Observation of the Rare Decay of the Η Meson To Four Muons
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Date
2023
Authors
Gürpınar Güler, Emine
Güler, Yalçın
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Open Access Color
HYBRID
Green Open Access
Yes
OpenAIRE Downloads
15
OpenAIRE Views
27
Publicly Funded
Yes
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Average
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Average
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Top 10%
Abstract
A search for the rare Formula Presented double-Dalitz decay is performed using a sample of proton-proton collisions, collected by the CMS experiment at the CERN LHC with high-rate muon triggers during 2017 and 2018 and corresponding to an integrated luminosity of Formula Presented. A signal having a statistical significance well in excess of 5 standard deviations is observed. Using the Formula Presented decay as normalization, the branching fraction Formula Presented is measured, where the last term is the uncertainty in the normalization channel branching fraction. This work achieves an improved precision of over 5 orders of magnitude compared to previous results, leading to the first measurement of this branching fraction, which is found to agree with theoretical predictions. © 2023 CERN, for the CMS Collaboration.
Description
Keywords
Branching fractions, High rate, Integrated luminosity, Muon trigger, Normalisation, Proton proton collisions, Rare decays, Standard deviation, Statistical significance, η Mesons, Charged particles, article, meson, prediction, rare decay, p p: scattering, CMS experiment, CERN Lab, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 13000 GeV-cms, p p, scattering, FOS: Physical sciences, eta: leptonic decay, Particles & fields, meson, final state: (lepton), 530, eta: rare decay, PARTICLE PHYSICS; LARGE HADRON COLLIDER; CMS, High Energy Physics - Experiment, eta --> 2muon+ 2muon-, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], muon, trigger, High energy physics, info:eu-repo/classification/ddc/530, Hadron colliders, Branching fractions; High rate; Integrated luminosity; Muon trigger; Normalisation; Proton proton collisions; Rare decays; Standard deviation; Statistical significance; η Mesons;, eta: branching ratio: measured, Mesons, hep-ex, CMS, Physics, ddc:530, 500, muon: trigger, LARGE HADRON COLLIDER, CMS,LHC,Rare Decays, error: statistical, CERN LHC Coll, Physics and Astronomy, eta --> 2muon+ 2muon-, PARTICLE PHYSICS, LHC, branching ratio, Particle decays, Experimental particle physics, statistical, p p: colliding beams, LHC, rare decay, eta meson, collider; CMS; eta meson, experimental results
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Fields of Science
Citation
WoS Q
Q1
Scopus Q
Q1
OpenCitations Citation Count
6
Source
Physical Review Letters
Volume
131
Issue
9
Start Page
End Page
PlumX Metrics
Citations
CrossRef : 2
Captures
Mendeley Readers : 9
SCOPUS™ Citations
15
checked on Feb 03, 2026
Web of Science™ Citations
6
checked on Feb 03, 2026
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