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Accès ouvert déclaré 2026 article

First Observation of D 0 ( + ) → K ¯ ω e + ν e and Determination of the Branching Fraction of K ¯ 1 ( 1270 ) → K ¯ ω

0Citations signalées, ce qui n’est pas une note de qualité
85Institutions déclarées
16Pays d’affiliation déclarés

Rattachement africain : ru, se, cn, de, it, pl, 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 20.3 fb^{-1} of e^{+}e^{-} annihilation data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, we report the first observation of the semileptonic decays D^{0}→K^{-}ωe^{+}ν_{e} and D^{+}→K_{S}^{0}ωe^{+}ν_{e} with significances of 8.0σ and 5.8σ, respectively. Their decay branching fractions are measured to be B(D^{0}→K^{-}ωe^{+}ν_{e})=(9.4_{-1.8}^{+2.0}±0.6)×10^{-5} and B(D^{+}→K_{S}^{0}ωe^{+}ν_{e})=(8.0_{-2.1}^{+2.4}±0.7)×10^{-5}. Combining these with the latest measurements of D^{0(+)}→K^{-}π^{+}π^{-(0)}e^{+}ν_{e} and assuming K[over ¯]_{1}(1270) to be the sole mediating resonance in all processes, the branching ratios are determined to be {[Γ(K_{1}(1270)^{-}→K^{-}π^{+}π^{-})]/[Γ(K_{1}(1270)^{-}→K^{-}ω)]}=3.4_{-0.7}^{+0.8}±0.3 and {[Γ(K[over ¯]_{1}(1270)^{0}→K^{-}π^{+}π^{0})]/[Γ(K[over ¯]_{1}(1270)^{0}→K[over ¯]^{0}ω)]}=7.9_{-2.1}^{+2.4}±0.7. The combined branching fraction is determined to be B(K[over ¯]_{1}(1270)→K[over ¯]ω)=(8.4±1.4±0.5)%, which is the most precise measurement from a collider experiment. Furthermore, for the first time based on a single vector-pseudoscalar decay channel, the K[over ¯]_{1}(1270) mass is measured to be (1336±9±2) MeV/c^{2}, providing unique experimental support for the two-pole structure of the K[over ¯]_{1}(1270) resonance. The first uncertainties are statistical, and the second are systematic.

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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:msup> <mml:mi>D</mml:mi> <mml:mrow> <mml:mn>0</mml:mn> <mml:mo stretchy="false">(</mml:mo> <mml:mo>+</mml:mo> <mml:mo stretchy="false">)</mml:mo> </mml:mrow> </mml:msup> <mml:mo stretchy="false">→</mml:mo> <mml:mover accent="true"> <mml:mi>K</mml:mi> <mml:mo stretchy="false">¯</mml:mo> </mml:mover> <mml:mi>ω</mml:mi> <mml:msup> <mml:mi>e</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msub>
Date Crossref
26/08/2026
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 ResearchIstituto 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 GeosciencesHenan UniversityNanjing UniversityTsinghua UniversityFudan UniversityInstitute of Modern PhysicsGuangxi University of Science and TechnologyNorth China Electric Power UniversityChung-Ang UniversityUniversity of BristolYunnan UniversityHelmholtz Institute MainzRuhr University BochumUniversity of South ChinaLiaoning UniversityInner Mongolia UniversityHenan Normal UniversityUniversità degli Studi del Piemonte Orientale “Amedeo Avogadro”Piedmont UniversityUniversity of FerraraUniversity of ManchesterUniversity of OxfordGSI Helmholtz Centre for Heavy Ion ResearchJilin UniversityJilin Medical UniversityShandong University of TechnologyNanjing Normal UniversityShandong UniversityShandong Normal UniversityIndiana UniversityUniversity of Hawaii SystemSuranaree University of TechnologySouth China Normal UniversityUniversity of the PunjabHuangshan UniversityUniversity of JinanUniversity of TarapacáUniversity of GroningenIndian Institute of Technology MadrasJustus-Liebig-Universität GießenQufu Normal UniversityHunan Normal UniversityRenmin University of ChinaHebei UniversityHunan UniversityChina Center of Advanced Science and TechnologySichuan UniversityGuangxi Normal UniversityLiaoning Normal UniversityCentral China Normal UniversityShanxi University of Traditional Chinese MedicineGuangxi UniversityHenan University of Science and TechnologyHenan University of TechnologyCentral South UniversityZhejiang UniversityUniversity of PerugiaIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaHangzhou Normal UniversityShanghai Jiao Tong UniversityNear East UniversitySouthwest University of Science and TechnologyBeihang UniversityYantai UniversityHengyang Normal UniversityShanxi Normal UniversityUniversity of Science and Technology Liaoning

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

Les sujets associés

Quantum Chromodynamics and Particle InteractionsParticle physics theoretical and experimental studiesHigh-Energy Particle Collisions Research

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