las Vegas, Nevada 89154, USA.
⁵⁴ Department of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1.
⁵⁵ Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland.
⁵⁶ Columbia Astrophysics and Nevis Laboratories, Columbia University, New York, New York 10027, USA.
⁵⁷ Department of Physics, Yale University, New Haven, Connecticut 06520, USA.
⁵⁸ Department of Physics, Mercer University, Macon, Georgia 31207-0001, USA.
⁵⁹ Department of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium.
⁶⁰ Department of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, Alaska 99508, USA.
⁶¹ Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
⁶² Department of Physics, University of Wisconsin, River Falls, Wisconsin 54022, USA.

PMID: 38682982
DOI: 10.1103/PhysRevLett.132.151001

Abstract

We report on a measurement of astrophysical tau neutrinos with 9.7 yr of IceCube data. Using convolutional neural networks trained on images derived from simulated events, seven candidate ν_{τ} events were found with visible energies ranging from roughly 20 TeV to 1 PeV and a median expected parent ν_{τ} energy of about 200 TeV. Considering backgrounds from astrophysical and atmospheric neutrinos, and muons from π^{±}/K^{±} decays in atmospheric air showers, we obtain a total estimated background of about 0.5 events, dominated by non-ν_{τ} astrophysical neutrinos. Thus, we rule out the absence of astrophysical ν_{τ} at the 5σ level. The measured astrophysical ν_{τ} flux is consistent with expectations based on previously published IceCube astrophysical neutrino flux measurements and neutrino oscillations.

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Observation of Seven Astrophysical Tau Neutrino Candidates with IceCube

Affiliations

Observation of Seven Astrophysical Tau Neutrino Candidates with IceCube

Authors

Affiliations

Abstract