Refine
Year of publication
- 2022 (141) (remove)
Document Type
- Article (141) (remove)
Language
- English (141)
Has Fulltext
- yes (141)
Is part of the Bibliography
- no (141)
Keywords
- Branching fraction (4)
- e +-e − Experiments (4)
- Experimental nuclear physics (3)
- Experimental particle physics (3)
- Heavy Ion Experiments (3)
- Charmed mesons (2)
- Electroweak interaction (2)
- Hadron-hadron interactions (2)
- Lepton colliders (2)
- Particle and Resonance Production (2)
- Quarkonium (2)
- Relativistic heavy-ion collisions (2)
- 2 + 1-dimensional field theories (1)
- AGN host galaxies (1)
- Activation (1)
- Alternating Phase Focusing (1)
- BESIII (1)
- BESIII detector (1)
- Beam dynamics simulation (1)
- Beta decay (1)
- Biological sciences (1)
- Black holes (1)
- CNC manufacturing (1)
- CP violation (1)
- CVD (1)
- Charm Physics (1)
- Charm physics (1)
- Chiral Lagrangian (1)
- Cold nuclear matter effects (1)
- Collision processes (1)
- Continuous wave (1)
- Electromagnetic transitions (1)
- Electronic properties and materials (1)
- Elsevier (1)
- Equation of State (1)
- Equation of state (1)
- Exotics (1)
- Experimental testing (1)
- FEBID (1)
- Finite element simulations (1)
- Flavor changing neutral currents (1)
- Flavor symmetries (1)
- Fluctuations (1)
- Gamma intensity (1)
- Gravitational wave events (1)
- Gross-Neveu model (1)
- Guided waves (1)
- Hadron-Hadron Scattering (1)
- Hadronic decays (1)
- Heavy Quark Production (1)
- Heavy ion (1)
- Heavy-ion collision (1)
- Hybrid mesons (1)
- Hyperonic stars (1)
- Immunology (1)
- Interstellar molecules (1)
- Irregular plate with non-uniform thickness (1)
- J/ψ suppression (1)
- Jets (1)
- Josephson junction arrays (1)
- LaTeX (1)
- Laser-produced plasmas (1)
- Lepton-Nucleon Scattering (experiments) (1)
- Leptonic, semileptonic & radiative decays (1)
- Linear accelerator (1)
- Linear response (1)
- Longitudinal and transverse electric fields (1)
- Mathematical biosciences (1)
- Meson decays (1)
- Minimal length (1)
- Models & methods for nuclear reactions (1)
- Molecular clouds (1)
- Molecule destruction (1)
- Molecule formation (1)
- NbC (1)
- Neuroscience (1)
- Neutrinos (1)
- Neutron physics (1)
- Noise spectra (1)
- Non-Canonical Amino Acids (1)
- Nonlinear beam dynamics (1)
- Nuclear reactions (1)
- Nyquist noise (1)
- Particle & resonance production (1)
- Photon number noise (1)
- Plasma-based accelerators (1)
- Protein Dynamics (1)
- Protein Modifications (1)
- QCD (1)
- QED (1)
- Quantum gravity (1)
- Quark Gluon Plasma (1)
- RHIC (1)
- Radiative capture (1)
- Radio continuum emission (1)
- Radio jets (1)
- Rapid rotation (1)
- Rare decays (1)
- Resonance reactions (1)
- Resonances (1)
- SMASH (1)
- Spectroscopy (1)
- Supermassive black holes (1)
- Template (1)
- Thermal & statistical models (1)
- Time Projection Chamber (TPC) (1)
- Time-Resolved Spectroscopy (1)
- Topological insulators (1)
- Very long baseline interferometry (1)
- Vibrational Energy Transfer (1)
- Zr (1)
- chiral imbalance (1)
- crowd behaviour (1)
- deep learning (1)
- direct-write fabrications (1)
- disorder (1)
- electrical transport characteristics (1)
- electron-lattice coupling (1)
- electron-positron collision (1)
- elsarticle.cls (1)
- equation of state (1)
- evacuation (1)
- event pileup (1)
- focused ion beam induced depositions (1)
- hadron spectroscopy (1)
- heavy-ion (1)
- heavy-ion collisions; (1)
- heavy-ion storage rings (1)
- helium-beam radiography (1)
- hypernuclear (1)
- hyperons (1)
- inclusive J/ψ decays (1)
- inhomogeneous phases (1)
- interactive visualization (1)
- intra-dimer charge and spin degrees of freedom (1)
- inverse kinematics (1)
- ion-beam therapy (1)
- isospin imbalance (1)
- kagome lattices (1)
- magnetic exchange beyond Heisenberg (1)
- magnetic frustration (1)
- manganese (1)
- many-electron correlation (1)
- mean-field (1)
- metal carbonyl (1)
- multi-center magnons (1)
- multi-messenger (1)
- nanolithography (1)
- neutron stars (1)
- neutron-induced reactions (1)
- nuclear (1)
- number of J/ψ events (1)
- on imaging (1)
- one-photon double ionization (1)
- organic charge-transfer salts (1)
- space charge distortions (1)
- superconductor-to-metal transition (1)
- surrogate reactions (1)
- symmetry energy (1)
- terahertz magnetometry (1)
- terahertz photons (1)
- tetraquark (1)
- tracking (1)
- two-electron systems (1)
- vanadium (1)
Institute
- Physik (141) (remove)
Using a data set corresponding to an integrated luminosity of 6.32 fb−1 recorded by the BESIII detector at center-of-mass energies between 4.178 and 4.226 GeV, an amplitude analysis of the decay D+s → π+π0π0 is performed, and the relative fractions and phases of different intermediate processes are determined. The absolute branching fraction of the decay D+s → π+π0π0 is measured to be (0.50 ± 0.04stat ± 0.02syst)%. Theabsolute branching fraction of the intermediate process D+s → f0(980)π+, f0(980) → π0π0 is determined to be (0.28 ± 0.04stat ± 0.04syst)%.
Using (448.1 ± 2.9) × 106 ψ(3686) events collected with the BESIII detector at the BEPCII collider, the decay ψ(3686) → Σ⁻Σ‾⁺ is observed for the first time with a branching fraction of (2.82 ± 0.04stat. ± 0.08syst.) × 10−4, and the angular parameter αΣ− is measured to be 0.96 ± 0.09stat. ± 0.03syst..
Using a data sample corresponding to an integrated luminosity of 2.93 fb−1 collected at a center-of-mass energy √𝑠=3.773 GeV by the BESIII detector, the decay 𝐷0→𝜔𝜙 is observed for the first time. The branching fraction is measured to be (6.48±0.96±0.40)×10−4 with a significance of 6.3𝜎, where the first and second uncertainties are statistical and systematic, respectively. An angular analysis reveals that the 𝜙 and 𝜔 mesons from the 𝐷0→𝜔𝜙 decay are transversely polarized. The 95% confidence level upper limit on longitudinal polarization fraction is set to be less than 0.24, which is inconsistent with current theoretical expectations and challenges our understanding of the underlying dynamics in charm meson decays.
The singly Cabibbo-suppressed decay D+s → K+π+π−π0 is observed by using a data set corresponding to an integrated luminosity of 6.32 fb−1 recorded by the BESIII detector at the centre-of-mass energies between 4.178 and 4.226 GeV. The first amplitude analysis of D+s → K+π+π−π0 reveals the sub-structures in this decay and determines the fractions and relative phases of different intermediate processes. The dominant intermediate process is D+s → K∗0ρ+, with a fit fraction of (40.5 ± 2.8stat. ± 1.5syst.)%. With the detection efficiency based on our amplitude analysis, the absolute branching fraction forD+s → K+π+π−π0 is measured to be (9.75 ± 0.54stat. ± 0.17syst.) × 10−3.
Using inclusive decays of the J/ψ, a precise determination of the number of J/ψ events collected with the BESIII detector is performed. For the two data sets taken in 2009 and 2012, the numbers of J/ψ events are recalculated to be (224.0±1.3)×106 and (1088.5±4.4)×106 respectively, which are in good agreement with the previous measurements. For the J/ψ sample taken in 2017--2019, the number of events is determined to be (8774.0±39.4)×106. The total number of J/ψ events collected with the BESIII detector is determined to be (10087±44)×106, where the uncertainty is dominated by systematic effects and the statistical uncertainty is negligible.
We report a search for a heavier partner of the recently observed Zcs(3985)− state, denoted as Z′−cs, in the process e+e−→K+D∗−sD∗0+c.c., based on e+e− collision data collected at the center-of-mass energies of s√=4.661, 4.682 and 4.699 GeV with the BESIII detector. The Z′−cs is of interest as it is expected to be a candidate for a hidden-charm and open-strange tetraquark. A partial-reconstruction technique is used to isolate K+ recoil-mass spectra, which are probed for a potential contribution from Z′−cs→D∗−sD∗0 (c.c.). We find an excess of Z′−cs→D∗−sD∗0 (c.c.) candidates with a significance of 2.1σ, after considering systematic uncertainties, at a mass of (4123.5±0.7stat.±4.7syst.) MeV/c2. As the data set is limited in size, the upper limits are evaluated at the 90\% confidence level on the product of the Born cross sections (σBorn) and the branching fraction (B) of Z′−cs→D∗−sD∗0, under different assumptions of the Z′−cs mass from 4.120 to 4.140 MeV and of the width from 10 to 50 MeV at the three center-of-mass energies. The upper limits of σBorn⋅B are found to be at the level of O(1) pb at each energy. Larger data samples are needed to confirm the Z′−cs state and clarify its nature in the coming years.
The integrated luminosities of data samples collected in the BESIII experiment in 2016–2017 at center-of-mass energies between 4.19 and 4.28 GeV are measured with a precision better than 1% by analyzing large-angle Bhabha scattering events. The integrated luminosities of old datasets collected in 2010–2014 are updated by considering corrections related to detector performance, offsetting the effect of newly discovered readout errors in the electromagnetic calorimeter, which can haphazardly occur.
The gas-phase reaction of O + H₃⁺ has two exothermic product channels: OH+ + H2 and H2O+ + H. In the present study, we analyze experimental data from a merged-beams measurement to derive thermal rate coefficients resolved by product channel for the temperature range from 10 to 1000 K. Published astrochemical models either ignore the second product channel or apply a temperature-independent branching ratio of 70% versus 30% for the formation of OH+ + H2 versus H2O+ + H, respectively, which originates from a single experimental data point measured at 295 K. Our results are consistent with this data point, but show a branching ratio that varies with temperature reaching 58% versus 42% at 10 K. We provide recommended rate coefficients for the two product channels for two cases, one where the initial fine-structure population of the O(3PJ) reactant is in its J = 2 ground state and the other one where it is in thermal equilibrium.
We use lattice QCD to investigate the existence of strong-interaction-stable antiheavy-antiheavy-light-light tetraquarks. We study the ¯𝑏¯𝑏𝑢𝑠 system with quantum numbers 𝐽𝑃=1+ as well as the ¯𝑏¯𝑐𝑢𝑑 systems with quantum numbers 𝐼(𝐽𝑃)=0(0+) and 𝐼(𝐽𝑃)=0(1+). We carry out computations on five gauge-link ensembles with 2+1 flavors of domain-wall fermions, including one at the physical pion mass. The bottom quarks are implemented using lattice nonrelativistic QCD, and the charm quarks using an anisotropic clover action. In addition to local diquark-antidiquark and local meson-meson interpolating operators, we include nonlocal meson-meson operators at the sink, which facilitates the reliable determination of the low-lying energy levels. We find clear evidence for the existence of a strong-interaction-stable ¯𝑏¯𝑏𝑢𝑠 tetraquark with binding energy (−86±22±10) MeV and mass (10609±22±10) MeV. For the ¯𝑏¯𝑐𝑢𝑑 systems we do not find any indication for the existence of bound states, but cannot rule out their existence either.
ALICE is the dedicated heavy-ion experiment at the CERN Large Hadron Collider (LHC). Its main tracking and particle-identification detector is a large volume Time Projection Chamber (TPC). The TPC has been designed to perform well in the high-track density environment created in high-energy heavy-ion collisions. In this proceeding, we describe the track reconstruction procedure in ALICE. In particular, we focus on the two main challenges that were faced during the Run 2 data-taking period (2015–2018) of the LHC, which were the baseline fluctuations and the local space charge distortions in the TPC. We present the corresponding solutions in detail and describe the software tools that allowed us to circumvent these challenges.