Search for b hadron decays to long-lived particles in the CMS endcap muon detectors

Abstract

A search for long-lived particles originating from the decay of b hadrons produced in proton-proton collisions with a center-of-mass energy of 13 TeV at the LHC is presented. The analysis is performed on a data set recorded in 2018, corresponding to an integrated luminosity of 41.6 fb${}^{-1}$. Interactions of the long-lived particles in the CMS endcap muon system would create hadronic or electromagnetic showers, producing clusters of detector hits. Selected events contain at least one such high-multiplicity cluster in the muon endcaps and require the presence of a displaced muon. The most stringent upper limits to date on the branching fraction $\mathcal{B}$(B $\to$ K$\Phi$), where the long-lived particle $\Phi$ decays to a pair of hadrons, are obtained for $\Phi$ masses of 0.3$-$3.0 GeV and $\Phi$ mean proper decay lengths in the range of 1$-$500 cm.

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-24-004 (CMS Public Pages)

References in corpus (57)

• 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
• Confidence Level Computation for Combining Searches with Small Statistics
• Parton distributions from high-precision collider data
• Theories with Gauge-Mediated Supersymmetry Breaking
• R-parity violating supersymmetry
• Particle-flow reconstruction and global event description with the CMS detector
• Echoes of a Hidden Valley at Hadron Colliders
• The CMS trigger system
• Description and performance of track and primary-vertex reconstruction with the CMS tracker
• The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
• Asymmetric Dark Matter
• Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
• Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Extraction and validation of a new set of CMS PYTHIA8 tunes from underlying-event measurements
• Mini-Split
• Performance of the CMS Level-1 trigger in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Measurement of the Inclusive W and Z Production Cross Sections in pp Collisions at sqrt(s) = 7 TeV
• Non-Abelian Dark Sectors and Their Collider Signatures
• Discovering the Higgs Through Highly-Displaced Vertices
• Electron and photon reconstruction and identification with the CMS experiment at the CERN LHC
• Performance of missing transverse momentum reconstruction in proton-proton collisions at $\sqrt{s}=$ 13 TeV using the CMS detector
• Folded Supersymmetry and the LEP Paradox
• Light inflaton Hunter's Guide
• Decay and Detection of a Light Scalar Boson Mixing with the Higgs
• Dynamical Dark Matter: I. Theoretical Overview
• Missing transverse energy performance of the CMS detector
• Stealth Supersymmetry
• Pileup mitigation at CMS in 13 TeV data
• Heavy neutrino searches at the LHC with displaced vertices
• Search for hidden-sector bosons in $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decays
• A Quirky Little Higgs Model
• Search for long-lived scalar particles in $B^{+}\to K^{+}\chi ({\mu }^{+}{\mu }^{-})$ decays
• The CMS statistical analysis and combination tool: COMBINE
• BBN for the LHC: constraints on lifetimes of the Higgs portal scalars
• A Stealth Supersymmetry Sampler
• Expression of Interest for the CODEX-b Detector
• Probing Baryogenesis with Displaced Vertices at the LHC
• Shedding Light on Neutrino Masses with Dark Forces
• A Quirky Probe of Neutral Naturalness
• Dynamical R-Parity Violation
• ABCDisCo: Automating the ABCD Method with Machine Learning
• Distinguishing Dynamical Dark Matter at the LHC
• LHC Signatures of a Minimal Supersymmetric Hidden Valley
• Search for Long-Lived Particles in $e^{+}{e}^{-}$ Collisions
• Performance of the CMS Cathode Strip Chambers with Cosmic Rays
• Performance of the CMS high-level trigger during LHC Run 2
• Performance of the CMS muon trigger system in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for long-lived particles decaying in the CMS endcap muon detectors in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for a Low Mass Particle Decaying into mu^+ mu^- in B0-> K*0 X and B0-> rho0 X at Belle
• Enriching the physics program of the CMS experiment via data scouting and data parking
• Search for long-lived heavy neutral leptons decaying in the CMS muon detectors in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Energetic long-lived particles in the CMS muon chambers
• Search for long-lived particles decaying in the CMS muon detectors in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Search for long-lived heavy neutrinos in the decays of B mesons produced in proton-proton collisions at $\sqrt{s}$ = 13 TeV