Strong CMB Constraint On P-Wave Annihilating Dark Matter

An, Haipeng and Wise, Mark B. and Zhang, Yue (2017) Strong CMB Constraint On P-Wave Annihilating Dark Matter. Physics Letters B, 773 . pp. 121-124. ISSN 0370-2693. doi:10.1016/j.physletb.2017.08.010. https://resolver.caltech.edu/CaltechAUTHORS:20160615-155545845

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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.

Item Type:

Article

Related URLs:

URL	URL Type	Description
http://dx.doi.org/10.1016/j.physletb.2017.08.010	DOI	Article
http://www.sciencedirect.com/science/article/pii/S0370269317306317	Publisher	Article
http://arxiv.org/abs/1606.02305	arXiv	Discussion Paper

Additional Information:

© 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. Received 26 September 2016, Revised 7 August 2017, Accepted 10 August 2017, Available online 16 August 2017. We acknowledge an illuminating conversation with Haibo Yu. This work is supported by the DOE Grant DE-SC0011632, DE-SC0010255, and by the Gordon and Betty Moore Foundation through Grant No. 776 to the Caltech Moore Center for Theoretical Cosmology and Physics. We are also grateful for the support provided by the Walter Burke Institute for Theoretical Physics.

Group:

Walter Burke Institute for Theoretical Physics, Moore Center for Theoretical Cosmology and Physics

Funders:

Funding Agency	Grant Number
Department of Energy (DOE)	DE-SC0011632
Department of Energy (DOE)	DE-SC0010255
Gordon and Betty Moore Foundation	776
Walter Burke Institute for Theoretical Physics, Caltech	UNSPECIFIED
SCOAP3	UNSPECIFIED

Other Numbering System:

Other Numbering System Name	Other Numbering System ID
CALT-TH	2016-014

DOI:

10.1016/j.physletb.2017.08.010

Record Number:

CaltechAUTHORS:20160615-155545845

Persistent URL:

https://resolver.caltech.edu/CaltechAUTHORS:20160615-155545845

Official Citation:

Haipeng An, Mark B. Wise, Yue Zhang, Strong CMB constraint on P-wave annihilating dark matter, Physics Letters B, Volume 773, 10 October 2017, Pages 121-124, ISSN 0370-2693, https://doi.org/10.1016/j.physletb.2017.08.010. (http://www.sciencedirect.com/science/article/pii/S0370269317306317)

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No commercial reproduction, distribution, display or performance rights in this work are provided.

ID Code:

67952

Collection:

CaltechAUTHORS

Deposited By:

Joy Painter

Deposited On:

15 Jun 2016 23:05

Last Modified:

11 Nov 2021 03:57

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