Search for H→γγH→γγ produced in association with top quarks and constraints on the Yukawa coupling between the top quark and the Higgs boson using data taken at 7 TeV and 8 TeV with the ATLAS detector
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- A search is performed for Higgs bosons produced in association with top quarks using the diphoton decay mode of the Higgs boson. Selection requirements are optimized separately for leptonic and fully hadronic final states from the top quark decays. The dataset used corresponds to an integrated luminosity of 4.5 fb\(^{−1}\) of proton–proton collisions at a center-of-mass energy of 7 TeV and 20.3 fb−120.3 fb\(^{−1}\) at 8 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. No significant excess over the background prediction isA search is performed for Higgs bosons produced in association with top quarks using the diphoton decay mode of the Higgs boson. Selection requirements are optimized separately for leptonic and fully hadronic final states from the top quark decays. The dataset used corresponds to an integrated luminosity of 4.5 fb\(^{−1}\) of proton–proton collisions at a center-of-mass energy of 7 TeV and 20.3 fb−120.3 fb\(^{−1}\) at 8 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. No significant excess over the background prediction is observed and upper limits are set on the \(t\overline{t}H\) production cross section. The observed exclusion upper limit at 95% confidence level is 6.7 times the predicted Standard Model cross section value. In addition, limits are set on the strength of the Yukawa coupling between the top quark and the Higgs boson, taking into account the dependence of the \(t\overline{t}H\) and tH cross sections as well as the H→γγH→γγ branching fraction on the Yukawa coupling. Lower and upper limits at 95% confidence level are set at −1.3 and +8.0 times the Yukawa coupling strength in the Standard Model.…
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| URN: | urn:nbn:de:bvb:20-opus-136100 |
|---|---|
| Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
| Institute der Universität: | Fakultät für Physik und Astronomie / Physikalisches Institut |
| Sprache der Veröffentlichung: | Englisch |
| Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Physics Letters B |
| Erscheinungsjahr: | 2015 |
| Band / Jahrgang: | 740 |
| Seitenangabe: | 222–242 |
| Originalveröffentlichung / Quelle: | Physics Letters B 740 (2015) 222–242; doi:10.1016/j.physletb.2014.11.049 |
| DOI: | https://doi.org/10.1016/j.physletb.2014.11.049 |
| Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 53 Physik / 539 Moderne Physik |
| Freie Schlagwort(e): | Higgs boson; Yukawa coupling; diphoton decay; top quark |
| Datum der Freischaltung: | 13.07.2016 |
| Urhebende Körperschaft: | ATLAS Collaboration |
| Lizenz (Deutsch): |  CC BY: Creative-Commons-Lizenz: Namensnennung |