PoS - Proceedings of Science
Volume 398 - The European Physical Society Conference on High Energy Physics (EPS-HEP2021) - T07: Top and Electroweak Physics
Search for vector boson scattering with the semi-leptonic WV signature at CMS
D. Valsecchi
Full text: Not available
Abstract
A search for the electroweak VBS production of a WV pair plus two jets, in the semi-leptonic
channel, at a center-of-mass energy of 13 TeV is reported. The data sample corresponds to the full Run-II CMS
dataset of proton-proton collisions at 13 TeV including an integrated luminosity of 137.1 fb$^{-1}$. Events
are analyzed in two energy regimes: either the hadronically decaying W/Z boson is reconstructed as one
large-radius jet, or it is identified as a pair of jets with dijet mass near the W/Z mass. Machine learning
models are optimized for the signal extraction and the classifiers are interpreted using tools from the
explainable machine learning field. The overwhelming background contribution from the single W production
plus jets is measured in dedicated control regions implementing a data-driven strategy.
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