Testing complex singlet scalar cosmology at the Large Hadron Collider
Abstract The Standard Model extended with a complex singlet scalar (cxSM) can admit a strong first order electroweak phase transition (SFOEWPT) as needed for electroweak baryogenesis and provide a dark matter (DM) candidate. The presence of both a DM candidate and a singlet-like scalar that mixes wi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-01-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP01(2024)051 |
| _version_ | 1797356022690480128 |
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| author | Wenxing Zhang Yizhou Cai Michael J. Ramsey-Musolf Lei Zhang |
| author_facet | Wenxing Zhang Yizhou Cai Michael J. Ramsey-Musolf Lei Zhang |
| author_sort | Wenxing Zhang |
| collection | DOAJ |
| description | Abstract The Standard Model extended with a complex singlet scalar (cxSM) can admit a strong first order electroweak phase transition (SFOEWPT) as needed for electroweak baryogenesis and provide a dark matter (DM) candidate. The presence of both a DM candidate and a singlet-like scalar that mixes with the Standard Model Higgs boson leads to the possibility of a b b ¯ $$ b\overline{b} $$ + MET final state in pp collisions. Focusing on this channel, we analyze the prospective reach at the Large Hadron Collider (LHC) for a heavy singlet-like scalar in regions of cxSM parameter space compatible with a SFOEWPT and DM phenomenology. We identify this parameter space while implementing current constraints from electroweak precision observable and Higgs boson property measurements as well as those implied by LHC heavy resonance searches. Implementing a proposed search strategy, we find that the heavy scalar and DM candidate can be probed up to 1 TeV and 450 GeV at 2σ level respectively. |
| first_indexed | 2024-03-08T14:20:35Z |
| format | Article |
| id | doaj.art-d8c112b858564c6f90c961171f2aba0e |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-08T14:20:35Z |
| publishDate | 2024-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-d8c112b858564c6f90c961171f2aba0e2024-01-14T12:06:44ZengSpringerOpenJournal of High Energy Physics1029-84792024-01-012024113410.1007/JHEP01(2024)051Testing complex singlet scalar cosmology at the Large Hadron ColliderWenxing Zhang0Yizhou Cai1Michael J. Ramsey-Musolf2Lei Zhang3Tsung-Dao Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong UniversityDepartment of Physics, Nanjing UniversityTsung-Dao Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong UniversityDepartment of Physics, Nanjing UniversityAbstract The Standard Model extended with a complex singlet scalar (cxSM) can admit a strong first order electroweak phase transition (SFOEWPT) as needed for electroweak baryogenesis and provide a dark matter (DM) candidate. The presence of both a DM candidate and a singlet-like scalar that mixes with the Standard Model Higgs boson leads to the possibility of a b b ¯ $$ b\overline{b} $$ + MET final state in pp collisions. Focusing on this channel, we analyze the prospective reach at the Large Hadron Collider (LHC) for a heavy singlet-like scalar in regions of cxSM parameter space compatible with a SFOEWPT and DM phenomenology. We identify this parameter space while implementing current constraints from electroweak precision observable and Higgs boson property measurements as well as those implied by LHC heavy resonance searches. Implementing a proposed search strategy, we find that the heavy scalar and DM candidate can be probed up to 1 TeV and 450 GeV at 2σ level respectively.https://doi.org/10.1007/JHEP01(2024)051Phase Transitions in the Early UniverseBaryo-and LeptogenesisModels for Dark MatterMulti-Higgs Models |
| spellingShingle | Wenxing Zhang Yizhou Cai Michael J. Ramsey-Musolf Lei Zhang Testing complex singlet scalar cosmology at the Large Hadron Collider Journal of High Energy Physics Phase Transitions in the Early Universe Baryo-and Leptogenesis Models for Dark Matter Multi-Higgs Models |
| title | Testing complex singlet scalar cosmology at the Large Hadron Collider |
| title_full | Testing complex singlet scalar cosmology at the Large Hadron Collider |
| title_fullStr | Testing complex singlet scalar cosmology at the Large Hadron Collider |
| title_full_unstemmed | Testing complex singlet scalar cosmology at the Large Hadron Collider |
| title_short | Testing complex singlet scalar cosmology at the Large Hadron Collider |
| title_sort | testing complex singlet scalar cosmology at the large hadron collider |
| topic | Phase Transitions in the Early Universe Baryo-and Leptogenesis Models for Dark Matter Multi-Higgs Models |
| url | https://doi.org/10.1007/JHEP01(2024)051 |
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