Can the ANITA anomalous events be due to new physics?

Cline, James M.; Groß, Christian; Xue, Wei

doi:10.1103/physrevd.100.015031

Cited by 30 publications

(24 citation statements)

References 41 publications

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“…Systematic uncertainties are larger in the antiproton channel, although they have been argued to be under control [58]. Recently, an explanation of the excess as originating from annihilations of pNGB DM has also been proposed [25]. As the situation has not settled yet, we do not show antiproton results here.…”

Section: Pseudo Nambu-goldstone Boson Dark Mattercontrasting

confidence: 52%

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A global view of the off-shell Higgs portal

2020

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We study for the first time the collider reach on the derivative Higgs portal, the leading effective interaction that couples a pseudo Nambu-Goldstone boson (pNGB) scalar Dark Matter to the Standard Model. We focus on Dark Matter pair production through an off-shell Higgs boson, which is analyzed in the vector boson fusion channel. A variety of future high-energy lepton colliders as well as hadron colliders are considered, including CLIC, a muon collider, the High-Luminosity and High-Energy versions of the LHC, and FCC-hh. Implications on the parameter space of pNGB Dark Matter are discussed. In addition, we give improved and extended results for the collider reach on the marginal Higgs portal, under the assumption that the new scalars escape the detector, as motivated by a variety of beyond the Standard Model scenarios. *

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Section: Pseudo Nambu-goldstone Boson Dark Mattercontrasting

confidence: 52%

“…See Refs. [19][20][21][22][23][24][25][26][27][28] for recent studies of models built following this approach.…”

Section: Introductionmentioning

confidence: 99%

A global view of the off-shell Higgs portal

2020

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“…Our results are consistent with those of Ref. [26] and others [29,38]. Our quantitative evaluation of the exit probabilities for τ 's from sterile neutrino interactions in the Earth demonstrates that even with no flux attenuation in the Earth, the lack of events at lower elevation angles makes even a large isotropic flux of sterile neutrinos a poor candidate source of the ANITA unusual events.…”

Section: Introductionsupporting

confidence: 91%

“…Neutrino production of heavy BSM particles that decay directly to taus or to other BSM particles that couple to taus have been introduced modify the standard model large elevation angle suppression [27,[31][32][33][34]. Several scenarios with decaying heavy dark matter have been proposed, including the one in which decaying dark matter is trapped in the Earth [35], and others in which the dark matter decays in the galactic halo that ultimately produce shower [36][37][38] or Askaryan events [39] in ANITA. Sterile neutrinos that interact to produce taus have been proposed to avoid the neutrino flux attenuation at large elevation angles [40,41].…”

Section: Introductionmentioning

confidence: 99%

“…In general, the ANITA events are in tension with other constraints, for example, as discussed in Ref. [38]. While there are scenarios that may be acceptable, e.g., boosted dark matter decays into lighter dark matter which decays into hadrons for specific model parameters [37], it is a challenge to describe the ANITA unusual events including the emergence angles and not over predict IceCube and Auger event rates.…”

Section: Introductionmentioning

confidence: 99%

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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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Gravitational vector Dark Matter

Groß

Karamitsos

Landini

et al. 2021

J. High Energ. Phys.

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A new dark sector consisting of a pure non-abelian gauge theory has no renormalizable interaction with SM particles, and can thereby realise gravitational Dark Matter (DM). Gauge interactions confine at a scale ΛDM giving bound states with typical lifetimes $$ \tau \sim {M}_{\mathrm{P}1}^4/{\Lambda}_{\mathrm{DM}}^5 $$ τ ∼ M P 1 4 / Λ DM 5 that can be DM candidates if ΛDM is below 100 TeV. Furthermore, accidental symmetries of group-theoretical nature produce special gravitationally stable bound states. In the presence of generic Planck-suppressed operators such states become long-lived: SU(N) gauge theories contain bound states with $$ \tau \sim {M}_{\mathrm{P}1}^8/{\Lambda}_{\mathrm{DM}}^9 $$ τ ∼ M P 1 8 / Λ DM 9 ; even longer lifetimes τ = (MPl/ΛDM)2N−4/ΛDM arise from SO(N) theories with N ≥ 8, and possibly from F4 or E8. We compute their relic abundance generated by gravitational freeze-in and by inflationary fluctuations, finding that they can be viable DM candidates for ΛDM ≳ 1010 GeV.

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Can the ANITA anomalous events be due to new physics?

Cited by 30 publications

References 41 publications

A global view of the off-shell Higgs portal

A global view of the off-shell Higgs portal

Anomalous ANITA air shower events and tau decays

Gravitational vector Dark Matter

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