Search for a high-mass dimuon resonance produced in association with b quark jets at $\sqrt{s}$ = 13 TeV

Abstract

A search for high-mass dimuon resonance production in association with one or more b quark jets is presented. The study uses proton-proton collision data collected with the CMS detector at the LHC corresponding to an integrated luminosity of 138 fb${}^{-1}$ at a center-of-mass energy of 13 TeV. Model-independent limits are derived on the number of signal events with exactly one or more than one b quark jet. Results are also interpreted in a lepton-flavor-universal model with Z${}^{\prime }$ boson couplings to a bb quark pair ($g_{\mathrm{b}}$), an sb quark pair ($g_{\mathrm{b}}{\delta }_{\mathrm{bs}}$), and any same-flavor charged lepton ($g_{\ell }$) or neutrino pair ($g_{\nu }$), with $\left|g_{\nu }\right|=\left|g_{\ell }\right|$. For a Z${}^{\prime }$ boson with a mass $m_{{\mathrm{Z}}^{\prime }}$ = 350 GeV (2 TeV) and $\left|{\delta }_{\mathrm{bs}}\right|$ $<$ 0.25, the majority of the parameter space with 0.0057 $<$ $\left|g_{\ell }\right|$ $<$ 0.35 (0.25 $<$ $\left|g_{\ell }\right|$ $<$ 0.43) and 0.0079 $<$ $\left|g_{\mathrm{b}}\right|$ $<$ 0.46 (0.34 $<$ $\left|g_{\mathrm{b}}\right|$ $<$ 0.57) is excluded at 95% confidence level. Finally, constraints are set on a Z${}^{\prime }$ model with parameters consistent with low-energy b $\to$ s$\ell \ell$ measurements. In this scenario, most of the allowed parameter space is excluded for a Z${}^{\prime }$ boson with 350 $<m_{{\mathrm{Z}}^{\prime }}$ $<$ 500 GeV, while the constraints are less stringent for higher $m_{{\mathrm{Z}}^{\prime }}$ hypotheses. This is the first dedicated search at the LHC for a high-mass dimuon resonance produced in association with multiple b quark jets, and the constraints obtained on models with this signature are the most stringent to date.

arXiv commentReplaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/EXO-22-016 (CMS Public Pages)

References in corpus (21)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• FastJet user manual
• Asymptotic formulae for likelihood-based tests of new physics
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Confidence Level Computation for Combining Searches with Small Statistics
• Parton distributions from high-precision collider data
• The Physics of Heavy Z' Gauge Bosons
• Merging meets matching in MC@NLO
• NLO single-top production matched with shower in POWHEG: s- and t-channel contributions
• The Phenomenology of Extra Neutral Gauge Bosons
• Pileup Per Particle Identification
• W+W-, WZ and ZZ production in the POWHEG BOX
• Jet Flavour Classification Using DeepJet
• W+W-, WZ and ZZ production in the POWHEG BOX V2
• Long-distance effects in $B\to K^{\ast }\ell \ell$ from Analyticity
• Flavoured $B-L$ Local Symmetry and Anomalous Rare $B$ Decays
• Handling uncertainties in background shapes: the discrete profiling method
• $U(1{)}_{B_3-3L_{\mu }}$ gauge symmetry as a simple description of $b\to s$ anomalies
• The Rumble in the Meson: a leptoquark versus a $Z^{\prime }$ to fit $b\to s{\mu }^{+}{\mu }^{-}$ anomalies including 2022 LHCb $R_{K^{(\ast )}}$ measurements

Cited by in corpus (1)

• Weakly supervised anomaly detection with event-level variables