Refine
Year of publication
Language
- English (609)
Has Fulltext
- yes (609)
Is part of the Bibliography
- no (609)
Keywords
- Heavy Ion Experiments (11)
- Hadron-Hadron Scattering (8)
- LHC (7)
- Branching fraction (5)
- Hadron-Hadron scattering (experiments) (5)
- Collective Flow (4)
- Jets (4)
- Quark-Gluon Plasma (4)
- Quarkonium (4)
- ALICE (3)
- ALICE experiment (3)
- BESIII (3)
- Electroweak interaction (3)
- Experimental nuclear physics (3)
- Experimental particle physics (3)
- Heavy-ion collision (3)
- Jets and Jet Substructure (3)
- Lepton colliders (3)
- pp collisions (3)
- Beauty production (2)
- Charmed mesons (2)
- Hadronic decays (2)
- Heavy Quark Production (2)
- Initial state radiation (2)
- Lepton-Nucleon Scattering (experiments) (2)
- Leptonic, semileptonic & radiative decays (2)
- Particle Correlations and Fluctuations (2)
- Particle and Resonance Production (2)
- Particle and resonance production (2)
- Particle decays (2)
- QCD (2)
- RHIC (2)
- Single electrons (2)
- e +-e − Experiments (2)
- e+-e− Experiments (2)
- 900 GeV (1)
- Bhabha (1)
- Biogeography (1)
- Bipolar disorder (1)
- Boosted Jets (1)
- Branching fractions (1)
- Charged-particle multiplicity (1)
- Charm physics (1)
- Charmonia (1)
- Cold nuclear matter effects (1)
- Collective Flow, (1)
- Collectivity (1)
- Comparison with QCD (1)
- Correlation (1)
- Depression (1)
- Developmental biology (1)
- Di-hadron correlations (1)
- Diffraction (1)
- Ecology (1)
- Ecophysiology (1)
- Elastic scattering (1)
- Electromagnetic form factors (1)
- Exotics (1)
- Extracellular matrix (1)
- Femtoscopy (1)
- Flavor changing neutral currents (1)
- Flow (1)
- Form factors (1)
- Genetics (1)
- Groomed jet radius (1)
- HBT (1)
- Hadron production (1)
- Hadron-Hadron Scattering Heavy (1)
- Hadron-hadron interactions (1)
- Hadronic cross section (1)
- Hard Scattering (1)
- Heavy Ion Experiment (1)
- Heavy Ions (1)
- Heavy flavor production (1)
- Heavy flavour production (1)
- Heavy ion storage ring (1)
- Heavy-flavour production (1)
- Heavy-ion (1)
- Heavy-ion collisions (1)
- Hyperons (1)
- Inclusive spectra (1)
- Intensity interferometry (1)
- Interference fragmentation function (1)
- J/ψ suppression (1)
- Jet Physics (1)
- Jet Substructure (1)
- Jet substructure (1)
- Material budget (1)
- Mid-rapidity (1)
- Multi-Parton Interactions (1)
- Multi-strange baryons (1)
- Multiple parton interactions (1)
- Muon anomaly (1)
- Neuroscience (1)
- Neutrinos (1)
- Nonflow (1)
- Nuclear modification factor (1)
- Orbital electron capture (1)
- PYTHIA (1)
- Particle correlations and fluctuations (1)
- Particle phenomena (1)
- Pb–Pb (1)
- Pion form factor (1)
- Polarization (1)
- Properties of Hadrons (1)
- Proton (1)
- Proton-proton collisions (1)
- Proton–proton (1)
- Quantum chromodynamics (1)
- Quark Deconfinement (1)
- Quark Gluon Plasma (1)
- Quark Production (1)
- R value (1)
- Rare decays (1)
- Relativistic heavy-ion collisions (1)
- Respiratory tract diseases (1)
- STAR (1)
- Shear viscosity (1)
- Single muons (1)
- Single particle decay spectroscopy (1)
- SoftDrop (1)
- Spectroscopy (1)
- Spin alignment (1)
- Splitting function (1)
- Techniques Electromagnetic calorimeters (1)
- Transverse momentum (1)
- Transversity (1)
- Two body weak decay (1)
- Vector Boson Production (1)
- detector (1)
- diphoton (1)
- experimental results (1)
- luminosity (1)
- meson (1)
- p+p collisions (1)
- spectra (1)
- √sN N = 2.76 TeV (1)
Institute
- Physik (602)
- Frankfurt Institute for Advanced Studies (FIAS) (491)
- Informatik (472)
- Informatik und Mathematik (3)
- Medizin (3)
- Biowissenschaften (2)
- Biochemie, Chemie und Pharmazie (1)
- ELEMENTS (1)
- Geowissenschaften / Geographie (1)
- Zentrum für Arzneimittelforschung, Entwicklung und Sicherheit (ZAFES) (1)
We present the first experimental search for the rare charm decay D0→π0ν¯ν. It is based on an e+e− collision sample consisting of 10.6×10^6 pairs of D0¯D0 mesons collected by the BESIII detector at √s=3.773 GeV, corresponding to an integrated luminosity of 2.93 fb^−1. A data-driven method is used to ensure the reliability of the background modeling. No significant D0→π0ν¯ν signal is observed in data and an upper limit of the branching fraction is set to be 2.1×10^-4 at the 90% confidence level. This is the first experimental constraint on charmed-hadron decays into dineutrino final states.
We report a measurement of the observed cross sections of e+ e− → J/ψX 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/ψX) = (64.4 ± 0.6 ± 1.6)% and B(ψ(3770) → J/ψX) = (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/ψX and ψ(3770) → J/ψX. Instead, it can be better described with one more BW amplitude of the decay R(3760)→ J/ψX. Under this assumption, we extracted the R (3760) mass M R (3760 ) = 3766.2 ± 3.8 ± 0.4 MeV/c2, total width Γ tot R ( 3760 ) = 22.2 ± 5.9 ± 1.4 MeV, and product of leptonic width and decay branching fraction
ΓeeR(3760) B[R(3760) → J/ψX] = (79.4 ± 85.5 ± 11.7) eV. The significance of the R(3760) is 5.3σ. The first uncertainties of these measured quantities are from fits to the cross sections and second systematic.
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 measure the inclusive semielectronic decay branching fraction of the D+s meson. A double-tag technique is applied to e+e− annihilation data collected by the BESIII experiment at the BEPCII collider, operating in the center-of-mass energy range 4.178–4.230 GeV. We select positrons fromD+s→Xe+νe with momenta greater than 200 MeV/c and determine the laboratory momentum spectrum, accounting for the effects of detector efficiency and resolution. The total positron yield and semielectronic branching fraction are determined by extrapolating this spectrum below the momentum cutoff. We measure the D+s semielectronic branching fraction to be(6.30±0.13(stat.)±0.09(syst.)±0.04(ext.))%, showing no evidence for unobserved exclusive semielectronic modes. We combine this result with external data taken from literature to determine the ratio of the D+s and D0 semielectronic widths, Γ(D+s→Xe+νe)Γ(D0→Xe+νe)=0.790±0.016(stat.)±0.011(syst.)±0.016(ext.). Our results are consistent with and more precise than previous measurements.
Using a sample of (10.09±0.04)×109 J/ψ events collected with the BESIII detector, a partial wave analysis of J/ψ→γη′η′ is performed.The masses and widths of the observed resonances and their branching fractions are reported. The main contribution is from J/ψ→γf0(2020) with f0(2020)→η′η′, which is found with a significance of greater than 25σ. The product branching fraction B(J/ψ → γf0(2020))⋅B(f0(2020) → η′η′ is measured to be (2.63±0.06(stat.) + 0.31−0.46(syst.))×10−4.
By using 6.32 fb−1 of data collected with the BESIII detector at center-of-mass energies between 4.178 and 4.226 GeV, we perform an amplitude analysis of the decay D+s ! K0S + 0 and determine the relative fractions and phase differences of different intermediate processes, which include K0S (770)+, K0S (1450)+, K (892)0 +, K (892)+ 0, and K (1410)0 +. With the detection efficiency based on the amplitude analysis results, the absolute branching fraction is measured to be B(D+s ! K0S + 0) = (5.43 ± 0.30stat ± 0.15syst) × 10−3.
Using 10.1 × 109 J/ψ events produced by the Beijing Electron Positron Collider (BEPCII) at a center-of-mass energy √s = 3.097 GeV and collected with the BESIII detector, we present a search for the rare semi-leptonic decay J/ψ → D−e+νe + c.c. No excess of signal above background is observed, and an upper limit on the branching fraction ℬ(J/ψ → D−e+νe + c. c.) < 7.1 × 10−8 is obtained at 90% confidence level. This is an improvement of more than two orders of magnitude over the previous best limit.
Based on an e+e− collision data sample corresponding to an integrated luminosity of 2.93 fb−1 collected with the BESIII detector at √s=3.773 GeV, the first amplitude analysis of the singly Cabibbo-suppressed decay D+→K+K0Sπ0 is performed. From the amplitude analysis, the K∗(892)+K0S component is found to be dominant with a fraction of (57.1±2.6±4.2)%, where the first uncertainty is statistical and the second systematic. In combination with the absolute branching fraction B(D+→K+K0Sπ0) measured by BESIII, we obtain B(D+→K∗(892)+K0S)=(8.69±0.40±0.64±0.51)×10−3, where the third uncertainty is due to the branching fraction B(D+→K+K0Sπ0). The precision of this result is significantly improved compared to the previous measurement. This result also differs from most of theoretical predictions by about 4σ, which may help to improve the understanding of the dynamics behind.
By analyzing 6.32 fb − 1 of e+ e− annihilation data collected at the center-of-mass energies between 4.178 and 4.226 GeV with the BESIII detector, we determine the branching fraction of the leptonic decay D + s → τ + ντ, with τ+ → π + π0¯ντ, to be B D + s → τ + ν τ = (5.29 ± 0.25 stat ± 0.20 syst) %. We estimate the product of the Cabibbo-Kobayashi-Maskawa matrix element |Vcs|and the D + s decay constant f D + s to be f D + s|Vcs| = (244.8 ± 5.8 stat ± 4.8syst) MeV, using the known values of the τ + and D + s masses as well as the D + s lifetime, together with our branching fraction measurement. Combining the value of |Vcs| obtained from a global fit in the standard model and f D + s from lattice quantum chromodynamics, we obtain f D + s = (251.6 ± 5.9 stat ± 4.9syst) MeV and |Vcs| = 0.980 ± 0.023 stat ± 0.019 syst. Using the branching fraction of B D + s → μ + νμ = (5.35±0.21)×10−3, we obtain the ratio of the branching fractions B D + s → τ + ντ/B D +s → μ+νμ = 9.89±0.71, which is consistent with the standard model prediction of lepton flavor universality.
The process e+e−→ϕη is studied at 22 center-of-mass energy points (√s) between 2.00 and 3.08 GeV using 715 pb−1 of data collected with the BESIII detector. The measured Born cross section of e+e−→ϕη is found to be consistent with BABAR measurements, but with improved precision. A resonant structure around 2.175 GeV is observed with a significance of 6.9σ with mass (2163.5±6.2±3.0) MeV/c2 and width (31.1+21.1−11.6±1.1) MeV, where the first uncertainties are statistical and the second are systematic.