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Gorham PW, Nam J, Romero-Wolf A, Hoover S, Allison P, Banerjee O, Beatty JJ, Belov K, Besson DZ, Binns WR, Bugaev V, Cao P, Chen C, Chen P, Clem JM, Connolly A, Dailey B, Deaconu C, Cremonesi L, Dowkontt PF, DuVernois MA, Field RC, Fox BD, Goldstein D, Gordon J, Hast C, Hebert CL, Hill B, Hughes K, Hupe R, Israel MH, Javaid A, Kowalski J, Lam J, Learned JG, Liewer KM, Liu TC, Link JT, Lusczek E, Matsuno S, Mercurio BC, Miki C, Miočinović P, Mottram M, Mulrey K, Naudet CJ, Ng J, Nichol RJ, Palladino K, Rauch BF, Reil K, Roberts J, Rosen M, Rotter B, Russell J, Ruckman L, Saltzberg D, Seckel D, Schoorlemmer H, Stafford S, Stockham J, Stockham M, Strutt B, Tatem K, Varner GS, Vieregg AG, Walz D, Wissel SA, Wu F. Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA. Phys Rev Lett 2016; 117:071101. [PMID: 27563945 DOI: 10.1103/physrevlett.117.071101] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Indexed: 06/06/2023]
Abstract
We report on four radio-detected cosmic-ray (CR) or CR-like events observed with the Antarctic Impulsive Transient Antenna (ANITA), a NASA-sponsored long-duration balloon payload. Two of the four were previously identified as stratospheric CR air showers during the ANITA-I flight. A third stratospheric CR was detected during the ANITA-II flight. Here, we report on characteristics of these three unusual CR events, which develop nearly horizontally, 20-30 km above the surface of Earth. In addition, we report on a fourth steeply upward-pointing ANITA-I CR-like radio event which has characteristics consistent with a primary that emerged from the surface of the ice. This suggests a possible τ-lepton decay as the origin of this event, but such an interpretation would require significant suppression of the standard model τ-neutrino cross section.
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Affiliation(s)
- P W Gorham
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - J Nam
- Department of Physics, Graduate Institute of Astrophysics and Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 10617, Taiwan
| | - A Romero-Wolf
- Jet Propulsion Laboratory, Pasadena, California 91109, USA
| | - S Hoover
- Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095, USA
| | - P Allison
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
- Center for Cosmology and Particle Astrophysics, Ohio State University, Columbus, Ohio 43210, USA
| | - O Banerjee
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
| | - J J Beatty
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
- Center for Cosmology and Particle Astrophysics, Ohio State University, Columbus, Ohio 43210, USA
| | - K Belov
- Jet Propulsion Laboratory, Pasadena, California 91109, USA
| | - D Z Besson
- Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA
| | - W R Binns
- Department of Physics, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - V Bugaev
- Department of Physics, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - P Cao
- Department of Physics, University of Delaware, Newark, Delaware 19716, USA
| | - C Chen
- Department of Physics, Graduate Institute of Astrophysics and Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 10617, Taiwan
| | - P Chen
- Department of Physics, Graduate Institute of Astrophysics and Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 10617, Taiwan
| | - J M Clem
- Department of Physics, University of Delaware, Newark, Delaware 19716, USA
| | - A Connolly
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
- Center for Cosmology and Particle Astrophysics, Ohio State University, Columbus, Ohio 43210, USA
| | - B Dailey
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
| | - C Deaconu
- Department of Physics, Enrico Fermi Institute, Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - L Cremonesi
- Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom
| | - P F Dowkontt
- Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095, USA
| | - M A DuVernois
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - R C Field
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - B D Fox
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - D Goldstein
- Department of Physics, University of California, Irvine, California 92697, USA
| | - J Gordon
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
| | - C Hast
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - C L Hebert
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - B Hill
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - K Hughes
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
| | - R Hupe
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
| | - M H Israel
- Department of Physics, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - A Javaid
- Department of Physics, University of Delaware, Newark, Delaware 19716, USA
| | - J Kowalski
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - J Lam
- Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095, USA
| | - J G Learned
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - K M Liewer
- Jet Propulsion Laboratory, Pasadena, California 91109, USA
| | - T C Liu
- Department of Physics, Graduate Institute of Astrophysics and Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 10617, Taiwan
| | - J T Link
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - E Lusczek
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - S Matsuno
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - B C Mercurio
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
| | - C Miki
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - P Miočinović
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - M Mottram
- Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom
| | - K Mulrey
- Department of Physics, University of Delaware, Newark, Delaware 19716, USA
| | - C J Naudet
- Jet Propulsion Laboratory, Pasadena, California 91109, USA
| | - J Ng
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - R J Nichol
- Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom
| | - K Palladino
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
| | - B F Rauch
- Department of Physics, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - K Reil
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - J Roberts
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - M Rosen
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - B Rotter
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - J Russell
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - L Ruckman
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - D Saltzberg
- Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095, USA
| | - D Seckel
- Department of Physics, University of Delaware, Newark, Delaware 19716, USA
| | - H Schoorlemmer
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - S Stafford
- Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
| | - J Stockham
- Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA
| | - M Stockham
- Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA
| | - B Strutt
- Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom
| | - K Tatem
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - G S Varner
- Department of Physics and Astronomy, University of Hawaii, Manoa, Hawaii 96822, USA
| | - A G Vieregg
- Department of Physics, Enrico Fermi Institute, Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - D Walz
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - S A Wissel
- Physics Department, California Polytechnic State University, San Luis Obispo, California 93407, USA
| | - F Wu
- Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095, USA
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