Supersymmetric sphaleron configurations as the origin of the perplexing ANITA events

Anchordoqui, Luis A.; Antoniadis, Ignatios

doi:10.1016/j.physletb.2019.02.003

Cited by 36 publications

(30 citation statements)

References 91 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several models beyond the Standard Model (SM) have been suggested as possible explanations. These fall into three broad categories: (1) SM neutrinos of astrophysical origin could convert to beyond-the-standard-model (BSM) particles through interactions in the Earth, followed by propagation of the BSM particle until it reconverts to SM particles that initiate the observed hadronic air shower [6][7][8][9]; (2) dark matter (DM) that has accumulated within the Earth and decays to BSM particles that reconvert to SM particles shortly below the Antarctic surface could induce the air showers; or (3) an exotic flux of BSM particles, such as sterile neutrinos [10,11] incident upon the Earth interact to produce the observed particles near the Earth's surface. A possible source of such flux is the decay of long-lived DM particles [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Can the ANITA anomalous events be due to new physics?

2019

View full text Add to dashboard Cite

The ANITA collaboration has observed two ultra-high-energy upgoing air shower events that cannot originate from Standard Model neutrinos that have traversed the Earth. Several beyondthe-standard-model physics scenarios have been proposed as explanations for these events. In this paper we present some general arguments making it challenging for new physics to explain the events. One exceptional class of models that could work is pointed out, in which metastable dark matter decays to a highly boosted lighter dark matter particle, that can interact in the Earth to produce the observed events.

show abstract

Section: Introductionmentioning

confidence: 99%

Can the ANITA anomalous events be due to new physics?

2019

View full text Add to dashboard Cite

show abstract

“…Beyond the Standard Model (BSM) explanations have also been proposed. This includes axion-photon conversion [88], sterile neutrinos [47,[89][90][91], and heavy SUSY partners or Dark Matter particle decays [92][93][94][95][96][97][98][99]. Here, we examine the discrete-source emission hypothesis and show that any detection of EeV neutrinos from steep incident angles at ANITA can be ruled out by the non-observation of TeV -PeV neutrinos with other neutrino telescopes, such as IceCube.…”

Section: Anita and Its Anomalous Eventsmentioning

confidence: 99%

Observing EeV neutrinos through Earth: GZK and the anomalous ANITA events

Safa

Pizzuto

Argüelles

et al. 2020

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

Tau neutrinos are unique cosmic messengers, especially at extreme energies. When they undergo a charged-current interaction, the short lifetime of the produced tau gives rise to secondary tau neutrinos that carry a significant fraction of the primary neutrino energy. This effect, known as tau neutrino regeneration, has not been applied to its full potential in current generation neutrino experiments. In this work, we present an updated calculation of tau neutrino regeneration, and explore its implications for two scenarios: the recent anomalous ANITA events and the cosmogenic neutrino flux. For the former, we investigate the idea of localized emission and find that the maximum secondary neutrino flux allowed by IceCube measurements implies a primary flux that is incompatible with the ANITA observation, regardless of the assumed source energy spectrum. For the latter, we study the prospect of detecting the cosmogenic neutrino flux of regenerated PeV neutrinos with current and next generation neutrino detectors.

show abstract

“…Therefore, several beyond standard model (BSM) proposals have been put forward to explain the observed events. They include sterile neutrino mixing [3,4], heavy dark matter (DM) [5][6][7][8][9][10], inelastic boosted DM [11], long lived charged particles like stau [12,13], R-parity violating supersymmetry (SUSY) [14], SUSY sphalerons configurations [15], leptoquarks [16], and radio pulses from axion-photon conversion [17]. Additionally, in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…where Γ E " ΓpE Ñ τ´Φ2 q is the rest frame decay width of E obtained from equation (15). As before, here we used the approximation E τ " E ν {4 to get the observed shower energy " 0.5 EeV by taking the incident neutrino energy E ν " 2 EeV.…”

mentioning

confidence: 99%

Connecting ANITA anomalous events to a nonthermal dark matter scenario

et al. 2020

View full text Add to dashboard Cite

The ANtarctic Impulsive Transient Antenna (ANITA) collaboration has observed two EeVenergy, upward going events originating from below the horizon. As no standard model (SM) particles, propagating through the earth at such energy and exit angles, can give rise to the required survival probability for the observed events, several beyond standard model (BSM) proposals have come up. We propose a scenario where a Z 2 odd sector is responsible for such anomalous events. The next to lightest Z 2 odd particle or the next to lightest stable particle (NLSP), created from ultra high energy neutrino interactions with nucleons, can pass through the earth and then decay into the lightest Z 2 odd particle or the lightest stable particle (LSP) and a tau lepton. The long lived nature of the NLSP requires its coupling with the LSP to be very small, keeping the LSP out of thermal equilibrium in the early universe. The LSP can then be a non-thermal dark matter while the tau leptons produced from NLSP decay after passing through earth can explain the ANITA events. We first show that a purely non-thermal dark matter scenario can not give rise to the required event rates while a hybrid scenario where dark matter can have both thermal as well non-thermal contribution to its relic abundance, serves the purpose. * dborah@iitg.ac.in

show abstract

Supersymmetric sphaleron configurations as the origin of the perplexing ANITA events

Cited by 36 publications

References 91 publications

Can the ANITA anomalous events be due to new physics?

Can the ANITA anomalous events be due to new physics?

Observing EeV neutrinos through Earth: GZK and the anomalous ANITA events

Connecting ANITA anomalous events to a nonthermal dark matter scenario

Contact Info

Product

Resources

About