0000000000536052

AUTHOR

Y. X. Zhao Zhao

showing 3 related works from this author

Measurements of Sigma(+) and Sigma(-) time-like electromagnetic form factors for center-of-mass energies from 2.3864 to 3.0200 GeV

2021

Physics letters / B 814, 136110 (2021). doi:10.1016/j.physletb.2021.136110

Nuclear and High Energy Physicselectric [form factor]Electron–positron annihilationFOS: Physical sciencesSigma hyperonannihilation [electron positron]BESIII; Cross section; Electromagnetic form factor; Σ hyperonhyperon53001 natural sciencesHigh Energy Physics - ExperimentNOSubatomär fysikHigh Energy Physics - Experiment (hep-ex)Angular distributionAstronomi astrofysik och kosmologi0103 physical sciencesSubatomic PhysicsAstronomy Astrophysics and Cosmologyddc:530angular distributionstructure010306 general physicsElectromagnetic form factorPhysics2.3864-3.0200 GeV-cmsBESelectron positron --> Sigma+ Sigma-Cross section010308 nuclear & particles physicsHyperonBESIIIBeijing Storlcsh:QC1-999Sigma HyperonBaryonΣ hyperonmagnetic [form factor]ratio [form factor]valence [quark]colliding beams [electron positron]High Energy Physics::Experimentpair production [Sigma+]Atomic physicsform factor [Sigma-]electromagnetic [form factor]lcsh:Physicsform factor [Sigma+]experimental results
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Σ+ and Σ¯− Polarization in the J/ψ and ψ(3686) Decays

2020

From 1310.6 x 10(6) J/psi and 448.1 x 10(6) psi (3686) events collected with the BESIII experiment, we report the first observation of Sigma(+) and (Sigma) over bar (-) spin polarization in e(+)e(- ...

PhysicsSpin polarization0103 physical sciencesGeneral Physics and AstronomySigmaHigh Energy Physics::ExperimentAtomic physics010306 general physicsPolarization (waves)01 natural sciencesPhysical Review Letters
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Direct Measurement of the Branching Fractions B(ψ(3686)→J/ψX) and B(ψ(3770)→J/ψX) , and Observation of the State R(3760) in e+e−→J/ψX

2021

We report a measurement of the observed cross sections of e + e - → J / ψ X based on 3.21 fb - 1 of data accumulated at energies from 3.645 to 3.891 GeV with the BESIII detector operated at the BEPCII collider. In analysis of the cross sections, we measured the decay branching fractions of B ( ψ ( 3686 ) → J / ψ X ) = ( 64.4 ± 0.6 ± 1.6 ) % and B ( ψ ( 3770 ) → J / ψ X ) = ( 0.5 ± 0.2 ± 0.1 ) % for the first time. The energy-dependent line shape of these cross sections cannot be well described by two Breit-Wigner (BW) amplitudes of the expected decays ψ ( 3686 ) → J / ψ X and ψ ( 3770 ) → J / ψ X . Instead, it can be better described with one more BW amplitude of the decay R ( 3760 ) → J / …

Physics010308 nuclear & particles physicsBranching fraction0103 physical sciencesAnalytical chemistryGeneral Physics and AstronomyState (functional analysis)010306 general physicsBranching (polymer chemistry)01 natural sciencesPhysical Review Letters
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