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

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${}^{\mathrm{\prime }}$ boson couplings to a bb quark pair ($g_{\mathrm{b}}$), an sb quark pair ($g_{\mathrm{b}}{\delta }_{\mathrm{b}\mathrm{s}}$), and any same-flavor charged lepton ($g_{\mathrm{\ell }}$) or neutrino pair ($g_{\nu }$), with $\mid g_{\nu }\mid =\mid g_{\mathrm{\ell }}\mid$. For a Z${}^{\mathrm{\prime }}$ boson with a mass $m_{{\mathrm{Z}}^{\mathrm{\prime }}}$ = 350 GeV (2 TeV) and $\mid {\delta }_{\mathrm{b}\mathrm{s}}\mid$ $<$ 0.25, the majority of the parameter space with 0.0057 $<$ $\mid g_{\mathrm{\ell }}\mid$ $<$ 0.35 (0.25 $<$ $\mid g_{\mathrm{\ell }}\mid$ $<$ 0.43) and 0.0079 $<$ $\mid g_{\mathrm{b}}\mid$ $<$ 0.46 (0.34 $<$ $\mid g_{\mathrm{b}}\mid$ $<$ 0.57) is excluded at 95% confidence level. Finally, constraints are set on a Z${}^{\mathrm{\prime }}$ model with parameters consistent with low-energy b $\to$ s$\mathrm{\ell }\mathrm{\ell }$ measurements. In this scenario, most of the allowed parameter space is excluded for a Z${}^{\mathrm{\prime }}$ boson with 350 $<m_{{\mathrm{Z}}^{\mathrm{\prime }}}$ $<$ 500 GeV, while the constraints are less stringent for higher $m_{{\mathrm{Z}}^{\mathrm{\prime }}}$ 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.