Study of WH production through vector boson scattering and extraction of the relative sign of the W and Z couplings to the Higgs boson in proton-proton collisions at √s = 13 TeV

Boos, E.; Bunichev, V.; Dubinin, M.; Dudko, L.; Ershov, A.A.; Klyukhin, V.; Kodolova, O.; Obraztsov, S.; Perfilov, M.; Savrin, V.; Volkov, P.; Vorotnikov, G.A.; CMS, C.

Авторы: Boos E., Bunichev V., Dubinin M., Dudko L., Ershov A.A., Klyukhin V., Kodolova O., Obraztsov S., Perfilov M., Savrin V., Volkov P., Vorotnikov G.A., CMS Collaboration
Журнал: Physics Letters B
Том: 860
Год издания: 2025
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 139202
DOI: 10.1016/j.physletb.2024.139202
Аннотация: A search for the production of a W boson and a Higgs boson through vector boson scattering (VBS) is presented, using CMS data from proton-proton collisions at √𝑠 = 13 TeV collected from 2016 to 2018. The integrated luminosity of the data sample is 138 fb−1. Selected events must be consistent with the presence of two jets originating from VBS, the leptonic decay of the W boson to an electron or muon, possibly also through an intermediate τ lepton, and a Higgs boson decaying into a pair of b quarks, reconstructed as either a single merged jet or two resolved jets. A measurement of the process as predicted by the standard model (SM) is performed alongside a study of beyond-the-SM (BSM) scenarios. The SM analysis sets an observed (expected) 95% confidence level upper limit of 14.3 (9.9) on the ratio of the measured VBS WH cross section to that expected by the SM. The BSM analysis, conducted within the so-called 𝜅 framework, excludes all scenarios with 𝜆_WZ < 0 that are consistent with current measurements, where 𝜆_WZ = 𝜅_W ∕𝜅_Z and 𝜅_W and 𝜅_Z are the HWW and HZZ coupling modifiers, respectively. The significance of the exclusion is beyond 5 standard deviations, and it is consistentwith the SM expectation of 𝜆_WZ = 1.
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Study of WH production through vector boson scattering and extraction of the relative sign of the W and Z couplings to the Higgs boson in proton-proton collisions at √s = 13 TeVстатья Исследовательская статья

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