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...
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doaj-ae2bc9ec8cda4104a2e9f778023e0dc82020-11-24T21:26:09ZengElsevierPhysics 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 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Eung Jin Chun Siddharth Dwivedi Tanmoy Mondal Biswarup Mukhopadhyaya |
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 |
author_facet |
Eung Jin Chun Siddharth Dwivedi Tanmoy Mondal Biswarup Mukhopadhyaya |
author_sort |
Eung Jin Chun |
title |
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_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_sort |
reconstructing a light pseudoscalar in the type-x two higgs doublet model |
publisher |
Elsevier |
series |
Physics Letters B |
issn |
0370-2693 1873-2445 |
publishDate |
2017-11-01 |
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. |
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 |
work_keys_str_mv |
AT eungjinchun reconstructingalightpseudoscalarinthetypextwohiggsdoubletmodel AT siddharthdwivedi reconstructingalightpseudoscalarinthetypextwohiggsdoubletmodel AT tanmoymondal reconstructingalightpseudoscalarinthetypextwohiggsdoubletmodel AT biswarupmukhopadhyaya reconstructingalightpseudoscalarinthetypextwohiggsdoubletmodel |
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1725980642082029568 |