Refine
Year of publication
Document Type
- Preprint (790)
- Article (651)
- Working Paper (1)
Language
- English (1442)
Has Fulltext
- yes (1442)
Is part of the Bibliography
- no (1442)
Keywords
- BESIII (19)
- e +-e − Experiments (16)
- Hadron-Hadron Scattering (14)
- Heavy Ion Experiments (14)
- Branching fraction (12)
- LHC (10)
- Particle and Resonance Production (9)
- Quarkonium (9)
- Charm Physics (6)
- Heavy-ion collisions (6)
- Jets (6)
- Spectroscopy (6)
- Hadronic decays (5)
- Heavy Quark Production (5)
- ALICE experiment (4)
- Branching fractions (4)
- Charm physics (4)
- Charmonium (4)
- Collective Flow (4)
- Exotics (4)
- Hadron-Hadron scattering (experiments) (4)
- Lepton colliders (4)
- QCD (4)
- Quark-Gluon Plasma (4)
- ALICE (3)
- Charmed mesons (3)
- Diffraction (3)
- Elastic scattering (3)
- Electroweak interaction (3)
- Experimental nuclear physics (3)
- Experimental particle physics (3)
- Heavy Ions (3)
- Heavy-ion collision (3)
- Initial state radiation (3)
- Jets and Jet Substructure (3)
- Polarization (3)
- e+-e− Experiments (3)
- pp collisions (3)
- Absolute branching fraction (2)
- Beam Energy Scan (2)
- Beauty production (2)
- Bhabha (2)
- Chiral Magnetic Effect (2)
- Collectivity (2)
- Correlation (2)
- Cross section (2)
- Electroweak Interaction (2)
- Elliptic flow (2)
- Flavour Physics (2)
- Genetics (2)
- Hadronic cross section (2)
- Heavy ion collisions (2)
- Heavy-Ion Collision (2)
- Leptonic, semileptonic & radiative decays (2)
- Monte Carlo (2)
- Muon anomaly (2)
- Particle Correlations and Fluctuations (2)
- Particle decays (2)
- Pb–Pb collisions (2)
- Pion form factor (2)
- Quark Gluon Plasma (2)
- RHIC (2)
- Radiative decay (2)
- Relativistic heavy-ion collisions (2)
- STAR (2)
- Shear viscosity (2)
- Single electrons (2)
- Systematic Uncertainty (2)
- Time Projection Chamber (2)
- decays (2)
- 900 GeV (1)
- ADHD (1)
- ALICE LHC (1)
- ALICE detector (1)
- Analysis and statistical methods (1)
- Angular distribution (1)
- Annihilation (1)
- Anti-nuclei (1)
- Atmospheric chemistry (1)
- Atmospheric science (1)
- Azimuthal correlations (1)
- B-slope (1)
- BESIII detector (1)
- Balance function (1)
- Beam energy scan (1)
- Boosted Jets (1)
- Born cross section (1)
- Born cross section measurement (1)
- Brain (1)
- Branching fraction measurement (1)
- CLOUD experiment (1)
- COVID-19 (1)
- CP violation (1)
- Calorimeters (1)
- Canonical suppression (1)
- Centrality Class (1)
- Centrality Selection (1)
- Charge correlations (1)
- Charged-particle density (1)
- Charged-particle multiplicity (1)
- Charm quark spatial diffusion coefficient (1)
- Charm vector (1)
- Charmed baryon (1)
- Charmonia (1)
- Charmonium (-like) (1)
- Chiral magnetic effect (1)
- Climate change (1)
- Coalescence (1)
- Cold nuclear matter effects (1)
- Collective Flow, (1)
- Comparison with QCD (1)
- Course (1)
- Covariance matrix (1)
- Critical point (1)
- Cross section measurements (1)
- D meson (1)
- D0 and D+ mesons (1)
- Dalitz decay (1)
- Dark photon (1)
- Dark sector (1)
- Data processing methods (1)
- Data sharing (1)
- Deuteron production (1)
- Di-hadron correlations (1)
- Diagnosis (1)
- D⁰ meson (1)
- Effective form factor (1)
- Electromagnetic amplitude (1)
- Electromagnetic form factor (1)
- Electromagnetic form factors (1)
- Electron-pion identification (1)
- FOS: Physical sciences (1)
- Femtoscopy (1)
- Fibre/foam sandwich radiator (1)
- Flavor changing neutral currents (1)
- Flavor symmetries (1)
- Flow (1)
- Form factors (1)
- Forward physics (1)
- Groomed jet radius (1)
- HBT (1)
- Hadron production (1)
- Hadron-Hadron Scattering Heavy (1)
- Hadron-hadron interactions (1)
- Hadronization (1)
- Hadrons (1)
- Hard Scattering (1)
- Heavy Ion Experiment (1)
- Heavy flavor production (1)
- Heavy flavour production (1)
- Heavy ion storage ring (1)
- Heavy ions (1)
- Heavy-flavor decay electron (1)
- Heavy-flavour decay muons (1)
- Heavy-flavour production (1)
- Heavy-ion (1)
- Heavy-ion detectors (1)
- Helicity amplitude analysis (1)
- High Energy Physics - Experiment (hep-ex) (1)
- Higher moments (1)
- Hyperons (1)
- Inclusive branching fraction (1)
- Inclusive spectra (1)
- Intensity interferometry (1)
- Interference fragmentation function (1)
- Invariant Mass Distribution (1)
- Invisible decays (1)
- Ionisation energy loss (1)
- J/ψ suppression (1)
- Jet Physics (1)
- Jet Substructure (1)
- Jet substructure (1)
- K0S (1)
- Large Hadron Collider (1)
- Large detector systems for particle and astroparticle physics (1)
- Lepton-Nucleon Scattering (experiments) (1)
- Material budget (1)
- Mid-rapidity (1)
- Minimum Bias (1)
- Molecular biology (1)
- Mongolia (1)
- Multi-Parton Interactions (1)
- Multi-strange baryons (1)
- Multi-wire proportional drift chamber (1)
- Multiple parton interactions (1)
- NMR spectroscopy (1)
- Net-charge correlations (1)
- Net-charge fluctuations (1)
- Neural network (1)
- Neutrinos (1)
- Nonflow (1)
- Nuclear Physics (1)
- Nuclear modification factor (1)
- Orbital electron capture (1)
- Outcome (1)
- PYTHIA (1)
- Particle and resonance production (1)
- Particle correlations and fluctuations (1)
- Particle phenomena (1)
- Particle production (1)
- Pb–Pb (1)
- Performance of High Energy Physics Detectors (1)
- Phase (1)
- Production Cross Section (1)
- Properties of Hadrons (1)
- Proton (1)
- Proton-proton collisions (1)
- Proton–proton (1)
- Proton–proton collisions (1)
- QGP (1)
- Quantum chromodynamics (1)
- Quark Deconfinement (1)
- Quark Production (1)
- Quark–gluon plasma (1)
- R value (1)
- Rapidity Range (1)
- Rare decays (1)
- Relativistic heavy ion physics (1)
- Resolution Parameter (1)
- Resonances (1)
- SARS-CoV-2 (1)
- Semi-leptonic decays (1)
- Single muons (1)
- Single particle decay spectroscopy (1)
- SoftDrop (1)
- Spin alignment (1)
- Splitting function (1)
- Strangeness enhancement (1)
- Strong amplitude (1)
- TR (1)
- Techniques Electromagnetic calorimeters (1)
- Thermal model (1)
- Threshold effect (1)
- Tracking (1)
- Transition radiation detector (1)
- Transverse Momentum (1)
- Transverse momentum (1)
- Transversity (1)
- Treatment (1)
- Trigger (1)
- Triple quarkonia (1)
- Two body weak decay (1)
- Vector Boson Production (1)
- W-exchange (1)
- Wide rapidity coverage (1)
- Xenon-based gas mixture (1)
- Y (4260) (1)
- Y states (1)
- accessory proteins (1)
- aerosol formation (1)
- aerosols (1)
- alleles (1)
- autism spectrum disorder (1)
- autistic disorder (1)
- branching fractions (1)
- cell-free protein synthesis (1)
- center-of-mass energy (1)
- charmed baryon (1)
- charmonium-like states (1)
- copy number polymorphism (1)
- dE/dx (1)
- decay (1)
- detector (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)
- experimental results (1)
- genes (1)
- genetics (1)
- genome (1)
- genotype (1)
- genotype determination (1)
- global change (1)
- habitat destruction (1)
- hadron spectroscopy (1)
- hadronic events (1)
- heavy ion experiments (1)
- heavy-ion collisions (1)
- helicity amplitude analysis (1)
- inclusive J/ψ decays (1)
- intrinsically disordered region (1)
- land use (1)
- luminosity (1)
- nanoparticle growth (1)
- nomadic lifestyles (1)
- nonstructural proteins (1)
- number of J/ψ events (1)
- p+p collisions (1)
- phenotype (1)
- quark gluon plasma (1)
- rangeland ecosystems (1)
- rural-urban migration (1)
- single nucleotide polymorphism (1)
- spectra (1)
- steppe ecosystem (1)
- structural proteins (1)
- tetraquark (1)
- trigger efficiency (1)
- volatile organic compounds (1)
- wildlife mobility (1)
- Λ+c baryon (1)
- Λc⁺ (1)
- Σ hyperon (1)
- Υ suppression (1)
- ψ(3686) (1)
- √sN N = 2.76 TeV (1)
Institute
- Physik (1304)
- Frankfurt Institute for Advanced Studies (FIAS) (905)
- Informatik (770)
- Medizin (13)
- Geowissenschaften (7)
- Geowissenschaften / Geographie (3)
- Informatik und Mathematik (3)
- ELEMENTS (2)
- Hochschulrechenzentrum (2)
- Biochemie, Chemie und Pharmazie (1)
Using (2712±14) × 106 ψ(2S) events collected with the BESIII detector at the BEPCII collider, we search for the decays ηc(2S)→ωω and ηc(2S)→ωϕ via the process ψ(2S)→γηc(2S). Evidence of ηc(2S)→ωω is found with a statistical significance of 3.2σ. The branching fraction is measured to be B(ηc(2S)→ωω)=(5.65±3.77(stat.)±5.32(syst.))×10−4. No statistically significant signal is observed for the decay ηc(2S)→ωϕ. The upper limit of the branching fraction at the 90\% confidence level is determined to be B(ψ(2S)→γηc(2S),ηc(2S)→ωϕ)<2.24×10−7. We also update the branching fractions of χcJ→ωω and χcJ→ωϕ decays via the ψ(2S)→γχcJ transition. The branching fractions are determined to be B(χc0→ωω)=(10.63±0.11±0.46)×10−4, B(χc1→ωω)=(6.39±0.07±0.29)×10−4, B(χc2→ωω)=(8.50±0.08±0.38)×10−4, B(χc0→ωϕ)=(1.18±0.03±0.05)×10−4, B(χc1→ωϕ)=(2.03±0.15±0.12)×10−5, and B(χc2→ωϕ)=(9.37±1.07±0.59)×10−6, where the first uncertainties are statistical and the second are systematic.
In the effective field theory, the massless dark photon γ′ can only couple with the Standard Model particle through operators of dimension higher than four, thereby offering a high sensitivity to the new physics energy scale. Using 7.9 fb−1 of e+e− collision data collected at s√=3.773 GeV with the BESIII detector at the BEPCII collider, we measure the effective flavor-changing neutral current coupling of cuγ′ in D0→ωγ′ and D0→γγ′ processes to search for the massless dark photon. No significant signals are observed, and the upper limits at the 90% confidence level on the massless dark photon branching fraction are set to be 1.1×10−5 and 2.0×10−6 for D0→ωγ′ and D0→γγ′, respectively. These results provide the most stringent constraint on the new physics energy scale associated with cuγ′ coupling in the world, with the new physics energy scale related parameter |C|2+|C5|2<8.2×10−17 GeV−2 at the 90% confidence level, playing a unique role in the dark sector search with the charm sector.
We perform the first investigation of the process e+e−→K+K−ψ(2S) and report its Born cross sections over a range of center-of-mass energies from 4.699 to 4.951~GeV. The measurements are carried out using several partial reconstruction techniques using data samples collected by the BESIII detector with a total integrated luminosity of 2.5~fb−1. We search for new tetraquark candidates Z±cs in the decays Z±cs→K±ψ(2S). No significant Z±cs signals are observed.
The processes hc→γP(P=η′, η, π0)) are studied with a sample of (27.12±0.14)×108 ψ(3686) events collected by the BESIII detector at the BEPCII collider. The branching fractions of hc→γη′ and hc→γη are measured to be (1.40±0.11±0.04±0.10)×10−3 and (3.77±0.55±0.13±0.26)×10−4, respectively, where the first uncertainties are statistical, the second systematic, and the third from the branching fraction of ψ(3686)→π0hc. The ratio Rhc=B(hc→γη)B(hc→γη′) is calculated to be (27.0±4.4±1.0)%. The measurements are consistent with the previous results with improved precision by a factor of 2. The results are valuable for gaining a deeper understanding of η−η′ mixing, and its manifestation within quantum chromodynamics. No significant signal is found for the decay hc→γπ0, and an upper limit is placed on its branching fraction of B(hc→γπ0)<5.0×10−5, at the 90\% confidence level.
The processes hc→γP(P=η′, η, π0) are studied with a sample of (27.12±0.14)×108 ψ(3686) events collected by the BESIII detector at the BEPCII collider. The decay hc→γη is observed for the first time with the significance of 9.0σ, and the branching fraction is determined to be (3.77±0.55±0.13±0.26)×10−4, while B(hc→γη′) is measured to be (1.40±0.11±0.04±0.10)×10−3, where the first uncertainties are statistical, the second systematic, and the third from the branching fraction of ψ(3686)→π0hc. The combination of these results allows for a precise determination of Rhc=B(hc→γη)B(hc→γη′), which is calculated to be (27.0±4.4±1.0)%. The results are valuable for gaining a deeper understanding of η−η′ mixing, and its manifestation within quantum chromodynamics. No significant signal is found for the decay hc→γπ0, and an upper limit is placed on its branching fraction of B(hc→γπ0)<5.0×10−5, at the 90% confidence level.
Observation of χcJ → 3(K⁺K⁻)
(2024)
By analyzing (27.12±0.14)×108 𝜓(3686) events collected with the BESIII detector operating at the BEPCII collider, the decay processes 𝜒𝑐𝐽→3(𝐾+𝐾−) (𝐽=0, 1, 2) are observed for the first time with statistical significances of 8.2𝜎, 8.1𝜎, and 12.4𝜎, respectively. The product branching fractions of 𝜓(3686)→𝛾𝜒𝑐𝐽, 𝜒𝑐𝐽→3(𝐾+𝐾−) are presented and the branching fractions of 𝜒𝑐𝐽→3(𝐾+𝐾−) decays are determined to be ℬ𝜒𝑐0→3(𝐾+𝐾−)=(10.7±1.8±1.1)×10−6, ℬ𝜒𝑐1→3(𝐾+𝐾−)=(4.2±0.9±0.5)×10−6, and ℬ𝜒𝑐2→3(𝐾+𝐾−)=(7.2±1.1±0.8)×10−6, where the first uncertainties are statistical and the second are systematic.
The CP-even fractions (F+) of the decays D0→π+π−π0 and D0→K+K−π0 are measured with a quantum-correlated ψ(3770)→DD¯ data sample collected by the BESIII experiment corresponding to an integrated luminosity of 7.93 fb−1. The results are Fπ+π−π0+=0.9406±0.0036±0.0021 and FK+K−π0+=0.631±0.014±0.011, where the first uncertainties are statistical and the second systematic. These measurements are consistent with the previous determinations, and the uncertainties for Fπ+π−π0+ and FK+K−π0+ are reduced by factors of 3.9 and 2.6, respectively. The reported results provide important inputs for the precise measurement of the angle γ of the Cabibbo-Kobayashi-Maskawa matrix and indirect CP violation in charm mixing.
Model-independent determination of the strong-phase difference between D⁰ and D̄⁰ → π⁺π⁻π⁺π⁻ decays
(2024)
Measurements of the strong-phase difference between D0 and D¯0→π+π−π+π− are performed in bins of phase space. The study exploits a sample of quantum-correlated DD¯ mesons collected by the BESIII experiment in e+e− collisions at a center-of-mass energy of 3.773~GeV, corresponding to an integrated luminosity of 2.93~fb−1. Here, D denotes a neutral charm meson in a superposition of flavor eigenstates. The reported results are valuable for measurements of the CP-violating phase γ (also denoted ϕ3) in B±→DK±, D→π+π−π+π− decays, and the binning schemes are designed to provide good statistical sensitivity to this parameter. The expected uncertainty on γ arising from the precision of the strong-phase measurements, when applied to very large samples of B-meson decays, is around 1.5∘ or 2∘, depending on the binning scheme. The binned strong-phase parameters are combined to give a value of F4π+=0.746±0.010±0.004 for the CP-even fraction of D0→π+π−π+π− decays, which is around 30\% more precise than the previous best measurement of this quantity.
Using 7.93 fb−1 of e+e− collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, we measure the absolute branching fractions of D0→K−e+νe, D0→K−μ+νμ, D+→K¯0e+νe, and D+→K¯0μ+νμ to be (3.509±0.009stat.±0.013syst.)%, (3.408±0.011stat.±0.013syst.)%, (8.856±0.039stat.±0.078syst.)%, and (8.661±0.046stat.±0.080syst.)%, respectively. By performing a simultaneous fit to the partial decay rates of these four decays, the product of the hadronic form factor fK+(0) and the modulus of the c→s CKM matrix element |Vcs| is determined to be fK+(0)|Vcs|=0.7162±0.0011stat.±0.0012syst.. Taking the value of |Vcs|=0.97349±0.00016 from the standard model global fit or that of fK+(0)=0.7452±0.0031 from the LQCD calculation as input, we derive the results fK+(0)=0.7357±0.0011stat.±0.0012syst. and |Vcs|=0.9611±0.0015stat.±0.0016syst.±0.0040LQCD.
The e+e−→D+sDs1(2536)− and e+e−→D+sD∗s2(2573)− processes are studied using data samples collected with the BESIII detector at center-of-mass energies from 4.530 to 4.946~GeV. The absolute branching fractions of Ds1(2536)−→D¯∗0K− and D∗s2(2573)−→D¯0K− are measured for the first time to be (35.9±4.8±3.5)% and (37.4±3.1±4.6)%, respectively. The measurements are in tension with predictions based on the assumption that the Ds1(2536) and D∗s2(2573) are dominated by a bare cs¯ component. The e+e−→D+sDs1(2536)− and e+e−→D+sD∗s2(2573)− cross sections are measured, and a resonant structure at around 4.6~GeV with a width of 50~MeV is observed for the first time with a statistical significance of 15σ in the e+e−→D+sD∗s2(2573)− process. It could be the Y(4626) found by the Belle collaboration in the D+sDs1(2536)− final state, since they have similar masses and widths. There is also evidence for a structure at around 4.75~GeV in both processes.