0000000000514188

AUTHOR

Z. Zeng

showing 14 related works from this author

Measurement of the absolute branching fraction for Λc+→Λμ+νμ

2017

Abstract We report the first measurement of the absolute branching fraction for Λ c + → Λ μ + ν μ . This measurement is based on a sample of e + e − annihilation data produced at a center-of-mass energy s = 4.6  GeV , collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567  pb − 1 . The branching fraction is determined to be B ( Λ c + → Λ μ + ν μ ) = ( 3.49 ± 0.46 ( stat ) ± 0.27 ( syst ) ) % . In addition, we calculate the ratio B ( Λ c + → Λ μ + ν μ ) / B ( Λ c + → Λ e + ν e ) to be 0.96 ± 0.16 ( stat ) ± 0.04 ( syst ) .

Nuclear and High Energy PhysicsBESIII детекторElectron–positron annihilationAnalytical chemistryAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesLuminosityNOлептоны0103 physical sciencesAbsolute branching fraction010306 general physicsNuclear ExperimentPhysicsAnnihilation010308 nuclear & particles physicsBranching fraction?c +Absolute branching fraction; BESIII; Semi-leptonic decay; Λc+; Nuclear and High Energy PhysicsBESIIIΛc+lcsh:QC1-999BaryonBEPCII коллайдерSemi-leptonic decayHigh Energy Physics::ExperimentAstrophysics::Earth and Planetary Astrophysicslcsh:Physics
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Measurement of cross sections of the interactions e+e−→ ϕϕω and e+e−→ ϕϕϕ at center-of-mass energies from 4.008 to 4.600 GeV

2017

Abstract Using data samples collected with the BESIII detector at the BEPCII collider at six center-of-mass energies between 4.008 and 4.600 GeV, we observe the processes e + e − → ϕ ϕ ω and e + e − → ϕ ϕ ϕ . The Born cross sections are measured and the ratio of the cross sections σ ( e + e − → ϕ ϕ ω ) / σ ( e + e − → ϕ ϕ ϕ ) is estimated to be 1.75 ± 0.22 ± 0.19 averaged over six energy points, where the first uncertainty is statistical and the second is systematic. The results represent first measurements of these interactions.

Nuclear and High Energy PhysicsBESIII детекторe+e- annihilationElectron–positron annihilation01 natural sciencesNOlaw.inventionNuclear physicsCross section (physics)law0103 physical sciencesCross section; e+e−annihilation; Triple quarkonia; Nuclear and High Energy Physics010306 general physicsColliderTriple quarkoniaPhysicsAnnihilationCross section010308 nuclear & particles physicse+e−annihilatione+e− annihilationlcsh:QC1-999BEPCII коллайдерe+e? annihilationCenter of massCross section; e+e- annihilation; Triple quarkonia; Nuclear and High Energy Physicslcsh:Physics
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Improved measurements of two-photon widths of the χcJ states and helicity analysis for χc2→γγ

2017

Based on 448.1 x 10(6) Psi(3686) events collected with the BESIII detector, the decays Psi(3686) -> gamma chi(cJ), chi(cJ) -> gamma gamma(J = 0, 1, 2) are studied. The decay branching fractions of chi(c0,2) -> gamma gamma are measured to be B(chi(c0) -> gamma gamma) = (1.93 +/- 0.08 +/- 0.05 +/- 0.05) x 10(-4) and B(chi(c2) -> gamma gamma) = (3.10 +/- 0.09 +/- 0.07 +/- 0.11) x 10(-4) which correspond to two-photon decay widths of Gamma(gamma gamma)(chi(c0)) = 2.03 +/- 0.08 +/- 0.06 +/- 0.13 keV and Gamma(gamma gamma)(chi(c2)) = 0.60 +/- 0.02 +/- 0.01 +/- 0.04 keV with a ratio of R = Gamma(gamma gamma)(chi(c2))/Gamma(gamma gamma)(chi(c0)) = 0.295 +/- 0.014 +/- 0.007 +/- 0.027, where the unce…

PhysicsAnnihilation010308 nuclear & particles physics0103 physical sciencesAnalytical chemistry010306 general physics01 natural sciencesHelicityGamma gammaPhysical Review D
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Mutations activatrices de GNA11 et GNAQ en mosaïque dans les phacomatoses pigmento-vasculaires et les taches mongoliques étendues

2015

Introduction Les taches mongoliques, correspondant a une melanocytose dermique, sont frequentes a la naissance mais generalement transitoires. Elles peuvent parfois persister isolement ou en association a des angiomes plans dans les phacomatoses pigmento-vasculaires (types cesioflammea et cesiomarmorata), affections ou nous avons identifie des mutations en mosaique de deux genes de proteines G. Materiel et methodes Huit patients atteints de divers types de phacomatose pigmento-vasculaire et trois presentant une melanocytose dermique persistante etendue ont ete etudies par sequencage cible des genes GNAQ et GNA11 sur ADN de biopsie de peau pigmentee, d’angiome plan, de sang, ou dans un cas d…

DermatologyAnnales de Dermatologie et de Vénéréologie
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Observation of ψ(3686)→η′e+e−

2018

Abstract Using a data sample of 448.1 × 10 6 ψ ( 3686 ) events collected with the BESIII detector at the BEPCII collider, we report the first observation of the electromagnetic Dalitz decay ψ ( 3686 ) → η ′ e + e − , with significances of 7.0σ and 6.3σ when reconstructing the η ′ meson via its decay modes η ′ → γ π + π − and η ′ → π + π − η ( η → γ γ ), respectively. The weighted average branching fraction is determined to be B ( ψ ( 3686 ) → η ′ e + e − ) = ( 1.90 ± 0.25 ± 0.11 ) × 10 − 6 , where the first uncertainty is statistical and the second systematic.

Dalitz decayNuclear and High Energy PhysicsMesonElectron–positron annihilationBESIII; Charmonium; Dalitz decay; e+e− Annihilation; Nuclear and High Energy Physicse + e − Annihilation01 natural sciencesOmegaNOlaw.inventionBESIII; Charmonium; Dalitz decay; e+e−Annihilation; Nuclear and High Energy PhysicsNuclear physicslaw0103 physical sciencese+e−Annihilation010306 general physicsColliderCharmoniumPhysics010308 nuclear & particles physicsGenerator (category theory)Branching fractionBESIIIe+e− AnnihilationPseudoscalarBESIII; Charmonium; Dalitz decay; e + e − Annihilation ; Nuclear and High Energy PhysicsPhysics Letters B
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Measurements of cross section of e+e−→pp¯π0 at center-of-mass energies between 4.008 and 4.600 GeV

2017

Based on e(+)e(-) annihilation data samples collected with the BESIII detector at the BEPCII collider at 13 center-of-mass energies from 4.008 to 4.600 GeV, measurements of the Born cross section o ...

PhysicsNuclear and High Energy PhysicsParticle physicsAnnihilationPhysics::Instrumentation and Detectors010308 nuclear & particles physicsPartial wave analysisElectron–positron annihilationHadronDalitz plot01 natural scienceslaw.inventionNuclear physicslaw0103 physical sciencesHigh Energy Physics::ExperimentCenter of massBorn approximation010306 general physicsColliderPhysics Letters B
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Measurements of the branching fractions for D+→KS0KS0K+, KS0KS0π+ and D0→KS0KS0, KS0KS0KS0

2017

Abstract By analyzing 2.93 fb − 1 of data taken at the ψ ( 3770 ) resonance peak with the BESIII detector, we measure the branching fractions for the hadronic decays D + → K S 0 K S 0 K + , D + → K S 0 K S 0 π + , D 0 → K S 0 K S 0 and D 0 → K S 0 K S 0 K S 0 . They are determined to be B ( D + → K S 0 K S 0 K + ) = ( 2.54 ± 0.05 s t a t . ± 0.12 s y s . ) × 10 − 3 , B ( D + → K S 0 K S 0 π + ) = ( 2.70 ± 0.05 s t a t . ± 0.12 s y s . ) × 10 − 3 , B ( D 0 → K S 0 K S 0 ) = ( 1.67 ± 0.11 s t a t . ± 0.11 s y s . ) × 10 − 4 and B ( D 0 → K S 0 K S 0 K S 0 ) = ( 7.21 ± 0.33 s t a t . ± 0.44 s y s . ) × 10 − 4 , where the second one is measured for the first time and the others are measured wit…

PhysicsNuclear and High Energy PhysicsMeson010308 nuclear & particles physicsElectron–positron annihilation0103 physical sciencesHadronAnalytical chemistryResonance010306 general physicsBranching (polymer chemistry)01 natural sciencesPhysics Letters B
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Precise Measurement of the e(+)e(-) ->pi(+)pi(-) J/psi Cross Section at Center-of-Mass Energies from 3.77 to 4.60 GeV

2017

The cross section for the process e(+)e(-)-> pi(+) pi(-) J/psi is measured precisely at center-of-mass energies from 3.77 to 4.60 GeV using 9 fb(-1) of data collected with the BESIII detector operating at the BEPCII storage ring. Two resonant structures are observed in a fit to the cross section. The first resonance has a mass of (222.0 +/- 3.1 +/- 1.4) MeV/ c(2) and a width of (44.1 +/- 4.3 +/- 2.0)MeV, while the second one has a mass of (4320.0 +/- 10.4 +/- 7.0)MeV/c(2) and a width of (101.4(- 19.7)(+25.3) +/- 10.2) MeV, where the first errors are statistical and second ones are systematic. The first resonance agrees with the Y(4260) resonance reported by previous experiments. The prec…

Subatomär fysikSubatomic Physics
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Evidence of a Resonant Structure in the Cross Section between 4.05 and 4.60 GeV

2019

The cross section of the process e^{+}e^{-}→π^{+}D^{0}D^{*-} for center-of-mass energies from 4.05 to 4.60 GeV is measured precisely using data samples collected with the BESIII detector operating at the BEPCII storage ring. Two enhancements are clearly visible in the cross section around 4.23 and 4.40 GeV. Using several models to describe the dressed cross section yields stable parameters for the first enhancement, which has a mass of 4228.6±4.1±6.3  MeV/c^{2} and a width of 77.0±6.8±6.3  MeV, where the first uncertainties are statistical and the second ones are systematic. Our resonant mass is consistent with previous observations of the Y(4220) state and the theoretical prediction of a D…

PhysicsElectron–positron annihilationDetectorGeneral Physics and AstronomyResonanceState (functional analysis)01 natural sciencesCross section (physics)Amplitude0103 physical sciencesMoleculeAtomic physics010306 general physicsStorage ring
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Measurement of the Absolute Branching Fraction of the Inclusive Decay Λc+ → Λ+X

2018

Physical review letters 121(6), 062003 (2018). doi:10.1103/PhysRevLett.121.062003

Physics010308 nuclear & particles physicsBranching fractionElectron–positron annihilationHigh Energy Physics::PhenomenologyAnalytical chemistryGeneral Physics and AstronomyLambda01 natural sciences530NOLuminosityCharmed baryonsPhysics and Astronomy (all)0103 physical sciencesCP violationHigh Energy Physics::Experimentddc:530010306 general physicsBar (unit)
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Measurements of absolute hadronic branching fractions of the Λc+ baryon

2016

Kolcu, Onur Buğra (Arel Author) --- Makale 69 yazarlıdır.

Hadronic decayPhysicsParticle physicsBESIII детектор010308 nuclear & particles physicsBranching fractionElectron–positron annihilationадроныHigh Energy Physics::PhenomenologyHadronGeneral Physics and AstronomyBranching (polymer chemistry)Lambda01 natural sciencesNOdecayBaryonNuclear physicsPhysics and Astronomy (all)0103 physical sciencesбарионыHigh Energy Physics::Experiment010306 general physicsRadioactive decay
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Observation of a cross-section enhancement near mass threshold in e + e - → Λ Λ

2018

The process e(+)e(-) -> Lambda(Lambda) over bar is studied using data samples at root s = 2.2324, 2.400, 2.800 and 3.080 GeV collected with the BESIII detector operating at the BEPCII collider. The Born cross section is measured at root s = 2.2324 GeV, which is 1.0 MeVabove the Lambda(Lambda) over bar mass threshold, to be 305 +/- 45(-36)(+66) pb, where the first uncertainty is statistical and the second systematic. The cross section near threshold is larger than that expected from theory, which predicts the cross section to vanish at threshold. The Born cross sections at root s = 2.400, 2.800 and 3.080 GeV are measured and found to be consistent with previous experimental results, but with…

PhysicsPhysics and Astronomy (miscellaneous)010308 nuclear & particles physicsElectron–positron annihilationDetectorLambda01 natural scienceslaw.inventionNONuclear physicsCross section (physics)Near thresholdlaw0103 physical sciencesHigh Energy Physics::ExperimentBorn approximation010306 general physicsColliderBar (unit)
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Measurement of the absolute branching fraction of the inclusive semileptonic $\Lambda_c^+$ decay

2018

Physical review letters 121(25), 251801 (2018). doi:10.1103/PhysRevLett.121.251801

PhysicsSemileptonic decayParticle physicsMeson010308 nuclear & particles physicsBranching fractionElectron–positron annihilationAstrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::PhenomenologyGeneral Physics and AstronomyLambda53001 natural sciencesNOLuminosityHigh Energy Physics - ExperimentSubatomär fysikPhysics and Astronomy (all)Subatomic Physics0103 physical sciencesddc:530High Energy Physics::Experiment010306 general physicsEnergy (signal processing)Astrophysics::Galaxy Astrophysics
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Measurement of the phase between strong and electromagnetic amplitudes of J/ψ decays

2019

Kolcu, Onur Buğra (Arel Author)

Nuclear and High Energy PhysicsJ/Psi decayElectron–positron annihilationBESIII; Electromagnetic amplitude; J/ψ decay; Phase; Strong amplitude; High Energy Physics - Experiment; High Energy Physics - Experiment01 natural sciencesHigh Energy Physics - ExperimentNOSubatomär fysikSubatomic Physics0103 physical sciencesJ/ψ decayStrong amplitudeBorn approximation010306 general physicsPhysicsBESIII Electromagnetic amplitude J/ψ decay Phase Strong amplitudeAnnihilation010308 nuclear & particles physicsBranching fractionBESIIIlcsh:QC1-999BESIII; Electromagnetic amplitude; J/ψ decay; Phase; Strong amplitudeAmplitudeElectromagnetic amplitudePhaseHigh Energy Physics::ExperimentRelative phaseAtomic physicsJ/Psi Decaylcsh:Physics
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