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Title: Indirect signals from solar dark matter annihilation to long-lived right-handed neutrinos

Abstract

In this paper, we study indirect detection signals from solar annihilation of dark matter (DM) particles into light right-handed (RH) neutrinos with a mass in a 1–5 GeV range. These RH neutrinos can have a sufficiently long lifetime to allow them to decay outside the Sun, and their delayed decays can result in a signal in gamma rays from the otherwise “dark” solar direction, and also a neutrino signal that is not suppressed by the interactions with solar medium. We find that the latest Fermi-LAT and IceCube results place limits on the gamma ray and neutrino signals, respectively. Combined photon and neutrino bounds can constrain the spin-independent DM-nucleon elastic scattering cross section better than direct detection experiments for DM masses from 200 GeV up to several TeV. Finally, the bounds on spin-dependent scattering are also much tighter than the strongest limits from direct detection experiments.

Authors:
 [1];  [2];  [1];  [3]
  1. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Physics and Astronomy
  2. Texas A & M Univ., College Station, TX (United States). Dept. of Physics and Astronomy. Mitchell Inst. for Fundamental Physics and Astronomy; Wayne State Univ., Detroit, MI (United States). Dept. of Physics and Astronomy
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)
Contributing Org.:
Texas A & M Univ., College Station, TX (United States); Wayne State Univ., Detroit, MI (United States)
OSTI Identifier:
1357126
Alternate Identifier(s):
OSTI ID: 1349772
Report Number(s):
LA-UR-16-29252
Journal ID: ISSN 2470-0010
Grant/Contract Number:
AC52-06NA25396; PHY-1417510
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 7; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Allahverdi, Rouzbeh, Gao, Yu, Knockel, Bradley, and Shalgar, Shashank. Indirect signals from solar dark matter annihilation to long-lived right-handed neutrinos. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.075001.
Allahverdi, Rouzbeh, Gao, Yu, Knockel, Bradley, & Shalgar, Shashank. Indirect signals from solar dark matter annihilation to long-lived right-handed neutrinos. United States. doi:10.1103/PhysRevD.95.075001.
Allahverdi, Rouzbeh, Gao, Yu, Knockel, Bradley, and Shalgar, Shashank. Tue . "Indirect signals from solar dark matter annihilation to long-lived right-handed neutrinos". United States. doi:10.1103/PhysRevD.95.075001. https://www.osti.gov/servlets/purl/1357126.
@article{osti_1357126,
title = {Indirect signals from solar dark matter annihilation to long-lived right-handed neutrinos},
author = {Allahverdi, Rouzbeh and Gao, Yu and Knockel, Bradley and Shalgar, Shashank},
abstractNote = {In this paper, we study indirect detection signals from solar annihilation of dark matter (DM) particles into light right-handed (RH) neutrinos with a mass in a 1–5 GeV range. These RH neutrinos can have a sufficiently long lifetime to allow them to decay outside the Sun, and their delayed decays can result in a signal in gamma rays from the otherwise “dark” solar direction, and also a neutrino signal that is not suppressed by the interactions with solar medium. We find that the latest Fermi-LAT and IceCube results place limits on the gamma ray and neutrino signals, respectively. Combined photon and neutrino bounds can constrain the spin-independent DM-nucleon elastic scattering cross section better than direct detection experiments for DM masses from 200 GeV up to several TeV. Finally, the bounds on spin-dependent scattering are also much tighter than the strongest limits from direct detection experiments.},
doi = {10.1103/PhysRevD.95.075001},
journal = {Physical Review D},
number = 7,
volume = 95,
place = {United States},
year = {Tue Apr 04 00:00:00 EDT 2017},
month = {Tue Apr 04 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
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Citation Metrics:
Cited by: 5works
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  • Cited by 5
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  • Relic abundance of dark matter is investigated in the framework of universal extra dimension models with right-handed neutrinos. These models are free from the serious Kaluza-Klein (KK) graviton problem that the original universal extra dimension model has. The first KK particle of the right-handed neutrino is a candidate for dark matter in this framework, and its relic abundance is determined by three processes, (1) the decay of the KK photon into the first KK right-handed neutrino in the late universe, (2) production of the first KK right-handed neutrino from the thermal bath in the early universe, and (3) the decaymore » of higher KK right-handed neutrinos into the first KK right-handed neutrino in the late universe. When ordinary neutrino masses are large enough such as the degenerate mass spectrum case, the last process contributes to the abundance significantly, even if the reheating temperature is low. The scale of the extra dimension consistent with cosmological observations can be 500 GeV in the minimal setup of universal extra dimension models with right-handed neutrinos.« less