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Title: Indirect detection of neutrino portal dark matter

Abstract

We investigate the feasibility of the indirect detection of dark matter in a simple model using the neutrino portal. The model is very economical, with right-handed neutrinos generating neutrino masses through the type-I seesaw mechanism and simultaneously mediating interactions with dark matter. Given the small neutrino Yukawa couplings expected in a type-I seesaw, direct detection and accelerator probes of dark matter in this scenario are challenging. However, dark matter can efficiently annihilate to right-handed neutrinos, which then decay via active-sterile mixing through the weak interactions, leading to a variety of indirect astronomical signatures. We derive the existing constraints on this scenario from Planck cosmic microwave background measurements, Fermi dwarf spheroidal galaxy and Galactic center gamma-ray observations, and AMS-02 antiproton observations, and we also discuss the future prospects of Fermi and the Cherenkov Telescope Array. Thermal annihilation rates are already being probed for dark matter lighter than about 50 GeV, and this can be extended to dark matter masses of 100 GeV and beyond in the future. This scenario can also provide a dark matter interpretation of the Fermi Galactic center gamma-ray excess, and we confront this interpretation with other indirect constraints. Finally we discuss some of the exciting implications ofmore » extensions of the minimal model with large neutrino Yukawa couplings and Higgs portal couplings.« less

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States); Univ. of Pittsburgh, PA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1437507
Alternate Identifier(s):
OSTI ID: 1498912
Grant/Contract Number:  
SC0015634; FG02-95ER40896
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 97 Journal Issue: 9; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Batell, Brian, Han, Tao, and Shams Es Haghi, Barmak. Indirect detection of neutrino portal dark matter. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.97.095020.
Batell, Brian, Han, Tao, & Shams Es Haghi, Barmak. Indirect detection of neutrino portal dark matter. United States. doi:10.1103/PhysRevD.97.095020.
Batell, Brian, Han, Tao, and Shams Es Haghi, Barmak. Thu . "Indirect detection of neutrino portal dark matter". United States. doi:10.1103/PhysRevD.97.095020.
@article{osti_1437507,
title = {Indirect detection of neutrino portal dark matter},
author = {Batell, Brian and Han, Tao and Shams Es Haghi, Barmak},
abstractNote = {We investigate the feasibility of the indirect detection of dark matter in a simple model using the neutrino portal. The model is very economical, with right-handed neutrinos generating neutrino masses through the type-I seesaw mechanism and simultaneously mediating interactions with dark matter. Given the small neutrino Yukawa couplings expected in a type-I seesaw, direct detection and accelerator probes of dark matter in this scenario are challenging. However, dark matter can efficiently annihilate to right-handed neutrinos, which then decay via active-sterile mixing through the weak interactions, leading to a variety of indirect astronomical signatures. We derive the existing constraints on this scenario from Planck cosmic microwave background measurements, Fermi dwarf spheroidal galaxy and Galactic center gamma-ray observations, and AMS-02 antiproton observations, and we also discuss the future prospects of Fermi and the Cherenkov Telescope Array. Thermal annihilation rates are already being probed for dark matter lighter than about 50 GeV, and this can be extended to dark matter masses of 100 GeV and beyond in the future. This scenario can also provide a dark matter interpretation of the Fermi Galactic center gamma-ray excess, and we confront this interpretation with other indirect constraints. Finally we discuss some of the exciting implications of extensions of the minimal model with large neutrino Yukawa couplings and Higgs portal couplings.},
doi = {10.1103/PhysRevD.97.095020},
journal = {Physical Review D},
number = 9,
volume = 97,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.97.095020

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Cited by: 7 works
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    Works referencing / citing this record:

    Dark matter from freeze-in via the neutrino portal
    journal, July 2019


    Dark matter from freeze-in via the neutrino portal
    journal, July 2019