Strong CMB Constraint On P-Wave Annihilating Dark Matter
- Creators
- An, Haipeng
- Wise, Mark B.
- Zhang, Yue
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.
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.Attached Files
Published - 1-s2.0-S0370269317306317-main.pdf
Submitted - 1606.02305v1.pdf
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Additional details
- Eprint ID
- 67952
- Resolver ID
- CaltechAUTHORS:20160615-155545845
- DE-SC0011632
- Department of Energy (DOE)
- DE-SC0010255
- Department of Energy (DOE)
- 776
- Gordon and Betty Moore Foundation
- Walter Burke Institute for Theoretical Physics, Caltech
- SCOAP3
- Created
-
2016-06-15Created from EPrint's datestamp field
- Updated
-
2021-11-11Created from EPrint's last_modified field
- Caltech groups
- Walter Burke Institute for Theoretical Physics, Moore Center for Theoretical Cosmology and Physics
- Other Numbering System Name
- CALT-TH
- Other Numbering System Identifier
- 2016-014