Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA

P. W. Gorham; J. Nam; A. Romero-Wolf; S. Hoover; P. Allison; O. Banerjee; J. J. Beatty; K. Belov; D. Z. Besson; W. R. Binns; V. Bugaev; P. Cao; C. Chen; P. Chen; J. M. Clem; A. Connolly; B. Dailey; C. Deaconu; L. Cremonesi; P. F. Dowkontt; M. A. Duvernois; R. C. Field; B. D. Fox; D. Goldstein; J. Gordon; C. Hast; C. L. Hebert; B. Hill; K. Hughes; R. Hupe; M. H. Israel; A. Javaid; J. Kowalski; J. Lam; J. G. Learned; K. M. Liewer; T. C. Liu; J. T. Link; E. Lusczek; S. Matsuno; B. C. Mercurio; C. Miki; P. Miočinović; M. Mottram; K. Mulrey; C. J. Naudet; J. Ng; R. J. Nichol; K. Palladino; B. F. Rauch; ANITA Collaboration

doi:10.1103/PhysRevLett.117.071101

Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA

P. W. Gorham, J. Nam, A. Romero-Wolf, S. Hoover, P. Allison, O. Banerjee, J. J. Beatty, K. Belov, D. Z. Besson, W. R. Binns, V. Bugaev, P. Cao, C. Chen, P. Chen, J. M. Clem, A. Connolly, B. Dailey, C. Deaconu, L. Cremonesi, P. F. DowkonttM. A. Duvernois, R. C. Field, B. D. Fox, D. Goldstein, J. Gordon, C. Hast, C. L. Hebert, B. Hill, K. Hughes, R. Hupe, M. H. Israel, A. Javaid, J. Kowalski, J. Lam, J. G. Learned, K. M. Liewer, T. C. Liu, J. T. Link, E. Lusczek, S. Matsuno, B. C. Mercurio, C. Miki, P. Miočinović, M. Mottram, K. Mulrey, C. J. Naudet, J. Ng, R. J. Nichol, K. Palladino, B. F. Rauch, ANITA Collaboration

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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.

Original language	English (US)
Article number	071101
Journal	Physical review letters
Volume	117
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.117.071101
State	Published - Aug 8 2016

Bibliographical note

Funding Information:
We thank NASA for their generous support of ANITA, the Columbia Scientific Balloon Facility for their excellent field support, and the National Science Foundation for their Antarctic operations support. This work was also supported by the U.S. Department of Energy, High Energy Physics Division.

Publisher Copyright:
© 2016 American Physical Society.

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10.1103/PhysRevLett.117.071101

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Gorham, P. W., Nam, J., Romero-Wolf, A., Hoover, S., Allison, P., Banerjee, O., Beatty, J. J., Belov, K., Besson, D. Z., Binns, W. R., Bugaev, V., Cao, P., Chen, C., Chen, P., Clem, J. M., Connolly, A., Dailey, B., Deaconu, C., Cremonesi, L., ... ANITA Collaboration (2016). Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA. Physical review letters, 117(7), Article 071101. https://doi.org/10.1103/PhysRevLett.117.071101

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 & ANITA Collaboration 2016, 'Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA', Physical review letters, vol. 117, no. 7, 071101. https://doi.org/10.1103/PhysRevLett.117.071101

@article{66b119994b414e1382f94902edcc4776,

title = "Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA",

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.",

author = "Gorham, {P. W.} and J. Nam and A. Romero-Wolf and S. Hoover and P. Allison and O. Banerjee and Beatty, {J. J.} and K. Belov and Besson, {D. Z.} and Binns, {W. R.} and V. Bugaev and P. Cao and C. Chen and P. Chen and Clem, {J. M.} and A. Connolly and B. Dailey and C. Deaconu and L. Cremonesi and Dowkontt, {P. F.} and Duvernois, {M. A.} and Field, {R. C.} and Fox, {B. D.} and D. Goldstein and J. Gordon and C. Hast and Hebert, {C. L.} and B. Hill and K. Hughes and R. Hupe and Israel, {M. H.} and A. Javaid and J. Kowalski and J. Lam and Learned, {J. G.} and Liewer, {K. M.} and Liu, {T. C.} and Link, {J. T.} and E. Lusczek and S. Matsuno and Mercurio, {B. C.} and C. Miki and P. Mio{\v c}inovi{\'c} and M. Mottram and K. Mulrey and Naudet, {C. J.} and J. Ng and Nichol, {R. J.} and K. Palladino and Rauch, {B. F.} and {ANITA Collaboration}",

note = "Funding Information: We thank NASA for their generous support of ANITA, the Columbia Scientific Balloon Facility for their excellent field support, and the National Science Foundation for their Antarctic operations support. This work was also supported by the U.S. Department of Energy, High Energy Physics Division. Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

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doi = "10.1103/PhysRevLett.117.071101",

language = "English (US)",

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T1 - Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA

AU - Gorham, P. W.

AU - Nam, J.

AU - Romero-Wolf, A.

AU - Hoover, S.

AU - Allison, P.

AU - Banerjee, O.

AU - Beatty, J. J.

AU - Belov, K.

AU - Besson, D. Z.

AU - Binns, W. R.

AU - Bugaev, V.

AU - Cao, P.

AU - Chen, C.

AU - Chen, P.

AU - Clem, J. M.

AU - Connolly, A.

AU - Dailey, B.

AU - Deaconu, C.

AU - Cremonesi, L.

AU - Dowkontt, P. F.

AU - Duvernois, M. A.

AU - Field, R. C.

AU - Fox, B. D.

AU - Goldstein, D.

AU - Gordon, J.

AU - Hast, C.

AU - Hebert, C. L.

AU - Hill, B.

AU - Hughes, K.

AU - Hupe, R.

AU - Israel, M. H.

AU - Javaid, A.

AU - Kowalski, J.

AU - Lam, J.

AU - Learned, J. G.

AU - Liewer, K. M.

AU - Liu, T. C.

AU - Link, J. T.

AU - Lusczek, E.

AU - Matsuno, S.

AU - Mercurio, B. C.

AU - Miki, C.

AU - Miočinović, P.

AU - Mottram, M.

AU - Mulrey, K.

AU - Naudet, C. J.

AU - Ng, J.

AU - Nichol, R. J.

AU - Palladino, K.

AU - Rauch, B. F.

AU - ANITA Collaboration

N1 - Funding Information: We thank NASA for their generous support of ANITA, the Columbia Scientific Balloon Facility for their excellent field support, and the National Science Foundation for their Antarctic operations support. This work was also supported by the U.S. Department of Energy, High Energy Physics Division. Publisher Copyright: © 2016 American Physical Society.

PY - 2016/8/8

Y1 - 2016/8/8

N2 - 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.

AB - 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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Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA

Abstract

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