Light $$$$Z^\prime $$$$ and Dirac fermion dark matter in the $$B-L$$ model
Abstract
We consider a U(1)B–L model with a Z' portal Dirac fermion dark matter (DM) χ of low mass which couples very weakly to the B–L gauge boson Z'. Here, an arbitrary B–L charge Q≠±1,±3 of the DM χ ensures its stability. Motivated by the sensitivity reach of forthcoming “Lifetime Frontier” experiments, we focus on the Z' mass, mZ', in the sub-GeV to few GeV range. To evaluate the DM relic abundance, we examine both the freeze-out and freeze-in DM scenarios. For the freeze-out scenario, we show that the observed DM abundance is reproduced near the Z' resonance, mχ≃mZ'/2 , where mχ is the DM mass. For the freeze-in scenario, we focus on mχ << mZ'. We show that for a fixed value of mZ', gBL values roughly scale as 1/Q to reproduce the observed DM abundance. For various Q values in the range between 10–6 and 102, we show that the gauge coupling values gBL needed to reproduce the observed DM abundance lie in the search reach of future planned and/or proposed experiments such as FASER, Belle-II, LDMX, and SHiP. In the freeze-in case, the Q values to realize observable gBL values are found to be much smaller than thatmore »
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Delaware, Newark, DE (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1890554
- Alternate Identifier(s):
- OSTI ID: 1997452; OSTI ID: 1998145
- Grant/Contract Number:
- SC0012447; SC0013880
- Resource Type:
- Published Article
- Journal Name:
- European Physical Journal. C, Particles and Fields (Online)
- Additional Journal Information:
- Journal Name: European Physical Journal. C, Particles and Fields (Online) Journal Volume: 82 Journal Issue: 10; Journal ID: ISSN 1434-6052
- Publisher:
- Springer Science + Business Media
- Country of Publication:
- Germany
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Nath, Newton, Okada, Nobuchika, Okada, Satomi, Raut, Digesh, and Shafi, Qaisar. Light $$Z^\prime $$ and Dirac fermion dark matter in the $$B-L$$ model. Germany: N. p., 2022.
Web. doi:10.1140/epjc/s10052-022-10801-3.
Nath, Newton, Okada, Nobuchika, Okada, Satomi, Raut, Digesh, & Shafi, Qaisar. Light $$Z^\prime $$ and Dirac fermion dark matter in the $$B-L$$ model. Germany. https://doi.org/10.1140/epjc/s10052-022-10801-3
Nath, Newton, Okada, Nobuchika, Okada, Satomi, Raut, Digesh, and Shafi, Qaisar. Mon .
"Light $$Z^\prime $$ and Dirac fermion dark matter in the $$B-L$$ model". Germany. https://doi.org/10.1140/epjc/s10052-022-10801-3.
@article{osti_1890554,
title = {Light $$Z^\prime $$ and Dirac fermion dark matter in the $$B-L$$ model},
author = {Nath, Newton and Okada, Nobuchika and Okada, Satomi and Raut, Digesh and Shafi, Qaisar},
abstractNote = {We consider a U(1)B–L model with a Z' portal Dirac fermion dark matter (DM) χ of low mass which couples very weakly to the B–L gauge boson Z'. Here, an arbitrary B–L charge Q≠±1,±3 of the DM χ ensures its stability. Motivated by the sensitivity reach of forthcoming “Lifetime Frontier” experiments, we focus on the Z' mass, mZ', in the sub-GeV to few GeV range. To evaluate the DM relic abundance, we examine both the freeze-out and freeze-in DM scenarios. For the freeze-out scenario, we show that the observed DM abundance is reproduced near the Z' resonance, mχ≃mZ'/2 , where mχ is the DM mass. For the freeze-in scenario, we focus on mχ << mZ'. We show that for a fixed value of mZ', gBL values roughly scale as 1/Q to reproduce the observed DM abundance. For various Q values in the range between 10–6 and 102, we show that the gauge coupling values gBL needed to reproduce the observed DM abundance lie in the search reach of future planned and/or proposed experiments such as FASER, Belle-II, LDMX, and SHiP. In the freeze-in case, the Q values to realize observable gBL values are found to be much smaller than that in the freeze-out case.},
doi = {10.1140/epjc/s10052-022-10801-3},
journal = {European Physical Journal. C, Particles and Fields (Online)},
number = 10,
volume = 82,
place = {Germany},
year = {Mon Oct 03 00:00:00 EDT 2022},
month = {Mon Oct 03 00:00:00 EDT 2022}
}
https://doi.org/10.1140/epjc/s10052-022-10801-3
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