Connecting dark matter annihilation to the vertex functions of Standard Model fermions
Abstract
We consider here scenarios in which dark matter is a Majorana fermion which couples to Standard Model fermions through the exchange of charged mediating particles. The matrix elements for various dark matter annihilation processes are then related to one-loop corrections to the fermion-photon vertex, where dark matter and the charged mediators run in the loop. In particular, in the limit where Standard Model fermion helicity mixing is suppressed, the cross section for dark matter annihilation to various final states is related to corrections to the Standard Model fermion charge form factor. These corrections can be extracted in a gauge-invariant manner from collider cross sections. While current measurements from colliders are not precise enough to provide useful constraints on dark matter annihilation, improved measurements at future experiments, such as the International Linear Collider, could improve these constraints by several orders of magnitude, allowing them to surpass the limits obtainable by direct observation
- Authors:
-
- Univ. of Hawaii, Honolulu, HI (United States)
- Publication Date:
- 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:
- 1598602
- Grant/Contract Number:
- SC0010504; PHY-1250573
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Cosmology and Astroparticle Physics
- Additional Journal Information:
- Journal Volume: 2017; Journal Issue: 07; Journal ID: ISSN 1475-7516
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; dark matter experiments; dark matter theory
Citation Formats
Kumar, Jason, and Light, Christopher. Connecting dark matter annihilation to the vertex functions of Standard Model fermions. United States: N. p., 2017.
Web. doi:10.1088/1475-7516/2017/07/030.
Kumar, Jason, & Light, Christopher. Connecting dark matter annihilation to the vertex functions of Standard Model fermions. United States. https://doi.org/10.1088/1475-7516/2017/07/030
Kumar, Jason, and Light, Christopher. Mon .
"Connecting dark matter annihilation to the vertex functions of Standard Model fermions". United States. https://doi.org/10.1088/1475-7516/2017/07/030. https://www.osti.gov/servlets/purl/1598602.
@article{osti_1598602,
title = {Connecting dark matter annihilation to the vertex functions of Standard Model fermions},
author = {Kumar, Jason and Light, Christopher},
abstractNote = {We consider here scenarios in which dark matter is a Majorana fermion which couples to Standard Model fermions through the exchange of charged mediating particles. The matrix elements for various dark matter annihilation processes are then related to one-loop corrections to the fermion-photon vertex, where dark matter and the charged mediators run in the loop. In particular, in the limit where Standard Model fermion helicity mixing is suppressed, the cross section for dark matter annihilation to various final states is related to corrections to the Standard Model fermion charge form factor. These corrections can be extracted in a gauge-invariant manner from collider cross sections. While current measurements from colliders are not precise enough to provide useful constraints on dark matter annihilation, improved measurements at future experiments, such as the International Linear Collider, could improve these constraints by several orders of magnitude, allowing them to surpass the limits obtainable by direct observation},
doi = {10.1088/1475-7516/2017/07/030},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 07,
volume = 2017,
place = {United States},
year = {Mon Jul 17 00:00:00 EDT 2017},
month = {Mon Jul 17 00:00:00 EDT 2017}
}
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