Refine
Year of publication
Document Type
- Article (203)
- Preprint (183)
- Part of a Book (1)
Language
- English (387)
Has Fulltext
- yes (387)
Is part of the Bibliography
- no (387)
Keywords
- BESIII (19)
- e +-e − Experiments (16)
- Branching fraction (12)
- Particle and Resonance Production (8)
- Charm Physics (6)
- Quarkonium (6)
- Spectroscopy (6)
- Hadronic decays (5)
- Branching fractions (4)
- Charmonium (4)
- Exotics (4)
- Lepton colliders (4)
- Charmed mesons (3)
- Electroweak interaction (3)
- Initial state radiation (3)
- QCD (3)
- e+-e− Experiments (3)
- Absolute branching fraction (2)
- Bhabha (2)
- Charm physics (2)
- Cross section (2)
- Electroweak Interaction (2)
- Flavour Physics (2)
- Hadronic cross section (2)
- Leptonic, semileptonic & radiative decays (2)
- Muon anomaly (2)
- Particle decays (2)
- Pion form factor (2)
- Radiative decay (2)
- decays (2)
- Anapher <Syntax> (1)
- Angular distribution (1)
- Annihilation (1)
- BESIII detector (1)
- Biodiversity (1)
- Born cross section (1)
- Born cross section measurement (1)
- Branching fraction measurement (1)
- CP violation (1)
- Charm vector (1)
- Charmed baryon (1)
- Charmonium (-like) (1)
- Chinesisch (1)
- Covariance matrix (1)
- Cross section measurements (1)
- D meson (1)
- D0 and D+ mesons (1)
- Dalitz decay (1)
- Dark photon (1)
- Dark sector (1)
- D⁰ meson (1)
- Effective form factor (1)
- Electromagnetic amplitude (1)
- Electromagnetic form factor (1)
- Electromagnetic form factors (1)
- Experimental nuclear physics (1)
- Experimental particle physics (1)
- FOS: Physical sciences (1)
- Flavor changing neutral currents (1)
- Flavor symmetries (1)
- Form factors (1)
- Hadrons (1)
- Helicity amplitude analysis (1)
- High Energy Physics - Experiment (hep-ex) (1)
- Hyperons (1)
- ICN (1)
- Inclusive branching fraction (1)
- Invisible decays (1)
- K0S (1)
- Neutrinos (1)
- Particle and resonance production (1)
- Particle phenomena (1)
- Phase (1)
- Polarization (1)
- Proton (1)
- Prädikat (1)
- Quantum chromodynamics (1)
- R value (1)
- Rare decays (1)
- Semi-leptonic decays (1)
- Strong amplitude (1)
- Syntax (1)
- Techniques Electromagnetic calorimeters (1)
- Threshold effect (1)
- Triple quarkonia (1)
- W-exchange (1)
- Y (4260) (1)
- Y states (1)
- branching fractions (1)
- center-of-mass energy (1)
- charmed baryon (1)
- charmonium-like states (1)
- decay (1)
- dimuon (1)
- diphoton (1)
- e+e − annihilation (1)
- e+e⁻ − Experiments (1)
- e+e− Experiments (1)
- e+e− annihilation (1)
- electron-positron collision (1)
- hadron spectroscopy (1)
- hadronic events (1)
- helicity amplitude analysis (1)
- inclusive J/ψ decays (1)
- luminosity (1)
- nomenclature (1)
- number of J/ψ events (1)
- systematics (1)
- tetraquark (1)
- trigger efficiency (1)
- voucherless taxa (1)
- Λ+c baryon (1)
- Λc⁺ (1)
- Σ hyperon (1)
- ψ(3686) (1)
Based on e+e− collision samples corresponding to an integrated luminosity of 4.4 fb−1 collected with the BESIII detector at center-of-mass energies between 4.6GeV and 4.7GeV, a partial wave analysis of the charmed baryon hadronic decay Λ+c→Λπ+π0 is performed, and the decays Λ+c→Λρ(770)+ and Λ+c→Σ(1385)π are studied for the first time. Making use of the world-average branching fraction B(Λ+c→Λπ+π0), their branching fractions are determined to be B(Λ+c→Λρ(770)+)=B(Λ+c→Σ(1385)+π0)=B(Λ+c→Σ(1385)0π+)=(4.06±0.30±0.35±0.23)×10−2,(5.86±0.49±0.52±0.35)×10−3,(6.47±0.59±0.66±0.38)×10−3, where the first uncertainties are statistical, the second are systematic, and the third are from the uncertainties of the branching fractions B(Λ+c→Λπ+π0) and B(Σ(1385)→Λπ). In addition, %according to amplitudes determined from the partial wave analysis, the decay asymmetry parameters are measured to be αΛρ(770)+=−0.763±0.053±0.039, αΣ(1385)+π0=−0.917±0.069±0.046, and αΣ(1385)0π+=−0.789±0.098±0.056.
Using a data set of electron-positron collisions corresponding to an integrated luminosity of 2.93 fb−1 taken with the BESIII detector at a center-of-mass energy of 3.773 GeV, a search for the baryon (B) and lepton (L) number violating decays D±→n(n¯)e± is performed. No signal is observed and the upper limits on the branching fractions at the 90% confidence level are set to be 1.43×10−5 for the decays D+(−)→n¯(n)e+(−) with Δ|B−L|=0, and 2.91×10−5 for the decays D+(−)→n(n¯)e+(−) with Δ|B−L|=2 , where Δ|B−L| denotes the change in the difference between baryon and lepton numbers.
Using a data sample of (448.1±2.9)×106 𝜓(3686) decays collected at an 𝑒+𝑒− center-of-mass energy of 3.686 GeV by the BESIII detector at Beijing Electron Positron Collider II, we report an observation of the hindered electromagnetic Dalitz decay 𝜓(3686)→𝑒+𝑒−𝜂𝑐 with a significance of 7.9𝜎. The branching fraction is determined to be ℬ(𝜓(3686)→𝑒+𝑒−𝜂𝑐)=(3.77±0.40stat±0.18syst)×10−5, agreeing well with the prediction of the vector meson dominance model. This is the first measurement of the electromagnetic Dalitz transition between the 𝜓(3686) and the 𝜂𝑐, which provides new insight into the electromagnetic properties of this decay, and offers new opportunities to measure the absolute branching fractions of 𝜂𝑐 decays.
A measurement of the 𝐶𝑃-even fraction of the decay 𝐷0→𝜋+𝜋−𝜋+𝜋− is performed with a quantum-correlated 𝜓(3770)→𝐷¯𝐷 data sample collected by the BESIII experiment, corresponding to an integrated luminosity of 2.93 fb−1. Using a combination of 𝐶𝑃 eigenstates, 𝐷→𝜋+𝜋−𝜋0 and 𝐷→𝐾0𝑆,𝐿𝜋+𝜋− as tagging modes, the 𝐶𝑃-even fraction is measured to be 𝐹4𝜋+=0.735±0.015±0.005, where the first uncertainty is statistical and the second is systematic. This is the most precise determination of this quantity to date. It provides valuable model-independent input for the measurement of the angle 𝛾 of the Cabibbo-Kobayashi-Maskawa matrix with 𝐵±→𝐷𝐾± decays, and for time-dependent studies of 𝐶𝑃 violation and mixing in the 𝐷0−¯𝐷0 system.
A measurement of the CP-even fraction of the decay D0→π+π−π+π− is performed with a quantum-correlated ψ(3770)→DD¯ data sample collected by the BESIII experiment, corresponding to an integrated luminosity of 2.93 fb−1. Using a combination of CP eigenstates, D→π+π−π0 and D→K0S,Lπ+π− as tagging modes, the CP-even fraction is measured to be F4π+=0.735±0.015±0.005, where the first uncertainty is statistical and the second is systematic. This is the most precise determination of this quantity to date. It provides valuable model-independent input for the measurement of the CKM angle γ with B±→DK± decays, and for time-dependent studies of CP violation and mixing in the D0-D¯0 system.
Based on 7.33 fb−1 of e+e− collision data taken at center-of-mass energies between 4.128 and 4.226 GeV with the BESIII detector, we measure the branching fraction of D∗+s→D+sπ0 relative to that of D∗+s→D+sγ to be (6.16±0.43±0.19)%. The first uncertainty is statistical and the second one is systematic. By using the world average value of the branching fraction of D∗+s→D+se+e−, we determine the branching fractions of D∗+s→D+sγ and D∗+s→D+sπ0 to be (93.57±0.44±0.19)% and (5.76±0.44±0.19)%, respectively.
Using a data sample of (1.0087±0.0044)×1010 𝐽/𝜓 decay events collected with the BESIII detector at the center-of-mass energy of √𝑠=3.097 GeV, we present a search for the hyperon semileptonic decay Ξ0→Σ−𝑒+𝜈𝑒 which violates the Δ𝑆=Δ𝑄 rule. No significant signal is observed, and the upper limit on the branching fraction ℬ(Ξ0→Σ−𝑒+𝜈𝑒) is determined to be 1.6×10−4 at the 90% confidence level. This result improves the previous upper limit result by about one order of magnitude.
The Born cross sections of the e+e− → D*+D*− and e+e− → D*+D− processes are measured using e+e− collision data collected with the BESIII experiment at center-of-mass energies from 4.085 to 4.600 GeV, corresponding to an integrated luminosity of 15.7 fb−1. The results are consistent with and more precise than the previous measurements by the Belle, Babar and CLEO collaborations. The measurements are essential for understanding the nature of vector charmonium and charmonium-like states.
We report the first measurements of the absolute branching fractions of D0 → K0 Lϕ, D0 → K0Lη, D0 → K0Lω, and D0 → K0Lη0, by analyzing 2.93 fb−1 of eþe− collision data taken at a center-of-mass energy of 3.773 GeV with the BESIII detector. Taking the world averages of the branching fractions of D0 → K0Sϕ, D0 → K0Sη, D0 → K0Sω, and D0 → K0Sη0, the K0S − K0L asymmetries RðD0; XÞ in these decay modes are obtained. The CP asymmetries in these decays are also determined. No significant CP violation is observed
Study of ψ(3686) → ΛΛ¯ω
(2022)
Based on a data sample of (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider, the branching fraction of ψ(3686)→ΛΛ¯ω is measured to be (3.30±0.34(stat.)±0.29(syst.))×10−5 for the first time. In addition, the Λω (or Λ¯ω) invariant mass spectra is studied and the potential presence of excited Λ states has been investigated.