Analysis of the CP structure of the Yukawa coupling between the Higgs boson and τ leptons in proton-proton collisions at s = 13 TeV

• Published in: The journal of high energy physics Vol. 2022; no. 6; p. 12
• Main Authors: Krammer, N., Pitters, F. M., Schieck, J., Templ, S., Darwish, M. R., Thomas, L., Niedziela, M., Novaes, S. F., Ahmad, M., Iemmi, F., Bharthuar, S., Tuominen, E., Jarry, P., Beaudette, F., Busson, P., Charlot, C., Lomidze, I., Tsamalaidze, Z., Bin Anuar, A. A., Saibel, A., Wen, Y., Hajheidari, M., Rabbertz, K., Mandal, K., Bansal, S., Dutta, S., Sarkar, S., Mishra, D. K., Khakzad, M., Creanza, D., Castro, A., Rossi, A. M., Lucchini, M. T., Iorio, A. O. M., Lusiani, E., Moscatelli, F., Tornago, M., Belforte, S., Choi, S., Yang, S., Sanchez-Hernandez, A., Vazquez Valencia, F., Awan, M. I. M., Leonardo, N., Niknejad, T., Golovtcov, V., Uvarov, L., Nikitenko, A., Andreev, V., Dubinin, M., Elumakhov, D., Kachanov, V., Mandrik, P., Dordevic, M., León Holgado, J., de Trocóniz, J. F., Matorras-Cuevas, Pablo, Baechler, J., David, A., Lourenço, C., Berger, P., Zhu, D. H., Yu, P. r., Özçelik, Ö., Holmberg, M. l., Schuh, T., Winterbottom, D., McMaster, B., Gleyzer, S. V., West, C., Yu, D., Bonilla, J., Erbacher, R., Hamilton, D., Ignatenko, M., Stone, B., Hanson, G., Alison, J., Feng, Y., Gecse, Z., Mantilla, C., Koenig, E., Rawal, N., Sturdy, J., Noonan, D., Warner, Z., Mitchell, T., Palmer, C., Skuja, A., Klute, M., Stephans, G. S. F., Chauhan, S., McLean, C., Marzocchi, B., Morse, D. M., Bucci, R., Barnes, V. E., Geurts, F. J. M., Huang, T., Arenton, M. W.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 03.06.2022; Springer Nature B.V
• Subjects: Angular correlation; Classical and Quantum Gravitation; Collaboration; Confidence intervals; Couplings; Elementary Particles; Feasibility studies; Higgs bosons; High energy physics; Large Hadron Collider; Leptons; Luminosity; Particle collisions; Physics; Physics and Astronomy; Protons; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Experimental Physics; Relativity Theory; Sensors; Solenoids; Standard deviation; String Theory; Hadron-Hadron Scattering; Higgs Physics; Tau Physics
• ISSN: 1029-8479
• DOI: 10.1007/JHEP06(2022)012

A bstract The first measurement of the CP structure of the Yukawa coupling between the Higgs boson and τ leptons is presented. The measurement is based on data collected in proton-proton collisions at s = 13 TeV by the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb − 1 . The analysis uses the angular correlation between the decay planes of τ leptons produced in Higgs boson decays. The effective mixing angle between CP -even and CP -odd τ Yukawa couplings is found to be − 1 ± 19°, compared to an expected value of 0 ± 21° at the 68.3% confidence level. The data disfavour the pure CP -odd scenario at 3.0 standard deviations. The results are compatible with predictions for the standard model Higgs boson.