Dark matter annihilation with s-channel internal Higgsstrahlung

Kumar, Jason; Liao, Jiajun; Marfatia, Danny

doi:10.1016/j.physletb.2016.05.085

Title: Dark matter annihilation with s-channel internal Higgsstrahlung

Abstract

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:

Kumar, Jason;

; Marfatia, Danny

Publication Date:: Mon Aug 01 00:00:00 EDT 2016

Research Org.:: Univ. of Hawaii, Honolulu, HI (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)

OSTI Identifier:: 1254869

Alternate Identifier(s):: OSTI ID: 1360089

Grant/Contract Number:: SC0010504; PHY-1250573

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 759 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats


                    Kumar, Jason, Liao, Jiajun, and Marfatia, Danny. Dark matter annihilation with s-channel internal Higgsstrahlung.  Netherlands: N. p., 2016. 
Web.  doi:10.1016/j.physletb.2016.05.085.

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                    Kumar, Jason, Liao, Jiajun, & Marfatia, Danny. Dark matter annihilation with s-channel internal Higgsstrahlung.  Netherlands.  https://doi.org/10.1016/j.physletb.2016.05.085

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                    Kumar, Jason, Liao, Jiajun, and Marfatia, Danny. Mon .  
"Dark matter annihilation with s-channel internal Higgsstrahlung".  Netherlands.  https://doi.org/10.1016/j.physletb.2016.05.085.

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@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 B},

  number       = C,

  volume       = 759,

  place        = {Netherlands},

  year         = {Mon Aug 01 00:00:00 EDT 2016},

  month        = {Mon Aug 01 00:00:00 EDT 2016}

}

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Collider and dark matter searches in the inert doublet model from Peccei-Quinn symmetry
journal, October 2016

Alves, Alexandre; Camargo, Daniel A.; Dias, Alex G.
Journal of High Energy Physics, Vol. 2016, Issue 10
DOI: 10.1007/jhep10(2016)015

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Title: Dark matter annihilation with s-channel internal Higgsstrahlung

Abstract

Citation Formats

Collider and dark matter searches in the inert doublet model from Peccei-Quinn symmetry journal, October 2016

Collider and dark matter searches in the inert doublet model from Peccei-Quinn symmetry
journal, October 2016