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Accès ouvert déclaré 2026 article

Improved measurement of η ′ → e + e − ω

0Citations signalées — pas une note de qualité
88Institutions déclarées
15Pays d’affiliation déclarés

Résumé fourni par la source

Using a sample of ( 10087 ± 44 ) × 10 6 J / ψ events collected with the BESIII detector, an improved measurement of the decay η ′ → e + e − ω , with ω → π + π − π 0 and π 0 → γ γ is performed. The branching fraction is determined to be B ( η ′ → e + e − ω ) = ( 1.79 ± 0.09 ± 0.12 ) × 10 − 4 , where the first uncertainty is statistical and the second is systematic. This result is consistent with the previous measurement and is obtained with significantly improved precision. Furthermore, the first measurement of the transition form factor cutoff parameter for this decay is reported, with Λ − 1 = ( 2.92 ± 0.83 ± 0.15 ) GeV − 1 . These measurements provide valuable input for understanding the internal structure of the η ′ meson and testing theoretical models.

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Contrôle bibliographique ouvert

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

Titre Crossref
Improved measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mi>η</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>′</mml:mo> </mml:mrow> </mml:msup> <mml:mo stretchy="false">→</mml:mo> <mml:msup> <mml:mrow> <mml:mi>e</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> </mml:mrow> </mml:msup> <mml:msup> <mml:mrow> <mml:mi>e</mml:mi> </mml:mrow>
Date Crossref
23/07/2026
Éditeur
American Physical Society (APS)
Type
journal-article

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Institutions déclarées

Budker Institute of Nuclear PhysicsUppsala UniversityZhengzhou UniversityUniversity of FerraraIstituto Nazionale di Fisica Nucleare, Sezione di FerraraJohannes Gutenberg University MainzUniversity of TurinUniversity of Science and Technology of ChinaJoint Institute for Nuclear ResearchUniversity of Chinese Academy of SciencesNorth China Electric Power UniversityNational Centre for Nuclear ResearchMongolian Academy of SciencesIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiCarnegie Mellon UniversityUniversity of MünsterWuhan UniversityLanzhou UniversityIstinye UniversityPeking UniversityNankai UniversityChina University of GeosciencesHenan Normal UniversityNanjing UniversityTsinghua UniversityFudan UniversityInstitute of Modern PhysicsGuangxi University of Science and TechnologyChung-Ang UniversityUniversity of BristolYunnan UniversityHelmholtz Institute MainzRuhr University BochumUniversity of South ChinaLiaoning UniversityInner Mongolia UniversityJilin UniversityJilin Medical UniversityUniversità degli Studi del Piemonte Orientale “Amedeo Avogadro”Piedmont UniversityUniversity of ManchesterUniversity of OxfordGSI Helmholtz Centre for Heavy Ion ResearchShandong University of TechnologyShandong UniversityNanjing Normal UniversityShandong Normal UniversityIndiana UniversityUniversity of Hawaii SystemHangzhou Normal UniversitySuranaree University of TechnologySouth China Normal UniversityUniversity of the PunjabHuangshan UniversityUniversity of JinanUniversity of TarapacáJustus-Liebig-Universität GießenHenan UniversityQufu Normal UniversityHunan Normal UniversityRenmin University of ChinaHebei UniversityHunan UniversityChina Center of Advanced Science and TechnologyXi'an Jiaotong UniversitySichuan UniversityGuangxi Normal UniversityCentral China Normal UniversityShanxi University of Traditional Chinese MedicineGuangxi UniversityHenan University of Science and TechnologyLiaoning Normal UniversityHenan University of TechnologyCentral South UniversityZhejiang UniversityUniversity of PerugiaIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaUniversity of La SerenaChengdu University of TechnologyShanghai Jiao Tong UniversityNear East UniversityYantai UniversitySouthwest University of Science and TechnologyBeihang UniversityHengyang Normal UniversityShanxi Normal UniversityLongyan UniversityUniversity of Science and Technology Liaoning

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Sujets associés

Quantum Chromodynamics and Particle InteractionsParticle physics theoretical and experimental studiesNeutrino Physics Research

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