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

The CMS collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number139231
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume861
DOIs
StatePublished - 1 Feb 2025
Externally publishedYes

Keywords

  • CMS
  • W boson pairs

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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