Gamma-rays from dark showers with twin Higgs models
Abstract
We consider a twin WIMP scenario whose twin sector contains a full dark copy of the SM hadrons, where the lightest twin particles are twin pions. By analogy to the standard WIMP paradigm, the dark matter (DM) freezes out through twin electroweak interactions, and annihilates into a dark shower of light twin hadrons. These are either stable or decay predominantly to standard model (SM) photons. We show that this ‘hadrosymmetric’ scenario can be consistent with all applicable astrophysical, cosmological and collider constraints. In order to decay the twin hadrons before the big-bang nucleosynthesis epoch, an additional portal between the SM and twin sector is required. In most cases we find this additional mediator is within reach of either the LHC or future intensity frontier experiments. Furthermore, we conduct simulations of the dark shower and consequent photon spectra. We find that fits of these spectra to the claimed galactic center gamma-ray excess seen by Fermi -LAT non-trivially coincide with regions of parameter space that both successfully generate the observed DM abundance and exhibit minimal fine-tuning.
- Authors:
-
- Univ. of Oregon, Eugene, OR (United States). Inst. of Theoretical Science
- Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of Maryland, College Park, MD (United States). Maryland Center for Fundamental Physics
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1379325
- Grant/Contract Number:
- AC02-05CH11231; SC0011640; PHY-1066293; PHY-1002399; PHY-1315155
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 5; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; Cosmology of Theories beyond the SM; Global Symmetries
Citation Formats
Freytsis, Marat, Knapen, Simon, Robinson, Dean J., and Tsai, Yuhsin. Gamma-rays from dark showers with twin Higgs models. United States: N. p., 2016.
Web. doi:10.1007/JHEP05(2016)018.
Freytsis, Marat, Knapen, Simon, Robinson, Dean J., & Tsai, Yuhsin. Gamma-rays from dark showers with twin Higgs models. United States. https://doi.org/10.1007/JHEP05(2016)018
Freytsis, Marat, Knapen, Simon, Robinson, Dean J., and Tsai, Yuhsin. Tue .
"Gamma-rays from dark showers with twin Higgs models". United States. https://doi.org/10.1007/JHEP05(2016)018. https://www.osti.gov/servlets/purl/1379325.
@article{osti_1379325,
title = {Gamma-rays from dark showers with twin Higgs models},
author = {Freytsis, Marat and Knapen, Simon and Robinson, Dean J. and Tsai, Yuhsin},
abstractNote = {We consider a twin WIMP scenario whose twin sector contains a full dark copy of the SM hadrons, where the lightest twin particles are twin pions. By analogy to the standard WIMP paradigm, the dark matter (DM) freezes out through twin electroweak interactions, and annihilates into a dark shower of light twin hadrons. These are either stable or decay predominantly to standard model (SM) photons. We show that this ‘hadrosymmetric’ scenario can be consistent with all applicable astrophysical, cosmological and collider constraints. In order to decay the twin hadrons before the big-bang nucleosynthesis epoch, an additional portal between the SM and twin sector is required. In most cases we find this additional mediator is within reach of either the LHC or future intensity frontier experiments. Furthermore, we conduct simulations of the dark shower and consequent photon spectra. We find that fits of these spectra to the claimed galactic center gamma-ray excess seen by Fermi -LAT non-trivially coincide with regions of parameter space that both successfully generate the observed DM abundance and exhibit minimal fine-tuning.},
doi = {10.1007/JHEP05(2016)018},
journal = {Journal of High Energy Physics (Online)},
number = 5,
volume = 2016,
place = {United States},
year = {Tue May 03 00:00:00 EDT 2016},
month = {Tue May 03 00:00:00 EDT 2016}
}
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