Search for exotic decays of the Higgs boson into long-lived particles in pp collisions at root s=13 TeV using displaced vertices in the ATLAS inner detector

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dc.contributor.authorAad, G.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbbott, D. C.
dc.contributor.authorAbud, A. Abed
dc.contributor.authorAbeling, K.
dc.contributor.authorAbhayasinghe, D. K.
dc.contributor.authorAbidi, S. H.
dc.contributor.authorAbramowicz, H.
dc.date.accessioned2021-12-27T13:29:46Z
dc.date.available2021-12-27T13:29:46Z
dc.date.issued2021en_US
dc.departmentÄ°stinye Ãœniversitesien_US
dc.description.abstractA novel search for exotic decays of the Higgs boson into pairs of long-lived neutral particles, each decaying into a bottom quark pair, is performed using 139 fb(-1)of root s = 13 TeV proton-proton collision data collected with the ATLAS detector at the LHC. Events consistent with the production of a Higgs boson in association with a leptonically decaying Z boson are analysed. Long-lived particle (LLP) decays are reconstructed from inner-detector tracks as displaced vertices with high mass and track multiplicity relative to Standard Model processes. The analysis selection requires the presence of at least two displaced vertices, effectively suppressing Standard Model backgrounds. The residual background contribution is estimated using a data-driven technique. No excess over Standard Model predictions is observed, and upper limits are set on the branching ratio of the Higgs boson to LLPs. Branching ratios above 10% are excluded at 95% confidence level for LLP mean proper lifetimes c tau as small as 4 mm and as large as 100 mm. For LLP masses below 40 GeV, these results represent the most stringent constraint in this lifetime regime.en_US
dc.identifier.citationATLAS Collaboration. (2021). Search for exotic decays of the Higgs boson into long-lived particles in $ pp $ collisions at $\sqrt {s}= 13$ TeV using displaced vertices in the ATLAS inner detector. arXiv preprint arXiv:2107.06092.en_US
dc.identifier.doi10.1007/JHEP11(2021)229en_US
dc.identifier.issn1029-8479en_US
dc.identifier.issue11en_US
dc.identifier.scopus2-s2.0-85121293715en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1007/JHEP11(2021)229
dc.identifier.urihttps://hdl.handle.net/20.500.12713/2354
dc.identifier.wosWOS:000729777000001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSPRINGERen_US
dc.relation.ispartofJOURNAL OF HIGH ENERGY PHYSICSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectExoticsen_US
dc.subjectHadron-Hadron Scattering (experiments)en_US
dc.subjectHiggs Physicsen_US
dc.subjectProton-Proton Scatteringen_US
dc.subjectLifetimeen_US
dc.titleSearch for exotic decays of the Higgs boson into long-lived particles in pp collisions at root s=13 TeV using displaced vertices in the ATLAS inner detectoren_US
dc.typeArticleen_US

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