PoS - Proceedings of Science
Volume 390 - 40th International Conference on High Energy physics (ICHEP2020) - Parallel: Top Quark and Electroweak Physics
W boson measurements with the CMS experiment
R. Salvatico* on behalf of the CMS collaboration
*corresponding author
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Pre-published on: January 20, 2021
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The W boson, one of the two mediators of the weak interaction, has been broadly studied at both $\mathrm{e^+e^-}$ and hadron colliders since its discovery. Despite the increasing accuracy in the measurement of its properties, it still remains relatively poorly known if compared to the other mediator, the Z boson, due to the bigger experimental challenges in the reconstruction of the W boson decays. The CMS experiment at the CERN LHC covers a vast program in the electroweak physics sector, with numerous analyses aiming at measuring the W boson properties with high precision. Some of the latest results from the CMS Collaboration are presented in this report. These include measurements of the multi-differential W boson production cross sections, polarization and charge asymmetry, the first search for the rare decay of the W boson into a pion and a photon at the LHC, and the first evidence for WW production via double-parton scattering. Such measurements exploit, either partially or fully, the integrated luminosity collected by CMS during the LHC Run 2 (2016--2018), and allow us to further increase our knowledge of this fundamental piece of the standard model of particle physics.
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