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Observation of the Anomalous Shape of X(1840) in J/ψ→γ3(π+π−) Indicating a Second Resonance Near pp¯ Threshold

17Citations signalées — pas une note de qualité
87Institutions déclarées
17Pays d’affiliation déclarés

Résumé fourni par la source

Using a sample of (10087±44)×10^{6} J/ψ events, which is about 45 times larger than that was previously analyzed, a further investigation on the J/ψ→γ3(π^{+}π^{-}) decay is performed. A significant distortion at 1.84 GeV/c^{2} in the line shape of the 3(π^{+}π^{-}) invariant mass spectrum is observed for the first time, which could be resolved by two overlapping resonant structures, X(1840) and X(1880). The new state X(1880) is observed with a statistical significance larger than 10σ. The mass and width of X(1880) are determined to be 1882.1±1.7±0.7 MeV/c^{2} and 30.7±5.5±2.4 MeV, respectively, which indicates the existence of a pp[over ¯] bound state.

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Contrôle bibliographique ouvert

DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.

Titre Crossref
Observation of the Anomalous Shape of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>X</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1840</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>γ</mml:mi><mml:mn>3</mml:mn><mml:mo stretchy="false">(</mml:mo><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> Indicating a Second Resonance Near <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo accent="true" stretchy="false">¯</mml:mo></mml:mover></mml:m
Date Crossref
09/04/2024
Éditeur
American Physical Society (APS)
Type
journal-article

Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude et ne compte pas comme une seconde source scientifique indépendante.

Institutions déclarées

Institute of High Energy PhysicsSiberian Branch of the Russian Academy of SciencesBudker Institute of Nuclear PhysicsUppsala UniversityZhengzhou UniversityJohannes Gutenberg University MainzUniversity of TurinLiaoning Normal UniversityUniversity of Science and Technology of ChinaSoutheast UniversityJoint Institute for Nuclear ResearchIstituto Nazionale di Fisica Nucleare, Sezione di FerraraPeking UniversityNational Centre for Nuclear ResearchInstitute of Physics and TechnologyIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiCarnegie Mellon UniversityUniversity of MünsterWuhan UniversityUniversity of Chinese Academy of SciencesIstinye UniversityXinyang Normal UniversityNankai UniversitySoochow UniversityNorth China Electric Power UniversityNanjing UniversityTsinghua UniversityInstitute of Modern PhysicsJilin UniversityHunan UniversityChung-Ang UniversityRuhr University BochumShandong UniversityYunnan UniversityHelmholtz Institute MainzUniversity of JinanLiaoning UniversityUniversità degli Studi del Piemonte Orientale “Amedeo Avogadro”Sun Yat-sen UniversityUniversity of OxfordUniversity of FerraraUniversity of ManchesterGSI Helmholtz Centre for Heavy Ion ResearchGuangxi UniversityHenan University of TechnologyNanjing Normal UniversityShandong Normal UniversityFudan UniversityHenan Normal UniversityUniversity of Hawaiʻi at MānoaUniversity of Hawaii SystemSuranaree University of TechnologySouth China Normal UniversityUniversity of the PunjabIndiana University BloomingtonHangzhou Normal UniversityHuangshan UniversityUniversity of TarapacáUniversity of GroningenChina University of GeosciencesJustus-Liebig-Universität GießenIndian Institute of Technology MadrasQufu Normal UniversityBeijing Institute of Petrochemical TechnologyLanzhou UniversitySichuan UniversityGuangxi Normal UniversityShanxi UniversityCentral China Normal UniversityHenan University of Science and TechnologyUniversity of South ChinaCentral South UniversityZhejiang UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaCOMSATS University IslamabadUniversity of PerugiaHunan Normal UniversityShanxi Normal UniversityNear East UniversityHebei UniversityUniversity of Science and Technology LiaoningInner Mongolia UniversityYantai UniversityShanghai Jiao Tong UniversityChina Center of Advanced Science and TechnologyBeihang UniversityHenan University

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