Search for top quark decays t → qH, with H → γγ, in √s=13 TeV pp collisions using the ATLAS detector
(2017) In Journal of High Energy Physics 2017(10).- Abstract
- 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 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... (More)
- 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 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.[Figure not available: see fulltext.]. © 2017, The Author(s). (Less)
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- author
- author collaboration
- organization
- publishing date
- 2017
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Flavour Changing Neutral Currents, Hadron-Hadron scattering (experiments), Higgs physics, Top physics
- in
- Journal of High Energy Physics
- volume
- 2017
- issue
- 10
- article number
- 129
- publisher
- Springer
- external identifiers
-
- scopus:85032387490
- ISSN
- 1029-8479
- DOI
- 10.1007/JHEP10(2017)129
- language
- English
- LU publication?
- yes
- additional info
- Export Date: 8 November 2017
- id
- 5f6eb561-43f7-4a62-8c28-99a6251e8905
- date added to LUP
- 2017-11-08 10:09:05
- date last changed
- 2023-04-08 02:08:52
@article{5f6eb561-43f7-4a62-8c28-99a6251e8905, abstract = {{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 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.[Figure not available: see fulltext.]. © 2017, The Author(s).}}, author = {{Aaboud, M and Aad, G and Abbott, B. and Abdinov, O and Abeloos, B and Abidi, S. H. and Åkesson, Torsten and Bocchetta, Simona and Doglioni, Caterina and Hedberg, Vincent and Jarlskog, Göran and Kalderon, Charles and Lytken, Else and Mankinen, Katja and Mjörnmark, Ulf and Pöttgen, Ruth and Poulsen, Trine and Smirnova, Oxana and Viazlo, Oleksandr}}, issn = {{1029-8479}}, keywords = {{Flavour Changing Neutral Currents; Hadron-Hadron scattering (experiments); Higgs physics; Top physics}}, language = {{eng}}, number = {{10}}, publisher = {{Springer}}, series = {{Journal of High Energy Physics}}, title = {{Search for top quark decays t → qH, with H → γγ, in √s=13 TeV pp collisions using the ATLAS detector}}, url = {{http://dx.doi.org/10.1007/JHEP10(2017)129}}, doi = {{10.1007/JHEP10(2017)129}}, volume = {{2017}}, year = {{2017}}, }