Analysis of the CP structure of the Yukawa coupling between the Higgs boson and tau leptons in proton-proton collisions at √s=13.6 TeV

@article{collaboration2026analysis,
  title = {{Analysis of the CP structure of the Yukawa coupling between the Higgs boson and tau leptons in proton-proton collisions at $$ \sqrts=13.6 $$ TeV}},
  author = {The CMS collaboration and A. Gevorgyan and A. Hayrapetyan and V. Makarenko and A. Tumasyan and W. Adam and L. Benato and T. Bergauer and M. Dragicevic and S. Gundacker and A. K. Guven and P. S. Hussain and M. Jeitler and N. Krammer and A. Li and D. Liko and M. Matthewman and J. Schieck and R. Schöfbeck and M. Shooshtari and M. Sonawane and N. Van Den Bossche and W. Waltenberger and C.-E. Wulz and T. Janssen and D. Ocampo Henao and T. Van Laer and P. Van Mechelen and D. Ahmadi and J. Bierkens and N. Breugelmans and S. Dansana and A. De Moor and M. Delcourt and S. Duponcheel and C. Gupta and F. Heyen and Y. Hong and K. Kang and P. Kashko and S. Lowette and I. Makarenko and S. Nandakumar and J. Niedziela and S. Tavernier and M. Tytgat and G. P. Van Onsem and S. Van Putte and T. Wybouw and A. Beshr and B. Bilin and F. Caviglia Roman and B. Clerbaux and A. K. Das and I. De Bruyn and G. De Lentdecker and E. Ducarme and H. Evard and L. Favart and I. Kalaitzidou},
  journal = {Journal of High Energy Physics},
  year = {2026},
  month = oct,
  doi = {10.1007/jhep10(2026)084},
  url = {https://link.springer.com/article/10.1007/JHEP10(2026)084},
  note = {CC BY 4.0},
}

TY  - JOUR
TI  - Analysis of the CP structure of the Yukawa coupling between the Higgs boson and tau leptons in proton-proton collisions at √s=13.6 TeV
AU  - The CMS collaboration
AU  - A. Gevorgyan
AU  - A. Hayrapetyan
AU  - V. Makarenko
AU  - A. Tumasyan
AU  - W. Adam
AU  - L. Benato
AU  - T. Bergauer
AU  - M. Dragicevic
AU  - S. Gundacker
AU  - A. K. Guven
AU  - P. S. Hussain
AU  - M. Jeitler
AU  - N. Krammer
AU  - A. Li
AU  - D. Liko
AU  - M. Matthewman
AU  - J. Schieck
AU  - R. Schöfbeck
AU  - M. Shooshtari
AU  - M. Sonawane
AU  - N. Van Den Bossche
AU  - W. Waltenberger
AU  - C.-E. Wulz
AU  - T. Janssen
AU  - D. Ocampo Henao
AU  - T. Van Laer
AU  - P. Van Mechelen
AU  - D. Ahmadi
AU  - J. Bierkens
AU  - N. Breugelmans
AU  - S. Dansana
AU  - A. De Moor
AU  - M. Delcourt
AU  - S. Duponcheel
AU  - C. Gupta
AU  - F. Heyen
AU  - Y. Hong
AU  - K. Kang
AU  - P. Kashko
AU  - S. Lowette
AU  - I. Makarenko
AU  - S. Nandakumar
AU  - J. Niedziela
AU  - S. Tavernier
AU  - M. Tytgat
AU  - G. P. Van Onsem
AU  - S. Van Putte
AU  - T. Wybouw
AU  - A. Beshr
AU  - B. Bilin
AU  - F. Caviglia Roman
AU  - B. Clerbaux
AU  - A. K. Das
AU  - I. De Bruyn
AU  - G. De Lentdecker
AU  - E. Ducarme
AU  - H. Evard
AU  - L. Favart
AU  - I. Kalaitzidou
PY  - 2026
DA  - 2026/10/08
JO  - Journal of High Energy Physics
DO  - 10.1007/jhep10(2026)084
UR  - https://link.springer.com/article/10.1007/JHEP10(2026)084
AB  - A bstract : This paper presents a measurement of the charge-parity ( CP ) structure of the Yukawa coupling between the Higgs boson (H) and tau leptons, using proton-proton collision data at √s=13.6 s = 13.6 TeV recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 62.4 fb − 1 . Angular correlations between the decay products of tau leptons produced in H → ττ decays are exploited to constrain the effective CP mixing angle α H ττ , which parameterizes the admixture of scalar and pseudoscalar couplings. The mixing angle is measured to be α^Hτ τ=(36_−30^+33)^^∘ α H ττ = 36 − 30 + 33 ° , compared with an expected value of (0 ± 19) ° under the standard model hypothesis. When combined with the previous CMS measurement using data collected at √s=13 s = 13 TeV, corresponding to an integrated luminosity of 138 fb − 1 , the mixing angle is determined to be (7 ± 16) ° , with an expected value of (0 ± 14) ° . This result represents the most precise measurement by CMS of the CP nature of the Higgs boson coupling to tau leptons, with an expected precision that is the best achieved by any experiment to date.
SN  - 1029-8479
ER  -