Search for flavour-changing neutral tqH interactions with H → γγ in pp collisions at √s = 13 TeV using the ATLAS detector

Beck, H.P.; Chatterjee, M.; Dal Santo, D.; Halser, L.; Mobius, S.; O'Neill, A.P.; Schefer, M.M.; Weber, M.S. (2023). Search for flavour-changing neutral tqH interactions with H → γγ in pp collisions at √s = 13 TeV using the ATLAS detector. Journal of High Energy Physics, 2023(12) Springer 10.1007/JHEP12(2023)195

[img]
Preview
Text
JHEP12_2023_195.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (2MB) | Preview

A search for flavour-changing neutral interactions involving the top quark, the Higgs boson and an up-type quark q (q = c, u) is presented. The proton-proton collision data set used, with an integrated luminosity of 139 fb−1, was collected at √s = 13 TeV by the ATLAS experiment at the Large Hadron Collider. Both the decay process t → qH in production and the production process pp → tH, with the Higgs boson decaying into two photons, are investigated. No significant excess is observed and upper limits are set on the t → cH and the t → uH branching ratios of 4.3 × 10−4 and 3.8 × 10−4, respectively, at the 95% confidence level, while the expected limits in the absence of signal are 4.7 × 10−4 and 3.9 × 10−4. Combining this search with ATLAS searches in the H → τ+τ− and H → final states yields observed (expected) upper limits on the t → cH branching ratio of 5.8 × 10−4 (3.0 × 10−4) at the 95% confidence level. The corresponding observed (expected) upper limit on the t → uH branching ratio is 4.0 × 10−4 (2.4 × 10−4).

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)

UniBE Contributor:

Beck, Hans Peter, Chatterjee, Meghranjana, Dal Santo, Daniele, Halser, Lea, Möbius, Silke, O'Neill, Aaron Paul, Schefer, Meinrad Moritz, Weber, Michele

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

31 Jan 2024 11:11

Last Modified:

30 Jun 2024 02:19

Publisher DOI:

10.1007/JHEP12(2023)195

Additional Information:

Kollaboration - Es sind nur die Berner Autor*innen namentlich erwaehnt; the ATLAS collaboration

Uncontrolled Keywords:

Flavour Changing Neutral Currents, Hadron-Hadron Scattering, Higgs Physics, Top Physics

BORIS DOI:

10.48350/191805

URI:

https://boris.unibe.ch/id/eprint/191805

Actions (login required)

Edit item Edit item
Provide Feedback