Search for resonant new phenomena in high-mass dilepton final states at $\sqrt{s}=13.6~\mathrm{TeV}$

CMS Physics Analysis Summaries
Report number	CMS-PAS-EXO-25-021
Title	Search for resonant new phenomena in high-mass dilepton final states at $\sqrt{s}=13.6~\mathrm{TeV}$
Corporate author(s)	CMS Collaboration
Collaboration	CMS Collaboration
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	A search for heavy new resonances decaying into pairs of electrons or muons is presented. The search uses proton-proton collision data at a centre-of-mass energy of $\sqrt{s}=13.6~\mathrm{TeV}$, collected by the CMS experiment at the LHC during 2022-2025 and corresponding to an integrated luminosity of $283~\mathrm{fb}^{-1}$. A model-independent search for heavy resonances is conducted covering a wide mass range spanning from $200~\mathrm{GeV}$ to $6~\mathrm{TeV}$. No significant deviation is observed with respect to the Standard Model expectation. Upper limits are presented on the ratio of the product of the production cross section and the branching fraction to dileptons of a new narrow resonance to that of the Z boson. These provide the most stringent lower limits to date on the mass for various spin-1 particles and spin-2 gravitons in the Randall-Sundrum model. In particular, lower mass limits of 5.55 (4.95) TeV are set on $\text{Z'}_\mathrm{SSM}$ ($\text{Z'}_\psi$) bosons at $95\%$ confidence level.
Email contact: cms-pag-conveners-exotica@cern.ch Fulltext in PDF Figure_003-a Figure_003-c Figure_003-b Figure_004-a Figure_004-b Figure_002-a Figure_002-b Figure_002-c Figure_005-c Figure_005-b Figure_005-a Figure_001-b Figure_001-a Figure_004-c Additional information for the analysis (restricted access)