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Right-handed neutrino dark matter in the classically conformal U(1)′ extended standard model
https://oist.repo.nii.ac.jp/records/327
https://oist.repo.nii.ac.jp/records/327cce8bdd1-de87-4d11-9c43-b606fc90f88d
名前 / ファイル | ライセンス | アクション |
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PhysRevD.96.095032 (814.6 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-03-13 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Right-handed neutrino dark matter in the classically conformal U(1)′ extended standard model | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者(英) |
Oda, Satsuki
× Oda, Satsuki× Okada, Nobuchika× Takahashi, Dai-suke |
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書誌情報 |
en : Physical Review D 巻 96, 号 9, p. 095032, 発行日 2017-11-29 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | We consider the dark matter (DM) scenario in the context of the classically conformal U(1)′ extended standard model (SM), with three right-handed neutrinos (RHNs) and the U(1)′ Higgs field. The model is free from all of the U(1)′ gauge and gravitational anomalies in the presence of the three RHNs. We introduce a Z2 parity in the model, under which an odd parity is assigned to one RHN, while all of the other particles are assigned to be Z2 even, and hence the Z2-odd RHN serves as a DM candidate. In this model, the U(1)′ gauge symmetry is radiatively broken through the Coleman-Weinberg mechanism, by which the electroweak symmetry breaking is triggered. There are three free parameters in our model—the U(1)′ charge of the SM Higgs doublet (xH), the new U(1)′ gauge coupling (gX), and the U(1)′ gauge boson (Z′) mass (mZ′)—which are severely constrained in order to solve the electroweak vacuum instability problem, and satisfy the LHC Run-2 bounds from the search for the Z′ boson resonance. In addition to these constraints, we investigate the RHN DM physics. Because of the nature of classical conformality, we find that a RHN DM pair mainly annihilates into the SM particles through Z′ boson exchange. This is the so-called Z′-portal DM scenario. Combining the electroweak vacuum stability condition, the LHC Run-2 bounds, and the cosmological constraint from the observed DM relic density, we find that all constraints work together to narrow the allowed parameter regions and, in particular, exclude mZ′≲3.5 TeV. For the obtained allowed regions, we calculate the spin-independent cross section of the RHN DM with nucleons. We find that the resultant cross section is well below the current experimental upper bounds. | |||||
出版者 | ||||||
出版者 | American Physical Society | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2470-0010 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1103/PhysRevD.96.095032 | |||||
権利 | ||||||
権利情報 | © 2017 American Physical Society | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://journals.aps.org/prd/abstract/10.1103/PhysRevD.96.095032 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |