Observation of the J/ψ → μ+μ−μ+μ− decay in proton-proton collisions at s√ = 13 TeV

(CMS Collaboration) Hayrapetyan, Aram; ... ; Giljanović, Duje; Godinović, Nikola; Lelas, Damir; Šćulac, Ana; Kovač, Marko; Petković, Andro; Šćulac, Toni; Bargassa, Pedrame; Brigljević, Vuko; Chitroda, Bhakti Kanula; Ferenček, Dinko; Jakovčić, Krešimir; Mishra, Saswat; Starodumov, Andrey; Šuša, Tatjana; ... ; Roguljić, Matej; ... ; Zhokin, Alexander (2024) Observation of the J/ψ → μ+μ−μ+μ− decay in proton-proton collisions at s√ = 13 TeV. Physical Review D, 109 (11). ISSN 2470-0010

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Abstract

The J/ψ → μ+μ−μ+μ− decay has been observed with a statistical significance in excess of five standard deviations. The analysis is based on an event sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of 33.6 fb−1. Normalizing to the J/ψ → μ+μ− decay mode leads to a branching fraction [10.1 +3.3−2.7 (stat) ± 0.4 (syst)] × 10−7, a value that is consistent with the standard model prediction.

Item Type:	Article
Uncontrolled Keywords:	High energy physics; Experimental particle physics; LHC ; CMS; p p: scattering; p p: colliding beams; J/psi(3100): leptonic decay; decay modes; muon: multiple production; J/psi(3100): branching ratio; branching ratio: measured; statistical analysis; CERN LHC Coll; data analysis method; experimental results; J/psi(3100) --> 2muon+ 2muon-; 13000 GeV-cms
Subjects:	NATURAL SCIENCES NATURAL SCIENCES > Physics NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields
Divisions:	Division of Experimental Physics Centre for detectors, sensors and electronics
Depositing User:	Virna Brumnić
Date Deposited:	09 Oct 2024 06:27
URI:	http://fulir.irb.hr/id/eprint/9143
DOI:	10.1103/PhysRevD.109.L111101

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