Search for top quark decays \(t → qH\), with \(H → γγ\), in \(\sqrt{s} = 13\) TeV \(pp\) collisions using the ATLAS detector
Please always quote using this URN: urn:nbn:de:bvb:20-opus-172568
- This article presents a search for flavour-changing neutral currents in the decay of a top quark into an up-type (\({q = c, u}\)) quark and a Higgs boson, where the Higgs boson decays into two photons. The proton-proton collision data set analysed amounts to 36.1 fb\(^{−1}\) at \(\sqrt{s} = 13\) TeV collected by the ATLAS experiment at the LHC. Top quark pair events are searched for, where one top quark decays into \(qH\) and the other decays into \(bW\). Both the hadronic and leptonic decay modes of the \(W\) boson are used. No significantThis article presents a search for flavour-changing neutral currents in the decay of a top quark into an up-type (\({q = c, u}\)) quark and a Higgs boson, where the Higgs boson decays into two photons. The proton-proton collision data set analysed amounts to 36.1 fb\(^{−1}\) at \(\sqrt{s} = 13\) TeV collected by the ATLAS experiment at the LHC. Top quark pair events are searched for, where one top quark decays into \(qH\) and the other decays into \(bW\). Both the hadronic and leptonic decay modes of the \(W\) boson are used. No significant excess is observed and an upper limit is set on the \({t → cH}\) branching ratio of 2.2 × 10\(^{−3}\) at the 95% confidence level, while the expected limit in the absence of signal is 1.6 × 10\(^{−3}\). The corresponding limit on the \(tcH\) coupling is 0.090 at the 95% confidence level. The observed upper limit on the \({t → uH}\) branching ratio is 2.4 × 10\(^{−3}\).…
URN: | urn:nbn:de:bvb:20-opus-172568 |
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Document Type: | Journal article |
Faculties: | Fakultät für Physik und Astronomie |
Language: | English |
Parent Title (English): | Journal of High Energy Physics |
Year of Completion: | 2017 |
Volume: | 2017 |
Issue: | 10 |
Article Number: | 129 |
Source: | Journal of High Energy Physics (2017) 10:129. https://doi.org/10.1007/JHEP10(2017)129 |
DOI: | https://doi.org/https://doi.org/10.1007/JHEP10(2017)129 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 539 Moderne Physik |
Tag: | Flavour changing neutral currents; Hadron-Hadron scattering (experiments); Higgs physics; High energy physics; Top physics |
Release Date: | 2021/05/25 |
Creating Corporation: | The ATLAS Collaboration |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |