Aad, G;
Abbott, B;
Abbott, DC;
Abeling, K;
Abidi, SH;
Aboulhorma, A;
Abramowicz, H;
... Arena, E; + view all
(2024)
Probing the CP nature of the top–Higgs Yukawa coupling in tt¯H and tH events with H→bb¯ decays using the ATLAS detector at the LHC.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
, 849
, Article 138469. 10.1016/j.physletb.2024.138469.
Preview |
Text
1-s2.0-S0370269324000285-main.pdf - Published Version Download (2MB) | Preview |
Abstract
The CP properties of the coupling between the Higgs boson and the top quark are investigated using 139 fb−1 of proton–proton collision data recorded by the ATLAS experiment at the LHC at a centre-of-mass energy of s=13 TeV. The CP structure of the top quark–Higgs boson Yukawa coupling is probed in events with a Higgs boson decaying into a pair of b-quarks and produced in association with either a pair of top quarks, tt¯H, or a single top quark, tH. Events containing one or two electrons or muons are used for the measurement. Multivariate techniques are used to select regions enriched in tt¯H and tH events, where dedicated CP-sensitive observables are exploited. In an extension of the Standard Model (SM) with a CP-odd admixture in the top–Higgs Yukawa coupling, the mixing angle between CP-even and CP-odd couplings is measured to be α=11−73∘∘+52∘, compatible with the SM prediction corresponding to α=0.
| Type: | Article |
|---|---|
| Title: | Probing the CP nature of the top–Higgs Yukawa coupling in tt¯H and tH events with H→bb¯ decays using the ATLAS detector at the LHC |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.physletb.2024.138469 |
| Publisher version: | http://dx.doi.org/10.1016/j.physletb.2024.138469 |
| Language: | English |
| Additional information: | © 2024 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10188212 |
Archive Staff Only
 |
View Item |
