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Accès ouvert déclaré 2025 article

Observation of D + → K S 0 π 0 μ + ν μ , Test of Lepton Flavor Universality, and First Angular Analysis of D + → K ¯ * ( 892 ) 0 ℓ + ν ℓ

0Citations signalées, ce qui n’est pas une note de qualité
92Institutions 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 report a study of the semileptonic decays D^{+}→K_{S}^{0}π^{0}ℓ^{+}ν_{ℓ} (ℓ=e, μ) based on 20.3 fb^{-1} of e^{+}e^{-} collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector. The D^{+}→K_{S}^{0}π^{0}μ^{+}ν_{μ} decay is observed for the first time, with a branching fraction of (0.896±0.017_{stat}±0.008_{syst})%, and the branching fraction of D^{+}→K_{S}^{0}π^{0}e^{+}ν_{e} is determined with the improved precision as (0.943±0.012_{stat}±0.010_{syst})%. From the analysis of the dynamics, we observe that the dominant K[over ¯]^{*}(892)^{0} component is accompanied by an S-wave contribution, which accounts for (7.10±0.68_{stat}±0.41_{syst})% of the total decay rate of the μ^{+} channel and (6.39±0.17_{stat}±0.14_{syst})% of the e^{+} channel. Assuming a single-pole dominance parametrization, the hadronic form factor ratios are extracted to be r_{V}=V(0)/A_{1}(0)=1.42±0.03_{stat}±0.02_{syst} and r_{2}=A_{2}(0)/A_{1}(0)=0.75±0.03_{stat}±0.01_{syst}. Based on the first comprehensive angular and the decay-rate CP asymmetry analysis, the full set of averaged angular and CP asymmetry observables are measured as a function of the momentum-transfer squared; they are consistent with expectations from the standard model. No evidence for violation of μ-e lepton-flavor universality is observed in either the full range or the five chosen bins of momentum-transfer squared.

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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 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mi>D</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> </mml:mrow> </mml:msup> <mml:mo stretchy="false">→</mml:mo> <mml:msubsup> <mml:mrow> <mml:mi>K</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>S</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>0</mml:mn> </mml:mrow> </mml:msubsup> <mml:msup>
Date Crossref
21/10/2025
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 ResearchMongolian Academy of SciencesIstituto 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 UniversityFudan UniversityInstitute of Modern PhysicsGuangxi University of Science and TechnologyJilin UniversityJilin Medical UniversityHunan UniversitySun Yat-sen 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 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 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 MedicineShanxi UniversityHenan 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 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 InteractionsBlack Holes and Theoretical Physics

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