Search for a new neutral gauge boson produced in association with one or two b jets and decaying into a pair of muons in proton-proton collisions at √(s) = 13 TeV

2025/11/14 by CMS Collaboration · 2 voices
#hep-ex

paper · pdf · doi:10.48550/arxiv.2511.11853

Abstract

A search for a new neutral gauge boson, Z', produced in association with one or two jets, including at least one b jet, and decaying into a pair of muons is presented. The analysis uses proton-proton collision data collected with the CMS detector at √(s) = 13 TeV, corresponding to an integrated luminosity of 138 fb^-1. No significant deviation from background expectations is observed. Upper limits at 95% confidence level on the product of cross section, branching fraction to dimuons, acceptance, and efficiency, from 0.2 to 2 fb, are set for Z' boson masses between 125 and 350 GeV. Process-dependent products of acceptance and efficiency, and model-independent limits on the signal yield are provided. These are the only results to date in the 125-200 GeV mass range and the most stringent for b quark fusion production modes in the 200-350 GeV range, complementing inclusive Z' boson searches.

Citations

• LHC di-lepton searches for Z^′ bosons which explain measurements of b → s l⁺l^- transitions
• Evidence for an Excess of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mover accent="true"><mml:mi>B</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mo>→</mml:mo><mml:msup><mml:mi>D</mml:mi><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>*</mml:mo><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mi>τ</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msub><mml:mover accent="true"><mml:mi>ν</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mi>τ</mml:mi></mml:msub></mml:math>Decays
• The RooStats Project
• The RooFit toolkit for data modeling

Discussions

• Are there extra Z-boson like undiscovered particles made at higher mass? Or did we miss them because they can only see them when they're made together with quarks? This #CMSPaper scans the dimuon spec [bsky, 6 points, 0 comments]
• #CMSpaper: Search for a new neutral gauge boson produced in association with one or two b jets and decaying into a pair of muons in proton-proton collisions at √s = 13 TeV (arXiv:2511.11853) https://a [bsky, 1 points, 0 comments]

Related

• Search for a neutral gauge boson with nonuniversal fermion couplings in vector boson fusion processes in proton-proton collisions at √(s) = 13 TeV
• Search for heavy neutral resonances decaying to tau lepton pairs in proton-proton collisions at √(s) = 13 TeV
• Search for bosons of an extended Higgs sector in b quark final states in proton-proton collisions at √(s) = 13 TeV
• Measurement of Zγ production in proton-proton collisions at √(s) = 13.6 TeV and constraints on neutral triple gauge couplings
• Search for heavy neutral Higgs bosons A and H in the \mathrmttZ channel in proton-proton collisions at 13 TeV