0000000000300641

AUTHOR

Jianmin Dong

showing 7 related works from this author

Precision measurement of the D*(0) decay branching fractions

2015

WOS: 000349437800001

PhysicsNuclear and High Energy PhysicsBESIII детекторPhysics and Astronomy (miscellaneous)Mesonквантовая хромодинамикаAnalytical chemistryFOS: Physical sciencesNuclear and High Energy Physics; Physics and Astronomy (miscellaneous)Branching (polymer chemistry)QCD7. Clean energyMESONSHigh Energy Physics - ExperimentNONuclear physicsHigh Energy Physics - Experiment (hep-ex)бозоныPiPhysical Review D
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Precise Measurement of the e+e−→π+π−J/ψ 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 precisi…

Nuclear physicsPhysicsCross section (physics)010308 nuclear & particles physics0103 physical sciencesGeneral Physics and AstronomySigmaCenter of mass010306 general physics01 natural sciencesResonance (particle physics)Belle experimentStorage ringPhysical Review Letters
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Search for the rare decaysJ/ψ→Ds−ρ+andJ/ψ→D¯0K¯*0

2014

A search for the rare decays of J/psi -> D-S(-) rho(+) + c.c. and J/psi -> D-S(-)rho(+) + c.c.) <(D)over bar(0)<(K)over bar*(0) + c.c.) < 2.5 x 10(-6) at the 90% confidence level.

Nuclear physicsPhysicsNuclear and High Energy PhysicsBranching fractionElectron–positron annihilationHigh Energy Physics::ExperimentAstrophysicsBar (unit)Physical Review D
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Observation ofη′→ωe+e−

2015

Based on a sample of eta' mesons produced in the radiative decay J/psi -> gamma eta' in 1.31 x 10(9) J/psi events collected with the BESIII detector, the decay eta' -> omega e(+)e(-) is observed for the first time, with a statistical significance of 8 sigma. The branching fraction is measured to be B(eta' -> omega e(+)e(-)) = (1.97 +/- 0.34(stat) +/- 0.17(syst)) x 10(-4), which is in agreement with theoretical predictions. The branching fraction of eta' -> omega gamma is also measured to be (2.55 +/- 0.03(stat) +/- 0.16(syst)) x 10(-2), which is the most precise measurement to date, and the relative branching fraction B(eta' -> omega e(+)e(-))/B(eta' -> omega gamma) is determined to be (7.7…

PhysicsNuclear physicsNuclear and High Energy PhysicsMesonBranching fractionElectron–positron annihilationAnalytical chemistryRadiative decayHigh Energy Physics::ExperimentVector meson dominanceNuclear ExperimentOmegaPhysical Review D
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Measurement of thee+e−→ηJ/ψcross section and search fore+e−→π0J/ψat center-of-mass energies between 3.810 and 4.600 GeV

2015

Using data samples collected with the BESIII detector operating at the BEPCII collider at 17 center-of-mass energies from 3.810 to 4.600 GeV, we perform a study of e(+)e(-) -> eta J/psi and pi(0)J/psi The Born cross sections of these two processes are measured at each center-of-mass energy. The measured energy-dependent Born cross section for e(+)e(-) -> eta J/psi shows an enhancement around 4.2 GeV. The measurement is compatible with an earlier measurement by Belle.

PhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsElectron–positron annihilation01 natural scienceslaw.inventionMass enhancementNuclear physicsCross section (physics)law0103 physical sciencesHigh Energy Physics::ExperimentCenter of massNuclear Experiment010306 general physicsColliderPhysical Review D
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Measurements of the absolute branching fractions forDs+→ηe+νeandDs+→η′e+νe

2016

By analyzing 482 pb(-1) of e(+)e(-) collision data collected at root s = 4.009 GeV with the BESIII detector at the BEPCII collider, we measure the absolute branching fractions for the semileptonic decays D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e) to be B(D-s(+) -> eta e(+)nu(e)) = (2.30 +/- 0.31 +/- 0.08)% and B(D-s(+) -> eta ' e(+)nu(e)) = (0.93 +/- 0.30 +/- 0.05)%, respectively, and their ratio B(D-s(+) -> eta ' e(+)nu(e)) / B(D-s(+) -> eta ' e(+)nu(e)) = 0.40 +/- 0.14 +/- 0.02, where the first uncertainties are statistical and the second ones are systematic. The results are in good agreement with previous measurements within uncertainties; they can be used to determine the eta…

Physics010308 nuclear & particles physicsBranching fractionElectron–positron annihilation0103 physical sciencesAnalytical chemistryHigh Energy Physics::ExperimentAstrophysics::Earth and Planetary AstrophysicsAtomic physicsNuclear Experiment010306 general physicsBranching (polymer chemistry)01 natural sciencesPhysical Review D
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Precise Measurement of the e+e− → π+π−J/ψ Cross Section at Center-of-Mass Energies from 3.77 to 4.60 GeV

2020

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 precisi…

Nuclear physicsPhysicsCross section (physics)SigmaCenter of massResonance (particle physics)Belle experimentStorage ring30 Years of BES Physics
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