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First Measurement of the Decay Dynamics in the Semileptonic Transition of D + ( 0 ) into the Axial-Vector Meson K ¯ 1 ( 1270 )

3Citations signalées, ce qui n’est pas une note de qualité
91Institutions 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

Using e^{+}e^{-} data taken at the center-of-mass energy of 3.773 GeV with the BESIII detector, corresponding to an integrated luminosity of 20.3 fb^{-1}, we report the first measurement of the decay dynamics of the semileptonic decays D^{+(0)}→K^{-}π^{+}π^{0(-)}e^{+}ν_{e}. The amplitude analysis gives the hadronic form factors of the semileptonic D transitions into the axial-vector meson K[over ¯]_{1}(1270) to be r_{A}=(-11.2±1.0_{stat}±0.9_{syst})×10^{-2} and r_{V}=(-4.3±1.0_{stat}±2.5_{syst})×10^{-2}. This is the first in the semileptonic decays of heavy mesons into axial-vector mesons. The angular analysis yields an up-down asymmetry A_{ud}^{'}=0.01±0.11, which is consistent with the standard model prediction. In addition, the branching fractions of D^{+}→K[over ¯]_{1}(1270)^{0}e^{+}ν_{e} and D^{0}→K_{1}(1270)^{-}e^{+}ν_{e} are determined with improved precision to be (2.27±0.11_{stat}±0.07_{syst}±0.07_{input})×10^{-3} and (1.02±0.06_{stat}±0.06_{syst}±0.03_{input})×10^{-3}, respectively. No significant signals of D^{+}→K[over ¯]_{1}(1400)^{0}e^{+}ν_{e} and D^{0}→K_{1}(1400)^{-}e^{+}ν_{e} are observed and their branching fraction upper limits are set as 1.4×10^{-4} and 0.7×10^{-4} at 90% confidence level, respectively.

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Le contrôle bibliographique ouvert

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

Titre Crossref
First Measurement of the Decay Dynamics in the Semileptonic Transition of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mi mathvariant="normal">D</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mo stretchy="false">(</mml:mo> <mml:mn>0</mml:mn> <mml:mo stretchy="false">)</mml:mo> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> into the Axial-Vector Meson <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msub>
Date Crossref
25/08/2025
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

Institute of High Energy PhysicsSiberian Branch of the Russian Academy of SciencesBudker Institute of Nuclear PhysicsUppsala UniversityZhengzhou UniversityJohannes Gutenberg University MainzUniversity of TurinUniversity of Science and Technology of ChinaSoutheast UniversityJoint Institute for Nuclear ResearchPeking UniversityUniversity of Chinese Academy of SciencesNational Centre for Nuclear ResearchInstitute of Physics and TechnologyIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIstituto Nazionale di Fisica Nucleare, Sezione di FerraraCarnegie Mellon UniversityUniversity of MünsterWuhan UniversityLanzhou UniversityIstinye UniversityNankai UniversityChina University of GeosciencesSoochow UniversityHenan UniversityNorth China Electric Power UniversityNanjing UniversityTsinghua UniversityInstitute of Modern PhysicsJilin UniversityJilin Medical UniversityHunan UniversitySun Yat-sen UniversityChung-Ang UniversityFudan UniversityShandong 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 University BloomingtonIndiana UniversityUniversity of Hawaiʻi at MānoaUniversity 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 GießenQufu Normal UniversityLiaoning Normal UniversityRenmin University of ChinaHebei UniversityChina Center of Advanced Science and TechnologySichuan UniversityGuangxi Normal UniversityShanxi 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 PerugiaHunan Normal UniversityShanghai Jiao Tong UniversityNear East UniversityBeihang UniversityYantai UniversityUniversity of BristolShanxi 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 studiesNeutrino Physics ResearchDark Matter and Cosmic Phenomena

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