Resumé
We study the loop-induced circularly polarized gamma rays from dark matter annihilation using the effective dark matter theory approach. Both neutral scalar and fermionic dark matter annihilating into monochromatic diphoton and Z-photon final states are considered. To generate the circular polarization asymmetry, P and CP symmetries must be violated in the couplings between dark matter and Standard Model fermions inside the loop with non-vanishing Cutkosky cut. The asymmetry can be sizable especially for Z-photon final state for which asymmetry of nearly 90% can be reached. We discuss the prospect for detecting the circular polarization asymmetry of the gamma-ray flux from dark matter annihilation in the Galactic Center in future gamma-ray polarimetry experiments.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 135104 |
| Tidsskrift | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Vol/bind | 800 |
| Antal sider | 10 |
| ISSN | 0370-2693 |
| DOI | |
| Status | Udgivet - 10. jan. 2020 |
Fingeraftryk
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Circularly polarized gamma rays in effective dark matter theory. / Huang, Wei Chih; Ng, Kin Wang; Yuan, Tzu Chiang.
I: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Bind 800, 135104, 10.01.2020.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review
TY - JOUR
T1 - Circularly polarized gamma rays in effective dark matter theory
AU - Huang, Wei Chih
AU - Ng, Kin Wang
AU - Yuan, Tzu Chiang
PY - 2020/1/10
Y1 - 2020/1/10
N2 - We study the loop-induced circularly polarized gamma rays from dark matter annihilation using the effective dark matter theory approach. Both neutral scalar and fermionic dark matter annihilating into monochromatic diphoton and Z-photon final states are considered. To generate the circular polarization asymmetry, P and CP symmetries must be violated in the couplings between dark matter and Standard Model fermions inside the loop with non-vanishing Cutkosky cut. The asymmetry can be sizable especially for Z-photon final state for which asymmetry of nearly 90% can be reached. We discuss the prospect for detecting the circular polarization asymmetry of the gamma-ray flux from dark matter annihilation in the Galactic Center in future gamma-ray polarimetry experiments.
AB - We study the loop-induced circularly polarized gamma rays from dark matter annihilation using the effective dark matter theory approach. Both neutral scalar and fermionic dark matter annihilating into monochromatic diphoton and Z-photon final states are considered. To generate the circular polarization asymmetry, P and CP symmetries must be violated in the couplings between dark matter and Standard Model fermions inside the loop with non-vanishing Cutkosky cut. The asymmetry can be sizable especially for Z-photon final state for which asymmetry of nearly 90% can be reached. We discuss the prospect for detecting the circular polarization asymmetry of the gamma-ray flux from dark matter annihilation in the Galactic Center in future gamma-ray polarimetry experiments.
U2 - 10.1016/j.physletb.2019.135104
DO - 10.1016/j.physletb.2019.135104
M3 - Journal article
AN - SCOPUS:85075548826
VL - 800
JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology
JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology
SN - 0370-2693
M1 - 135104
ER -