SciPost Submission Page
Tau leptons as a tool to investigate the CP properties of the Higgs boson at CMS
by Andrea Cardini, on behalf of the CMS Collaboration
Submission summary
| Authors (as registered SciPost users): | Andrea Cardini |
| Submission information | |
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| Preprint Link: | scipost_202111_00038v1 (pdf) |
| Date accepted: | 2024-12-23 |
| Date submitted: | 2021-11-20 23:13 |
| Submitted by: | Cardini, Andrea |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 16th International Workshop on Tau Lepton Physics (TAU2021) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
Among the Higgs boson decay channels, the one to tau leptons can offer insight into the properties of the Higgs boson. The structure under CP symmetry of the tau Yukawa coupling was investigated in CMS by reconstructing the decay planes of the two tau leptons and measuring their angular separation. Tau decay planes are reconstructed depending on the studied decay channel to take advantage of the correlation between the tau lepton spin and the momenta of its decay products. Using the data collected during the LHC Run 2 data-taking period, the study revealed that the Yukawa coupling is largely dominated by a pure CP-even component. A pure CP-odd Yukawa coupling is excluded with a 99.7% confidence level allowing to constrain the allowed phase space for possible BSM scenarios.
Current status:
Editorial decision:
For Journal SciPost Physics Proceedings: Publish
(status: Editorial decision fixed and (if required) accepted by authors)
Reports on this Submission
Report #1 by Swagato Banerjee (Referee 1) on 2024-11-27 (Invited Report)
Report
The CP symmetry of the Yukawa coupling of the tau lepton has been investigated by the CMS experiment in decays of the Higgs boson to a pair of tau leptons. The angular correlation between the decay planes of the tau leptons are sensitive to the correlation between the tau lepton spin and the momenta of its decay products, which provides experimentally measureable quantities even if the direction of tau lepton cannot be measured because of missing neutrinos. Using the data collected during the LHC Run 2 data-taking period, the study revealed that the Yukawa coupling is largely dominated by a pure CP-even component. A pure CP-odd Yukawa coupling is excluded with a 99.7% confidence level allowing to constrain the allowed phase space for possible BSM scenarios.
Recommendation
Publish (surpasses expectations and criteria for this Journal; among top 10%)