Anomalous ANITA air shower events and tau decays

Chipman, Shoshana; Diesing, Rebecca; Reno, Mary Hall; Sarcevic, Ina

doi:10.1103/PhysRevD.100.063011

Title: Anomalous ANITA air shower events and tau decays

Journal Article · 15 September 2019 · Physical Review D

DOI: https://doi.org/10.1103/PhysRevD.100.063011 · OSTI ID:1595315

Chipman, Shoshana ^[1];

^[2];

^[3]; Sarcevic, Ina ^[4]

Univ. of Chicago, IL (United States); University of Iowa
Univ. of Chicago, IL (United States)
Univ. of Iowa, Iowa City, IA (United States)
Univ. of Arizona, Tucson, AZ (United States)

Two unusual neutrino events in the Antarctic Impulse Transient Antenna (ANITA) appear to have been generated by air showers from a particle emerging from the Earth at angle ~25°–35° above the horizon. We evaluate the effective aperture for ANITA with a simplified detection model to illustrate the features of the angular dependence of expected events for incident standard model tau neutrinos and for sterile neutrinos that mix with tau neutrinos. We apply our sterile neutrino aperture results to a dark matter scenario with long-lived supermassive dark matter that decay to sterile neutrino-like particles. Here, we find that for upgoing air showers from tau decays, from isotropic fluxes of standard model, sterile neutrinos, or other particles that couple to the tau through suppressed weak interaction cross sections cannot be responsible for the unusual events.

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Research Organization:: Univ. of Iowa, Iowa City, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: SC0010113; SC0009913; SC0009913

OSTI ID:: 1595315

Journal Information:: Physical Review D, Journal Name: Physical Review D Journal Issue: 6 Vol. 100; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Anomalous ANITA air shower events and tau decays

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