WIMP dark matter in the parity solution to the strong CP problem

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dc.contributor.authorKawamura, Junichiro
dc.contributor.authorOkawa, Shohei
dc.contributor.authorOmura, Yuji
dc.contributor.authorTang, Yong
dc.date.accessioned2020-11-02T20:47:52Z
dc.date.available2020-11-02T20:47:52Z
dc.date.copyright2019en_US
dc.date.issued2019
dc.description.abstractWe extend the Standard Model (SM) with parity symmetry, motivated by the strong CP problem and dark matter. In our model, parity symmetry is conserved at high energy by introducing a mirror sector with the extra gauge symmetry, SU(2)R × U(1)R. The charges of SU(2)R × U(1)R are assigned to the mirror fields in the same way as in the SM, but the chiralities of the mirror fermions are opposite to respect the parity symmetry. The strong CP problem is resolved, since the mirror quarks are also charged under the SU(3)c in the SM. In the minimal setup, the mirror gauge symmetry leads to stable colored particles which would be inconsistent with the observed data, so that we introduce two scalars in order to deplete the stable colored particles. Interestingly, one of the scalars becomes stable because of the gauge symmetry and therefore can be a good dark matter candidate. We especially study the phenomenology relevant to the dark matter, i.e. thermal relic density, direct and indirect searches for the dark matter. The bounds from the LHC experiment and the Landau pole are also taken into account. As a result, we find that a limited region is viable: the mirror up quark mass is around [600 GeV, 3 TeV] and the relative mass difference between the dark matter and the mirror up quark or electron is about O(1–10%). We also discuss the neutrino sector and show that the right-handed neutrinos in the mirror sector can increase the effective number of neutrinos or dark radiation by 0.14.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipThis work is supported in part by the Grant-in-Aid for Scienti c Research from the Ministry of Education, Science, Sports, and Culture (MEXT), Japan (No.18K13534 [JK] and No.17H05404 [YO]), the Department of Energy under Award No. DE-SC0011276 [JK] of the U.S., JSPS Overseas Challenge Program for Young Researchers and NSERC of Canada [SO], and the Grant-in-Aid for Innovative Areas, Japan (No.16H06490 [YT]).en_US
dc.identifier.citationKawamura, J., Okawa, S., Omura, Y., & Tang, Y. (2019) WIMP dark matter in the parity solution to the strong CP problem. Journal of High Energy Physics, 2019. https://doi.org/10.1007/JHEP04(2019)162en_US
dc.identifier.urihttps://doi.org/10.1007/JHEP04(2019)162
dc.identifier.urihttp://hdl.handle.net/1828/12287
dc.language.isoenen_US
dc.publisherJournal of High Energy Physicsen_US
dc.subjectBeyond Standard Modelen_US
dc.subjectCosmology of Theories beyond the SMen_US
dc.subjectCP violationen_US
dc.titleWIMP dark matter in the parity solution to the strong CP problemen_US
dc.typeArticleen_US

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