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Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at √s = 13TeV

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dc.contributor.author CMS Collaboration
dc.contributor.author Sirunyan, A. M.
dc.contributor.author DUBE, SOURABH
dc.contributor.author KANSAL, B.
dc.contributor.author MAURYA, M. K.
dc.contributor.author PANDEY, S.
dc.contributor.author RANE, A.
dc.contributor.author RASTOGI, A.
dc.contributor.author SHARMA, SEEMA et al.
dc.date.accessioned 2022-06-20T04:26:25Z
dc.date.available 2022-06-20T04:26:25Z
dc.date.issued 2021-04
dc.identifier.citation European Physical Journal C, 81, 378. en_US
dc.identifier.issn 1434-6052
dc.identifier.uri https://doi.org/10.1140/epjc/s10052-021-09014-x en_US
dc.identifier.uri http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7112
dc.description.abstract The rate for Higgs (H) bosons production in association with either one (tH) or two (tt¯H) top quarks is measured in final states containing multiple electrons, muons, or tau leptons decaying to hadrons and a neutrino, using proton–proton collisions recorded at a center-of-mass energy of 13TeV by the CMS experiment. The analyzed data correspond to an integrated luminosity of 137fb−1. The analysis is aimed at events that contain H→WW, H→ττ, or H→ZZ decays and each of the top quark(s) decays either to lepton+jets or all-jet channels. Sensitivity to signal is maximized by including ten signatures in the analysis, depending on the lepton multiplicity. The separation among tH, tt¯H, and the backgrounds is enhanced through machine-learning techniques and matrix-element methods. The measured production rates for the tt¯H and tH signals correspond to 0.92±0.19(stat)+0.17−0.13(syst) and 5.7±2.7(stat)±3.0(syst) of their respective standard model (SM) expectations. The corresponding observed (expected) significance amounts to 4.7 (5.2) standard deviations for tt¯H, and to 1.4 (0.3) for tH production. Assuming that the Higgs boson coupling to the tau lepton is equal in strength to its expectation in the SM, the coupling yt of the Higgs boson to the top quark divided by its SM expectation, κt=yt/ySMt, is constrained to be within −0.9<κt<−0.7 or 0.7<κt<1.1, at 95% confidence level. This result is the most sensitive measurement of the tt¯H production rate to date. en_US
dc.language.iso en en_US
dc.publisher Springer Nature en_US
dc.subject Physics en_US
dc.subject 2021 en_US
dc.title Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at √s = 13TeV en_US
dc.type Article en_US
dc.contributor.department Dept. of Physics en_US
dc.identifier.sourcetitle European Physical Journal C en_US
dc.publication.originofpublisher Foreign en_US


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