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Measurement of $\textit{CP}$ structure of Higgs-tau Yukawa coupling
by Vinaya Krishnan MB (behalf of CMS collaboration)
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Submission summary
| Authors (as registered SciPost users): | Vinaya Krishnan Mb |
| Submission information | |
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| Preprint Link: | scipost_202108_00025v1 (pdf) |
| Date submitted: | 2021-08-13 12:04 |
| Submitted by: | Mb, Vinaya Krishnan |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
The CMS experiment at LHC has performed the first measurement of the CP structure of the Yukawa coupling between the Higgs boson and tau leptons. The measurement is based on data collected in proton-proton collisions at $\sqrt{s} = 13$ TeV during 2016-18, corresponding to an integrated luminosity of $137\text{ fb}^{-1}$. The analysis utilizes the angular correlation between the decay planes of tau leptons produced in Higgs boson decays, where dedicated analysis techniques are used to optimise the reconstruction of tau decay planes. The measured value of CP mixing angle is $4\pm17^{\circ}$, at $68\%$ confidence level. The pure $\textit{CP-}$odd hypothesis is excluded by $3.2$ standard deviations. The analysis strategies and the results of the measurement are presented.