Search For Nonresonant Higgs Boson Pair Production İn Final States With Two Bottom Quarks And Two Photons in Proton-Proton Collisions at root s=13 TeV

dc.authorid291820en_US
dc.contributor.authorGüler, Emine Gürpınar
dc.contributor.author.;, ve diğer
dc.date.accessioned2021-09-03T12:05:26Z
dc.date.available2021-09-03T12:05:26Z
dc.date.issued2021
dc.departmentİstanbul Beykent Üniversitesien_US
dc.description.abstractA search for nonresonant production of Higgs boson pairs via gluon-gluon and vector boson fusion processes in final states with two bottom quarks and two photons is presented. The search uses data from proton-proton collisions at a center-of-mass energy of root s = 13 TeV recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb(-1). No significant deviation from the background-only hypothesis is observed. An upper limit at 95% confidence level is set on the product of the Higgs boson pair production cross section and branching fraction into gamma gamma b (b) over bar. The observed (expected) upper limit is determined to be 0.67 (0.45) fb, which corresponds to 7.7 (5.2) times the standard model prediction. This search has the highest sensitivity to Higgs boson pair production to date. Assuming all other Higgs boson couplings are equal to their values in the standard model, the observed coupling modifiers of the trilinear Higgs boson self-coupling kappa(lambda) and the coupling between a pair of Higgs bosons and a pair of vector bosons c(2V) are constrained within the ranges -3.3 < kappa(lambda) < 8.5 and -1.3 < c(2V) < 3.5 at 95% confidence level. Constraints on kappa(lambda) are also set by combining this analysis with a search for single Higgs bosons decaying to two photons, produced in association with top quark-antiquark pairs, and by performing a simultaneous fit of kappa(lambda) and the top quark Yukawa coupling modifier kappa(t).en_US
dc.identifier.citationJournal Of Hıgh Energy Physıcs Issue 3 Article Number 257en_US
dc.identifier.doi10.1007/JHEP03(2021)257
dc.identifier.issn2076-3417
dc.identifier.scopus2-s2.0-85104250522en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1007/JHEP03(2021)257
dc.identifier.wosWOS:000637504600001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringer Verlag [Commercial Publisher]en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.subjectHadron-Hadron scattering (experiments)en_US
dc.subjectHiggs physicsen_US
dc.titleSearch For Nonresonant Higgs Boson Pair Production İn Final States With Two Bottom Quarks And Two Photons in Proton-Proton Collisions at root s=13 TeVen_US
dc.typeArticleen_US

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