skip to main content

DOE PAGESDOE PAGES

Title: Dark matter annihilation with s-channel internal Higgsstrahlung

We study the scenario of fermionic dark matter that annihilates to standard model fermions through an s-channel axial vector mediator. We point out that the well-known chirality suppression of the annihilation cross section can be alleviated by s-channel internal Higgsstrahlung. The shapes of the cosmic ray spectra are identical to that of t-channel internal Higgsstrahlung in the limit of a heavy mediating particle. Unlike the general case of t-channel bremsstrahlung, s-channel Higgsstrahlung can be the dominant annihilation process even for Dirac dark matter. Finally, since the s-channel mediator can be a standard model singlet, collider searches for the mediator are easily circumvented.
Authors:
 [1] ; ORCiD logo [1] ;  [1]
  1. Univ. of Hawaii, Honolulu, HI (United States). Dept. of Physics and Astronomy
Publication Date:
Grant/Contract Number:
SC0010504; PHY-1250573
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 759; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Univ. of Hawaii, Honolulu, HI (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
OSTI Identifier:
1254869
Alternate Identifier(s):
OSTI ID: 1360089

Kumar, Jason, Liao, Jiajun, and Marfatia, Danny. Dark matter annihilation with s-channel internal Higgsstrahlung. United States: N. p., Web. doi:10.1016/j.physletb.2016.05.085.
Kumar, Jason, Liao, Jiajun, & Marfatia, Danny. Dark matter annihilation with s-channel internal Higgsstrahlung. United States. doi:10.1016/j.physletb.2016.05.085.
Kumar, Jason, Liao, Jiajun, and Marfatia, Danny. 2016. "Dark matter annihilation with s-channel internal Higgsstrahlung". United States. doi:10.1016/j.physletb.2016.05.085.
@article{osti_1254869,
title = {Dark matter annihilation with s-channel internal Higgsstrahlung},
author = {Kumar, Jason and Liao, Jiajun and Marfatia, Danny},
abstractNote = {We study the scenario of fermionic dark matter that annihilates to standard model fermions through an s-channel axial vector mediator. We point out that the well-known chirality suppression of the annihilation cross section can be alleviated by s-channel internal Higgsstrahlung. The shapes of the cosmic ray spectra are identical to that of t-channel internal Higgsstrahlung in the limit of a heavy mediating particle. Unlike the general case of t-channel bremsstrahlung, s-channel Higgsstrahlung can be the dominant annihilation process even for Dirac dark matter. Finally, since the s-channel mediator can be a standard model singlet, collider searches for the mediator are easily circumvented.},
doi = {10.1016/j.physletb.2016.05.085},
journal = {Physics Letters. Section B},
number = ,
volume = 759,
place = {United States},
year = {2016},
month = {5}
}