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Accès ouvert déclaré 2025 article

Observation of transverse polarization and determination of psionic form factors of the Λ hyperon at s = 3.773 GeV

1Citations signalées, ce qui n’est pas une note de qualité
83Institutions déclarées
16Pays d’affiliation déclarés

Rattachement africain : ru, se, cn, de, it, pl, mn, us, kr, gb, th, pk, cl, nl, in, cy. Niveau de preuve : code pays fourni par la source.

Le résumé fourni par la source

Using a data sample of e + e − collision data corresponding to an integrated luminosity of 20.3 fb − 1 collected by the BESIII detector at the BEPCII collider, we present an observation of transverse polarization and a complete determination of the psionic form factors of the Λ hyperon in e + e − → Λ Λ ¯ decay with the entangled Λ − Λ ¯ pair at s = 3.773 GeV . The relative phase between the psionic form factors is determined to be Δ Φ = ( 1.53 ± 0.36 ± 0.03 ) rad with a significance of 5.5 σ taking into account systematic uncertainty. This result indicates a nonzero phase between the transition amplitudes of the Λ Λ ¯ helicity states. Additionally, we measure the angular distribution parameter and the modulus of the ratio between the psionic form factors to be η = 0.86 ± 0.05 ± 0.03 and R ( s ) = | G E ( s ) / G M ( s ) | = 0.47 ± 0.08 ± 0.05 , where the first uncertainty is statistical and the second systematic.

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Le contrôle bibliographique ouvert

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

Titre Crossref
Observation of transverse polarization and determination of psionic form factors of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi mathvariant="normal">Λ</mml:mi> </mml:math> hyperon at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msqrt> <mml:mrow> <mml:mi>s</mml:mi> </mml:mrow> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>3.773</mml:mn> <mml:mtext> </mml:mtext> <mml:mtext> </mml:mtext> <mml:mi>GeV</mml:mi> </mml:mrow> </mml:math>
Date Crossref
24/09/2025
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 il ne compte pas comme une seconde source scientifique indépendante.

Les institutions déclarées

Budker Institute of Nuclear PhysicsUppsala UniversityZhengzhou UniversityJohannes Gutenberg University MainzUniversity of TurinUniversity of Science and Technology of ChinaJoint Institute for Nuclear ResearchPeking UniversityUniversity of Chinese Academy of SciencesNational Centre for Nuclear ResearchMongolian Academy of SciencesIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIstituto Nazionale di Fisica Nucleare, Sezione di FerraraCarnegie Mellon UniversityUniversity of MünsterWuhan UniversityLanzhou UniversityNankai UniversityChina University of GeosciencesHenan UniversityNorth China Electric Power UniversityNanjing UniversityTsinghua UniversityFudan UniversityInstitute of Modern PhysicsGuangxi University of Science and TechnologyJilin UniversityJilin Medical UniversityHunan UniversityHunan Normal UniversityChung-Ang UniversityUniversity of BristolShandong UniversityYunnan UniversityHelmholtz Institute MainzRuhr University BochumUniversity of South ChinaUniversity of JinanLiaoning UniversityInner Mongolia UniversityHenan Normal UniversityUniversità degli Studi del Piemonte Orientale “Amedeo Avogadro”Piedmont UniversityNanjing Normal UniversityUniversity of FerraraUniversity of ManchesterUniversity of OxfordGSI Helmholtz Centre for Heavy Ion ResearchGuangxi UniversityShandong Normal UniversityIndiana UniversityUniversity of Hawaii SystemSuranaree University of TechnologySouth China Normal UniversityUniversity of the PunjabHangzhou Normal UniversityHuangshan UniversityUniversity of TarapacáUniversity of GroningenIndian Institute of Technology MadrasJustus-Liebig-Universität GießenLiaoning Normal UniversityQufu Normal UniversityRenmin University of ChinaHebei UniversityChina Center of Advanced Science and TechnologySichuan UniversityGuangxi Normal UniversityCentral China Normal UniversityShanxi University of Traditional Chinese MedicineHenan University of Science and TechnologyHenan University of TechnologyCentral South UniversityZhejiang UniversityCOMSATS University IslamabadUniversity of PerugiaIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaShanghai Jiao Tong UniversityNear East UniversityBeihang UniversityYantai UniversityShanxi Normal UniversityUniversity of Science and Technology Liaoning

Une affiliation ne permet pas de déduire la nationalité d’un auteur.

Les sujets associés

Particle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research

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