Measurements of production cross sections of polarized same-sign W boson pairs in association with two jets in proton-proton collisions at √{ s } = 13 TeV
Abstract
The first measurements of production cross sections of polarized same-sign W±W± boson pairs in proton-proton collisions are reported. The measurements are based on a data sample collected with the CMS detector at the LHC at a center-of-mass energy of 13TeV, corresponding to an integrated luminosity of 137fb-1 . Events are selected by requiring exactly two same-sign leptons, electrons or muons, moderate missing transverse momentum, and two jets with a large rapidity separation and a large dijet mass to enhance the contribution of same-sign W±W± scattering events. An observed (expected) 95% confidence level upper limit of 1.17 (0.88) fbis set on the production cross section for longitudinally polarized same-sign W±W± boson pairs. The electroweak production of same-sign W±W± boson pairs with at least one of the W bosons longitudinally polarized is measured with an observed (expected) significance of 2.3 (3.1) standard deviations.
- Publication:
-
Physics Letters B
- Pub Date:
- January 2021
- DOI:
- 10.1016/j.physletb.2020.136018
- Bibcode:
- 2021PhLB..81236018S
- Keywords:
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- CMS;
- Diboson;
- Electroweak;
- Polarized;
- Longitudinal