Searches for additional Higgs bosons and for vector leptoquarks in ττ final states in proton-proton collisions at s = 13 TeV

• Published in: The journal of high energy physics 2023-07, Vol.2023 (7), p.73
• Main Authors: Van Doninck, W., Vermassen, B., Benecke, A., Barroso Ferreira Filho, M., Chen, M., Liu, Z.-A., Zhang, H., Lu, C., Avila, C., Denegri, D., Diab, B., Fontana Santos Alves, B. A., Ochando, C., Depasse, P., Laktineh, I. B., Röwert, N., Meyer, A., Brunner, D., Schütze, P., Wang, Q., Wen, Y., Mrowietz, M., Paasch, A., Müller, Th, Adamidis, K., Kamtsikis, C., Mandal, K., Singla, A., Kumar, A., Guchait, M., Etesami, S. M., Ramos, D., Simone, F. M., Abbiendi, G., Siroli, G. P., Civinini, C., Cetorelli, F., Fabozzi, F., Carlin, R., Tosi, M., Zumerle, G., Campana, M., Arneodo, M., Choi, M., Perez Navarro, D. A., Hoorani, H. R., Bluj, M., Górski, M., Fouz, M. C., Dharmaratna, W. G. D., Gouskos, L., Haranko, M., Qu, H., Racz, A., Wozniak, K. A., Missiroli, M., Del Burgo, R., Gülmez, E., Hos, I., Brooke, J. J., Clement, E., Heath, G. P., Cooke, C., Newbold, D. M., Virdee, T., Buccilli, A., West, C., Cutts, D., Lau, K. T., Sarica, U., Ferguson, T., Patel, R., Fan, J., Reid, M., Wittich, P., Berry, D., Cerati, G. B., Grünendahl, S., Pastika, N., Cherepanov, V., Guerrero, D., Ye, Z., Emediato, L., McLean, C., Lidrych, J., Gilbert, A., Schmitt, M. H., Mariano, J., Malik, S., Jaroslawski, D., Hegde, V., Romeo, F., Bose, T., Lanaro, A., Loeliger, A., Aushev, T., Lychkovskaya, N., Radchenko, O., Shalaev, V., Slabospitskii, S.
• Format: Article
• Language: English
• Subjects: Bosons; Classical and Quantum Gravitation; Collisions; Confidence intervals; Elementary Particles; Gluons; Higgs bosons; High energy physics; Large Hadron Collider; Leptons; Luminosity; Physics; Physics and Astronomy; Protons; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Experimental Physics; Relativity Theory; Searching; Solenoids; String Theory
• ISSN: 1029-8479
• DOI: 10.1007/JHEP07(2023)073

A bstract Three searches are presented for signatures of physics beyond the standard model (SM) in ττ final states in proton-proton collisions at the LHC, using a data sample collected with the CMS detector at s = 13 TeV, corresponding to an integrated luminosity of 138 fb − 1 . Upper limits at 95% confidence level (CL) are set on the products of the branching fraction for the decay into τ leptons and the cross sections for the production of a new boson ϕ , in addition to the H(125) boson, via gluon fusion (gg ϕ ) or in association with b quarks, ranging from O (10 pb) for a mass of 60 GeV to 0.3 fb for a mass of 3.5 TeV each. The data reveal two excesses for gg ϕ production with local p -values equivalent to about three standard deviations at m ϕ = 0 . 1 and 1.2 TeV. In a search for t -channel exchange of a vector leptoquark U 1 , 95% CL upper limits are set on the dimensionless U 1 leptoquark coupling to quarks and τ leptons ranging from 1 for a mass of 1 TeV to 6 for a mass of 5 TeV, depending on the scenario. In the interpretations of the M h 125 and M h , EFT 125 minimal supersymmetric SM benchmark scenarios, additional Higgs bosons with masses below 350 GeV are excluded at 95% CL.