Search for nonresonant Higgs boson pair production in the four leptons plus twob jets final state in proton-proton collisions at s = 13 TeV

• Published in: The journal of high energy physics 2023-06, Vol.2023 (6), p.130
• Main Authors: Van Doninck, W., Samalan, A., Vermassen, B., Benecke, A., Barroso Ferreira Filho, M., Wang, J., Mao, Y., Lu, C., Avila, C., Denegri, D., Diab, B., Fontana Santos Alves, B. A., Ochando, C., Zghiche, A., Chabert, E. C., Meuser, D., Meyer, A., Mondal, S., Mukherjee, S., Behnke, O., Ribeiro Lopes, B., Rübenach, J., Wiens, L., Savoiu, D., Shvetsov, I., Zuo, X., Gianneios, P., Pásztor, G., Aziz, T., Kumar, M., Suryadevara, P., Kumar, S., Nayak, A., Pandey, S., Pellecchia, A., Masetti, G., Rossi, A. M., Siroli, G. P., Robutti, E., Tosi, M., Calzaferri, S., Bruschini, D., Mandorli, G., Soffi, L., Mariotti, C., Choi, S., Yang, S., Rinkevicius, A., Benitez, J. F., Khan, W. A., Alcaraz Maestre, J., Gonzalez Caballero, I., Rodríguez Bouza, V., Florent, A., Lecoq, P., Lourenço, C., Maier, B., Ebrahimi, A., Schweiger, K., Rout, P. K., Gurpinar Guler, E., Turkcapar, S., Stylianou, N., Brown, C. E., Davies, J., Kwon, T., Brainerd, C., Yao, Y., Regnard, S., Mei, H., Karathanasis, G., Mantilla, C., McBride, P., Pastika, N., Reinsvold Hall, A., Weber, H. A., Askew, A., Baarmand, M. M., Kumar Verma, R., Cali, I. A., Cremaldi, L. M., Hay, L., Marzocchi, B., Morse, D. M., Kwan, S., Jung, A. W., Geurts, F. J. M., de Barbaro, P., Taus, R., Heindl, M., Huang, T., Hegde, V., Borshch, V., Dermenev, A., Perelygin, V., Petrushanko, S., Savrin, V., Shalaev, V., Uzunian, A., Zarubin, A.
• Format: Article
• Language: English
• Subjects: Classical and Quantum Gravitation; Collaboration; Collisions; Confidence intervals; Coupling; Elementary Particles; Higgs bosons; High energy physics; Kinematics; Leptons; Luminosity; Pair production; Physics; Physics and Astronomy; Protons; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Experimental Physics; Relativity Theory; Sensors; Signal strength; String Theory
• ISSN: 1029-8479
• DOI: 10.1007/JHEP06(2023)130

A bstract The first search for nonresonant production of Higgs boson pairs (HH) with one H decaying into four leptons and the other into a pair of b quarks is presented, using proton-proton collisions recorded at a center-of-mass energy of s = 13 TeV by the CMS experiment. The analyzed data correspond to an integrated luminosity of 138 fb − 1 . A 95% confidence level upper limit of 32.4 is set on the signal strength modifier μ , defined as the ratio of the observed HH production rate in the HH → ZZ ∗ b b ¯ → 4 ℓ b b ¯ decay channel to the standard model (SM) expectation. Possible modifications of the H trilinear coupling λ HHH with respect to the SM value are investigated. The coupling modifier κ λ , defined as λ HHH divided by its SM prediction, is constrained to be within the observed (expected) range − 8 . 8 ( − 9 . 8) < κ λ < 13 . 4 (15 . 0) at 95% confidence level.