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First observation of Λc+→ΛK+π0 and evidence of Λc+→ΛK+π+π−

6Citations signalées, ce qui n’est pas une note de qualité
87Institutions déclarées
17Pays d’affiliation déclarés

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

Le résumé fourni par la source

We present the first observation of the singly Cabibbo-suppressed decay Λc+→ΛK+π0 with a significance of 5.7σ and the first evidence of Λc+→ΛK+π+π− decay with a significance of 3.1σ , based on e+e− annihilation data recorded by the BESIII detector at the BEPCII collider. The data correspond to an integrated luminosity of 6.4 fb−1 , in the center-of-mass energy range from 4.600 to 4.950 GeV. We determine the branching fractions of Λc+→ΛK+π0 and Λc+→ΛK+π+π− relative to their Cabibbo-favored counterparts to be B(Λc+→ΛK+π0)B(Λc+→Λπ+π0)=(2.09±0.39stat±0.07syst)×10−2 and B(Λc+→ΛK+π+π−)B(Λc+→Λπ+π+π−)=(1.13±0.41stat±0.06syst)×10−2 , respectively. Moreover, by combining our measured result with the world average of B(Λc+→Λπ+π0) , we obtain the branching fraction B(Λc+→ΛK+π0)=(1.49±0.27stat±0.05syst±0.08ref)×10−3 . This result significantly departs from theoretical predictions based on quark SU(3) flavor symmetry, which is underpinned by the presumption of meson pair S -wave amplitude dominance. Published by the American Physical Society 2024

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Le contrôle bibliographique ouvert

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

Titre Crossref
First observation of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mathvariant="normal">Λ</mml:mi><mml:mi>c</mml:mi><mml:mo>+</mml:mo></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:mi mathvariant="normal">Λ</mml:mi><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math> and evidence of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mathvariant="normal">Λ</mml:mi><mml:mi>c</mml:mi><mml:mo>+</mml:mo></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:mi mathvariant="normal">Λ</mml:mi><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>
Date Crossref
07/02/2024
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 il ne compte pas comme une seconde source scientifique indépendante.

Les 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 UniversityUniversity of Chinese Academy of SciencesNational Centre for Nuclear ResearchInstitute of Physics and TechnologyIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiCarnegie Mellon UniversityUniversity of MünsterWuhan UniversityIstinye 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 UniversityIndiana University BloomingtonHenan Normal UniversityUniversity of Hawaiʻi at MānoaUniversity of Hawaii SystemSuranaree University of TechnologySouth China Normal UniversityUniversity of the PunjabHangzhou Normal UniversityHuangshan UniversityUniversity of TarapacáUniversity of GroningenChina University of GeosciencesJustus-Liebig-Universität GießenIndian Institute of Technology MadrasQufu Normal UniversityRenmin University of ChinaLanzhou UniversitySichuan UniversityGuangxi Normal UniversityShanxi UniversityCentral China Normal UniversityHenan University of Science and TechnologyCentral South UniversityZhejiang UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaCOMSATS University IslamabadUniversity of PerugiaUniversity of South ChinaHunan Normal UniversityShanghai Jiao Tong UniversityShanxi Normal UniversityNear East UniversityHebei UniversityUniversity of Science and Technology LiaoningChina Center of Advanced Science and TechnologyInner Mongolia UniversityYantai UniversityBeihang UniversityHenan University

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

Les sujets associés

Particle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsMedical Imaging Techniques and Applications

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