Observation of an excess of dicharmonium events in the four-muon final state with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00579073" target="_blank" >RIV/68378271:_____/23:00579073 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/23:00373806 RIV/68407700:21340/23:00373806 RIV/68407700:21670/23:00373806 RIV/00216208:11320/23:10476585 RIV/61989592:15310/23:73623094

Výsledek na webu

<a href="https://hdl.handle.net/11104/0347972" target="_blank" >https://hdl.handle.net/11104/0347972</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.131.151902" target="_blank" >10.1103/PhysRevLett.131.151902</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Observation of an excess of dicharmonium events in the four-muon final state with the ATLAS detector

Popis výsledku v původním jazyce

A search is made for potential ccc¯c¯ tetraquarks decaying into a pair of charmonium states in the four muon final state using proton-proton collision data at s=13  TeV, corresponding to an integrated luminosity of 140  fb-1 recorded by the ATLAS experiment at LHC. Two decay channels, J/ψ+J/ψ→4μ and J/ψ+ψ(2S)→4μ, are studied. Backgrounds are estimated based on a hybrid approach involving Monte Carlo simulations and data-driven methods. Statistically significant excesses with respect to backgrounds dominated by the single parton scattering are seen in the di-J/ψ channel consistent with a narrow resonance at 6.9 GeV and a broader structure at lower mass. A statistically significant excess is also seen in the J/ψ+ψ(2S) channel. The fitted masses and decay widths of the structures are reported.

Název v anglickém jazyce

Observation of an excess of dicharmonium events in the four-muon final state with the ATLAS detector

Popis výsledku anglicky

A search is made for potential ccc¯c¯ tetraquarks decaying into a pair of charmonium states in the four muon final state using proton-proton collision data at s=13  TeV, corresponding to an integrated luminosity of 140  fb-1 recorded by the ATLAS experiment at LHC. Two decay channels, J/ψ+J/ψ→4μ and J/ψ+ψ(2S)→4μ, are studied. Backgrounds are estimated based on a hybrid approach involving Monte Carlo simulations and data-driven methods. Statistically significant excesses with respect to backgrounds dominated by the single parton scattering are seen in the di-J/ψ channel consistent with a narrow resonance at 6.9 GeV and a broader structure at lower mass. A statistically significant excess is also seen in the J/ψ+ψ(2S) channel. The fitted masses and decay widths of the structures are reported.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review Letters

ISSN

0031-9007

e-ISSN

1079-7114

Svazek periodika

131

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

22

Strana od-do

151902

Kód UT WoS článku

001102901700001

EID výsledku v databázi Scopus

2-s2.0-85175279527