Search for anomalous couplings in WW and WZ production with single-lepton final states at 13 TeV

CMS Physics Analysis Summaries
Report number	CMS-PAS-SMP-25-001
Title	Search for anomalous couplings in WW and WZ production with single-lepton final states at 13 TeV
Corporate author(s)	CMS Collaboration
Collaboration	CMS Collaboration
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	A search for deviations from the standard model in a generic manner using an effective field theory (EFT) approach is carried out using the proton-proton collision dataset recorded by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of $138~\mathrm{fb}^{-1}$. In this study we constrain Wilson coefficients (WCs) corresponding to dimension six EFT operators that would lead to anomalous gauge boson self and vector boson to quark couplings. We consider diboson (WW and WZ) production processes with one W boson decaying to (anti-)lepton plus anti-neutrino (neutrino) and the second W or Z boson decaying hadronically. Since the contribution from anomalous couplings is expected to be most visible at high energy scales, we focus on final states where the hadronic decays from the W and Z bosons merge into a single large-radius jet. A dedicated machine-learning based classifier is employed to separate such jets from vector boson decays to those from background processes. We report the most stringent constraints to date on the WCs of operators corresponding to anomalous triple gauge boson couplings. The bounds set on vector bosons' to quark couplings are competitive to those from previous inclusive jet measurements.
Email contact: cms-pag-conveners-smp@cern.ch Fulltext in PDF Figure_010-d Figure_010-a Figure_010-c Figure_010-b Figure_005-d Figure_002-b Figure_002-c Figure_004-f Figure_004-d Figure_004-e Figure_004-b Figure_004-c Figure_004-a Figure_005-c Figure_005-b Figure_005-a Figure_007-a Figure_007-c Figure_007-b Figure_002-a Figure_009 Figure_008 Figure_006 Figure_003 Figure_001 Additional information for the analysis (restricted access)