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Title: Asymmetric dark matter in extended exo-Higgs scenarios

Abstract

Here, the exo-Higgs model can accommodate a successful baryogenesis mechanism that closely mirrors electroweak baryogenesis in the Standard Model, but avoids its shortcomings. We extend the exo- Higgs model by the addition of a singlet complex scalar. In our model, Χ can be a viable asymmetric dark matter (ADM) candidate. We predict the mass of the ADM particle to be m x ≈ 1.3 GeV. The leptophilic couplings of can provide for efficient annihilation of the ADM pairs. We also discuss the LHC signals of our scenario, and in particular the production and decays of exo-leptons which would lead to "lepton pair plus missing energy" final states. Our model typically predicts potentially detectable gravitational waves originating from the assumed strong first order phase transition at a temperature of ~TeV. If the model is further extended to include new heavy vector-like fermions, e.g. from an ultraviolet extension, Χ couplings could explain the ~3.5 muon g – 2 anomaly.

Authors:
; ORCiD logo;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1371597
Alternate Identifier(s):
OSTI ID: 1371535
Report Number(s):
[BNL-114049-2017-JA]
[Journal ID: ISSN 0370-2693; S0370269317305567; PII: S0370269317305567]
Grant/Contract Number:  
[SC0012704; SC00112704]
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
[Journal Name: Physics Letters B Journal Volume: 772 Journal Issue: C]; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; muon; TeV; fermions; leptons; exoleptons; ADM; baryogenesis; SM

Citation Formats

Davoudiasl, Hooman, Giardino, Pier Paolo, and Zhang, Cen. Asymmetric dark matter in extended exo-Higgs scenarios. Netherlands: N. p., 2017. Web. doi:10.1016/j.physletb.2017.07.009.
Davoudiasl, Hooman, Giardino, Pier Paolo, & Zhang, Cen. Asymmetric dark matter in extended exo-Higgs scenarios. Netherlands. doi:10.1016/j.physletb.2017.07.009.
Davoudiasl, Hooman, Giardino, Pier Paolo, and Zhang, Cen. Fri . "Asymmetric dark matter in extended exo-Higgs scenarios". Netherlands. doi:10.1016/j.physletb.2017.07.009.
@article{osti_1371597,
title = {Asymmetric dark matter in extended exo-Higgs scenarios},
author = {Davoudiasl, Hooman and Giardino, Pier Paolo and Zhang, Cen},
abstractNote = {Here, the exo-Higgs model can accommodate a successful baryogenesis mechanism that closely mirrors electroweak baryogenesis in the Standard Model, but avoids its shortcomings. We extend the exo- Higgs model by the addition of a singlet complex scalar. In our model, Χ can be a viable asymmetric dark matter (ADM) candidate. We predict the mass of the ADM particle to be mx ≈ 1.3 GeV. The leptophilic couplings of can provide for efficient annihilation of the ADM pairs. We also discuss the LHC signals of our scenario, and in particular the production and decays of exo-leptons which would lead to "lepton pair plus missing energy" final states. Our model typically predicts potentially detectable gravitational waves originating from the assumed strong first order phase transition at a temperature of ~TeV. If the model is further extended to include new heavy vector-like fermions, e.g. from an ultraviolet extension, Χ couplings could explain the ~3.5 muon g – 2 anomaly.},
doi = {10.1016/j.physletb.2017.07.009},
journal = {Physics Letters B},
number = [C],
volume = [772],
place = {Netherlands},
year = {2017},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2017.07.009

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