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Title: Strong CMB constraint on P -wave annihilating dark matter

Abstract

We consider a dark sector consisting of dark matter that is a Dirac fermion and a scalar mediator. This model has been extensively studied in the past. If the scalar couples to the dark matter in a parity conserving manner then dark matter annihilation to two mediators is dominated by the P-wave channel and hence is suppressed at very low momentum. The indirect detection constraint from the anisotropy of the Cosmic Microwave Background is usually thought to be absent in the model because of this suppression. In this letter we show that dark matter annihilation via bound state formation occurs through the S-wave and hence there is a constraint on the parameter space of the model from the Cosmic Microwave Background.

Authors:
; ;
Publication Date:
Research Org.:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1375276
Alternate Identifier(s):
OSTI ID: 1545721
Grant/Contract Number:  
SC0010255; SC0011632
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Name: Physics Letters B Journal Volume: 773 Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

An, Haipeng, Wise, Mark B., and Zhang, Yue. Strong CMB constraint on P -wave annihilating dark matter. Netherlands: N. p., 2017. Web. doi:10.1016/j.physletb.2017.08.010.
An, Haipeng, Wise, Mark B., & Zhang, Yue. Strong CMB constraint on P -wave annihilating dark matter. Netherlands. doi:10.1016/j.physletb.2017.08.010.
An, Haipeng, Wise, Mark B., and Zhang, Yue. Sun . "Strong CMB constraint on P -wave annihilating dark matter". Netherlands. doi:10.1016/j.physletb.2017.08.010.
@article{osti_1375276,
title = {Strong CMB constraint on P -wave annihilating dark matter},
author = {An, Haipeng and Wise, Mark B. and Zhang, Yue},
abstractNote = {We consider a dark sector consisting of dark matter that is a Dirac fermion and a scalar mediator. This model has been extensively studied in the past. If the scalar couples to the dark matter in a parity conserving manner then dark matter annihilation to two mediators is dominated by the P-wave channel and hence is suppressed at very low momentum. The indirect detection constraint from the anisotropy of the Cosmic Microwave Background is usually thought to be absent in the model because of this suppression. In this letter we show that dark matter annihilation via bound state formation occurs through the S-wave and hence there is a constraint on the parameter space of the model from the Cosmic Microwave Background.},
doi = {10.1016/j.physletb.2017.08.010},
journal = {Physics Letters B},
number = C,
volume = 773,
place = {Netherlands},
year = {2017},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2017.08.010

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Cited by: 6 works
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Works referencing / citing this record:

Rapid Bound State Formation of Dark Matter in the Early Universe
journal, April 2020