Constraints on the ultrahigh-energy cosmic neutrino flux from the fourth flight of ANITA

Gorham, P. W.; Allison, P.; Banerjee, O.; Batten, L.; Beatty, J. J.; Belov, K.; Besson, D.; Binns, W. R.; Bugaev, V.; Cao, Pinlu; Chen, C. H.; Chen, P.; Chen, Y.; Clem, J.; Connolly, A.; Cremonesi, L.; Dailey, B.; Deaconu, C.; Dowkontt, P. F.; Fox, B. D.; Gordon, J.; Hast, C.; Hill, B.; Hsu, Shih-Ying; Huang, J. J.; Hughes, K.; Hupe, R.; Israel, M. H.; Liewer, K. M.; Liu, T. C.; Ludwig, Andrew; Macchiarulo, L.; Matsuno, S.; McBride, K.; Miki, C.; Mulrey, K.; Nam, J. W.; Naudet, C. J.; Nichol, R. J.; Novikov, Alexander; Oberla, E.; Prohira, S.; Rauch, B. F.; Řípa, J.; Roberts, Jason; Romero-Wolf, A.; Rotter, B.; Russell, John Wellesley; Saltzberg, D.; Seckel, D.; Schoorlemmer, H.; Shiao, Judith Shu-Chu; Stafford, S.; Stockham, J.; Stockham, M.; Strutt, B.; Sutherland, M.; Varner, G.; Vieregg, A. G.; Wang, N.; Wang, S. H.; Wissel, S.

doi:10.1103/physrevd.99.122001

Cited by 86 publications

(112 citation statements)

References 32 publications

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“…The Antarctic Impulsive Transient Antenna (ANITA) collaboration has recently reported two anomalous upward-going ultra-high energy cosmic ray (UHECR) air shower events with deposited shower energies of 0.6 ± 0.4 EeV and 0.56 +0. 3 −0.2 EeV, respectively [1,2]. Both events, one from ANITA-I [1] and another from ANITA-III [2], originate from well below the horizon, with elevation angles of (−27.4 ± 0.3) • and (−35.0 ± 0.3) • , respectively.…”

Section: Introductionmentioning

confidence: 96%

“…3 −0.2 EeV, respectively [1,2]. Both events, one from ANITA-I [1] and another from ANITA-III [2], originate from well below the horizon, with elevation angles of (−27.4 ± 0.3) • and (−35.0 ± 0.3) • , respectively. They do not exhibit phase inversion due to Earth's geomagnetic effects -a primary characteristic of conventional downgoing UHECR air showers which produce downgoing radio impulses that are reflected off the Antarctic ice surface.…”

Section: Introductionmentioning

confidence: 96%

“…This corresponds to the combination of 17.25, 28.5 and 7 days of effective full-payload exposure time for ANITA-I, ANITA-II and ANITA-III, respectively, based on the experimental analysis given in Refs [1,2,44]…”

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confidence: 99%

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R -parity violating supersymmetric explanation of the anomalous events at ANITA

Collins

Dev²,

Sui³

2019

Phys. Rev. D

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The ANITA balloon experiment has observed two EeV-energy, upgoing events originating from well below the horizon. This is puzzling, because (i) no Standard Model (SM) particle is expected to survive passage through Earth at such energies and incident angles, and (ii) no such events were reported by IceCube. In this paper, we address both these issues by invoking a beyond SM interpretation of the EeV events as due to the decay of a long-lived bino in the R-parity violating (RPV) supersymmetry. In particular, a TeV-scale slepton/squark can be resonantly produced through the interaction of the EeV neutrino with electrons/nucleons inside Earth, that decays to a light, longlived bino, which survives the propagation through Earth matter before decaying back to neutrinos, leptons and/or quarks, thus producing upgoing air showers in the atmosphere near ANITA. We find that the ANITA events can be explained with a GeV-scale bino and O(0.1) RPV couplings, which are consistent with all existing high and low-energy constraints. We also find that an isotropic neutrino flux is inadequate for a beyond the SM explanation of this kind, and an anisotropic flux must be invoked. Finally, we also address the apparent tension of these observations with IceCube. Various aspects of our interpretation are testable in the near future at different frontiers, such as by the LHC, Belle II, ANITA-IV and IceCube.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

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R -parity violating supersymmetric explanation of the anomalous events at ANITA

Collins

Dev²,

Sui³

2019

Phys. Rev. D

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“…The latter are designed to detect the radiation in the MHz-GHz frequency range generated in ν-induced showers from the excess charge that develops in showers, first discussed by Askaryan in 1962 [18]. Despite all of these efforts neutrinos have escaped detection in the EeV energy range by existing experiments using these techniques [19][20][21][22]. About three orders of magnitude in energy below, in the 100 TeV to PeV range, the IceCube experiment has detected with high confidence a flux of astrophysical neutrinos [7,8], including evidence of an energetic neutrino from a direction consistent with blazar TXS 0506+056 in temporal coincidence with a flaring state [23].…”

Section: Introductionmentioning

confidence: 99%

Askaryan radiation from neutrino-induced showers in ice

et al. 2020

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We present a semi-analytical method for the calculation of coherent Askaryan radiation in showers induced by neutrinos of any flavor in ice. We compare our results with those of a full Monte Carlo simulation based on the ZHAireS code. This approach is able to reproduce the vector potential and hence electric field at any experimentally relevant observer position in the time domain. This work extends published results only valid for electron-induced showers. We establish the validity of the semi-analytical calculation of the radio signal produced by all types of neutrino-induced showers in ice. The method is computationally efficient and only requires as inputs the longitudinal charge excess profile of the showers and a parameterization of the vector potential in the far-field region of the shower at the Cherenkov angle that we also provide. Our methodology avoids tracking the contributions to the electric field from millions of particles every time the radio pulse has to be calculated at a given observer position. These results can be readily used in the interpretation of the data taken by experiments, and in the planning and design of future initiatives based on the radio technique in ice.

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“…Above the Earth, proposed satellite-based instruments sensitive to upward-going air showers include CHANT [14] and POEMMA [15]. The balloonborne ANITA detector [16][17][18][19] is sensitive to neutrino interactions in the Antarctic ice where the Askaryan effect is important. ANITA is also sensitive to tau neutrino charged current interactions in the Earth that produce taus that decay in the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Anomalous ANITA air shower events and tau decays

et al. 2019

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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. We find that for up-going 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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Constraints on the ultrahigh-energy cosmic neutrino flux from the fourth flight of ANITA

Cited by 86 publications

References 32 publications

R -parity violating supersymmetric explanation of the anomalous events at ANITA

R -parity violating supersymmetric explanation of the anomalous events at ANITA

Askaryan radiation from neutrino-induced showers in ice

Anomalous ANITA air shower events and tau decays

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