Reconstructing a light pseudoscalar in the Type-X two Higgs doublet model
We investigate the detectability as well as reconstructibility of a light pseudoscalar particle A, of mass in the 50–60 GeV range, which is still allowed in a Type-X (lepton-specific) two-Higgs doublet scenario. Such a pseudoscalar can be pair-produced in the decay h→AA of the 125 GeV scalar h. The...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-11-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269317307487 |
| _version_ | 1811327755646664704 |
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| author | Eung Jin Chun Siddharth Dwivedi Tanmoy Mondal Biswarup Mukhopadhyaya |
| author_facet | Eung Jin Chun Siddharth Dwivedi Tanmoy Mondal Biswarup Mukhopadhyaya |
| author_sort | Eung Jin Chun |
| collection | DOAJ |
| description | We investigate the detectability as well as reconstructibility of a light pseudoscalar particle A, of mass in the 50–60 GeV range, which is still allowed in a Type-X (lepton-specific) two-Higgs doublet scenario. Such a pseudoscalar can be pair-produced in the decay h→AA of the 125 GeV scalar h. The light pseudoscalar in the aforementioned range, helpful in explaining the muon anomalous magnetic moment, has not only substantial branching ratio in the τ+τ− channel but also one of about 0.35% in the μ+μ− final state. We show how to faithfully reconstruct the A mass using the μ+μ− mode, and establish the existence of a pseudoscalar around 50–60 GeV, using the process pp→h→AA→μ+μ−τ+τ−. This is the most reliable way of reconstructing the light A mass, with a statistical significance that amounts to discovery, with a few hundred (or less) fb−1 of integrated luminosity. |
| first_indexed | 2024-04-13T15:13:42Z |
| format | Article |
| id | doaj.art-ae2bc9ec8cda4104a2e9f778023e0dc8 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-04-13T15:13:42Z |
| publishDate | 2017-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-ae2bc9ec8cda4104a2e9f778023e0dc82022-12-22T02:41:56ZengElsevierPhysics Letters B0370-26931873-24452017-11-01774C202510.1016/j.physletb.2017.09.037Reconstructing a light pseudoscalar in the Type-X two Higgs doublet modelEung Jin Chun0Siddharth Dwivedi1Tanmoy Mondal2Biswarup Mukhopadhyaya3Korea Institute for Advanced Study, Seoul 02455, Republic of KoreaRegional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, HBNI, Chhatnag Road, Jhunsi, Allahabad 211 019, IndiaRegional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, HBNI, Chhatnag Road, Jhunsi, Allahabad 211 019, IndiaRegional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, HBNI, Chhatnag Road, Jhunsi, Allahabad 211 019, IndiaWe investigate the detectability as well as reconstructibility of a light pseudoscalar particle A, of mass in the 50–60 GeV range, which is still allowed in a Type-X (lepton-specific) two-Higgs doublet scenario. Such a pseudoscalar can be pair-produced in the decay h→AA of the 125 GeV scalar h. The light pseudoscalar in the aforementioned range, helpful in explaining the muon anomalous magnetic moment, has not only substantial branching ratio in the τ+τ− channel but also one of about 0.35% in the μ+μ− final state. We show how to faithfully reconstruct the A mass using the μ+μ− mode, and establish the existence of a pseudoscalar around 50–60 GeV, using the process pp→h→AA→μ+μ−τ+τ−. This is the most reliable way of reconstructing the light A mass, with a statistical significance that amounts to discovery, with a few hundred (or less) fb−1 of integrated luminosity.http://www.sciencedirect.com/science/article/pii/S0370269317307487Two Higgs doublet modelsHiggs physicsExtensions of Higgs sectorBeyond the standard modelLHC |
| spellingShingle | Eung Jin Chun Siddharth Dwivedi Tanmoy Mondal Biswarup Mukhopadhyaya Reconstructing a light pseudoscalar in the Type-X two Higgs doublet model Physics Letters B Two Higgs doublet models Higgs physics Extensions of Higgs sector Beyond the standard model LHC |
| title | Reconstructing a light pseudoscalar in the Type-X two Higgs doublet model |
| title_full | Reconstructing a light pseudoscalar in the Type-X two Higgs doublet model |
| title_fullStr | Reconstructing a light pseudoscalar in the Type-X two Higgs doublet model |
| title_full_unstemmed | Reconstructing a light pseudoscalar in the Type-X two Higgs doublet model |
| title_short | Reconstructing a light pseudoscalar in the Type-X two Higgs doublet model |
| title_sort | reconstructing a light pseudoscalar in the type x two higgs doublet model |
| topic | Two Higgs doublet models Higgs physics Extensions of Higgs sector Beyond the standard model LHC |
| url | http://www.sciencedirect.com/science/article/pii/S0370269317307487 |
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