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March 7, 2026

Measurements of the electroweak diboson production cross sections in proton-proton collisions at s = 5. 02 TeV using leptonic decays

Key Points

To measure the diboson production cross sections in proton-proton collisions at 5.02 TeV.
Analyzed data collected with the CMS detector at the LHC.
Focused on events with two, three, or four charged light leptons (electrons or muons).
Calculated total cross sections for WW, WZ, and ZZ channels.
Measured WW production cross section: 37.0 pb with uncertainties.
Measured WZ production cross section: 6.4 pb with uncertainties.
Measured ZZ production cross section: 5.3 pb with uncertainties.
All measurements align well with theoretical predictions at high accuracy.

Abstract

The first measurements of diboson production cross sections in proton-proton interactions at a center-of-mass energy of 5. 02 TeV are reported. They are based on data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 302 pb^-1. Events with two, three, or four charged light leptons (electrons or muons) in the final state are analyzed. The WW, WZ, and ZZ total cross sections are measured as ��ₖₖ=37. 0-₅. ₂^+5. 5 (stat) -₂. ₆^+2. 7 (syst) pb, ��ₖₙ=6. 4-₂. ₁^+2. 5 (stat) -₀. ₃^+0. 5 (syst) pb, and ��ₙₙ=5. 3-₂. ₁^+2. 5 (stat) -₀. ₄^+0. 5 (syst) pb. All measurements are in good agreement with theoretical calculations at combined next-to-next-to-leading order quantum chromodynamics and next-to-leading order electroweak accuracy.

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