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Measurement of inclusive and differential cross sections for W+W− production in proton-proton collisions at s=13.6 TeV

par Bilin, Bugra ;Clerbaux, Barbara ;Das, Aloke Kumar ;De Lentdecker, Gilles ;Evard, Hugues ;Favart, Laurent ;Gianneios, Paraskevas ;Khalilzadeh, Ali ;Mahdavikhorrami, Mostafa ;Malara, Andrea ;Paredes, Sergio ;Shahzad, Muhammad Aamir ;Vanden Bemden, Max ;Vander Velde, Catherine ;Vanlaer, Pascal ;Hayrapetyan, A.;Jaramillo Gallego, Johny ; [et al.]
Référence Physics Letters B, 861, 139231
Publication Publié, 2025-10-01

Article révisé par les pairs

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Résumé :

Measurements at s=13.6TeV of the opposite-sign W boson pair production cross section in proton-proton collisions are presented. The data used in this study were collected with the CMS detector at the CERN LHC in 2022, and correspond to an integrated luminosity of 34.8fb−1. Events are selected by requiring one electron and one muon of opposite charge. A maximum likelihood fit is performed on signal- and background-enriched data categories defined by the flavor and charge of the leptons, the number of jets, and number of jets originating from b quarks. The overall sensitivity is significantly better than that of previous results with a similar integrated luminosity. The improvement comes from a more refined control of experimental uncertainties and an improved fit strategy. An inclusive W+W− production cross section of 125.7±5.6 pb is measured, in agreement with standard model predictions. Cross sections are also reported in a fiducial region close to that of the detector acceptance, both inclusively and differentially, as a function of the jet multiplicity in the event. For the first time in proton-proton collisions, WW events with zero, one, and at least two jets are studied simultaneously and compared with recent theoretical predictions