Refine
Year of publication
Language
- English (356)
Has Fulltext
- yes (356)
Is part of the Bibliography
- no (356)
Keywords
- e +-e − Experiments (16)
- Branching fraction (11)
- BESIII (9)
- Particle and Resonance Production (8)
- Charm Physics (6)
- Quarkonium (6)
- Spectroscopy (6)
- Exotics (4)
- Heavy-ion collisions (4)
- Lepton colliders (4)
- Charmed mesons (3)
- Electroweak interaction (3)
- QCD (3)
- e+-e− Experiments (3)
- Beam Energy Scan (2)
- Charm physics (2)
- Charmonium (2)
- Chiral Magnetic Effect (2)
- Electroweak Interaction (2)
- Flavour Physics (2)
- Hadronic decays (2)
- Initial state radiation (2)
- Leptonic, semileptonic & radiative decays (2)
- Particle decays (2)
- Radiative decay (2)
- ALICE experiment (1)
- B-slope (1)
- BESIII detector (1)
- Beam energy scan (1)
- Beauty production (1)
- Bhabha (1)
- Bipolar disorder (1)
- Born cross section (1)
- Born cross section measurement (1)
- Branching fraction measurement (1)
- Branching fractions (1)
- CP violation (1)
- Charm quark spatial diffusion coefficient (1)
- Charm vector (1)
- Charmonium (-like) (1)
- Chiral magnetic effect (1)
- Circadian (1)
- Coalescence (1)
- Collectivity (1)
- Correlation (1)
- Covariance matrix (1)
- Critical point (1)
- Dark photon (1)
- Dark sector (1)
- Deuteron production (1)
- Diffraction (1)
- Effective form factor (1)
- Elastic scattering (1)
- Electromagnetic form factors (1)
- Elliptic flow (1)
- Experimental nuclear physics (1)
- Experimental particle physics (1)
- FOS: Physical sciences (1)
- Flavor changing neutral currents (1)
- Flavor symmetries (1)
- Form factors (1)
- Hadronic cross section (1)
- Heavy Ion Experiments (1)
- Heavy Ions (1)
- Heavy Quark Production (1)
- Heavy-Ion Collision (1)
- Heavy-flavor decay electron (1)
- Heavy-flavour production (1)
- Helicity amplitude analysis (1)
- High Energy Physics - Experiment (hep-ex) (1)
- Higher moments (1)
- Hyperons (1)
- Invisible decays (1)
- Jets (1)
- LHC (1)
- Muon anomaly (1)
- Neutrinos (1)
- Particle and resonance production (1)
- Particle phenomena (1)
- Pion form factor (1)
- Polarization (1)
- Proton (1)
- Proton–proton collisions (1)
- Psychiatry (1)
- Quantum chromodynamics (1)
- Rare decays (1)
- STAR (1)
- Seasonal variation (1)
- Semi-leptonic decays (1)
- Shear viscosity (1)
- Single electrons (1)
- Solar insolation (1)
- Suicide (1)
- Sunlight (1)
- Techniques Electromagnetic calorimeters (1)
- Thermal model (1)
- Threshold effect (1)
- Y states (1)
- center-of-mass energy (1)
- charmonium-like states (1)
- dimuon (1)
- e+e − annihilation (1)
- e+e⁻ − Experiments (1)
- e+e− Experiments (1)
- electron-positron collision (1)
- hadron spectroscopy (1)
- hadronic events (1)
- heavy-ion collisions (1)
- helicity amplitude analysis (1)
- inclusive J/ψ decays (1)
- number of J/ψ events (1)
- pp collisions (1)
- tetraquark (1)
- trigger efficiency (1)
- Λ+c baryon (1)
- Υ suppression (1)
Institute
- Physik (318)
- Frankfurt Institute for Advanced Studies (FIAS) (43)
- Informatik (7)
- Medizin (1)
We report measurements of the inclusive J/ψ yield and average transverse momentum as a function of charged-particle pseudorapidity density dNch/dη in p–Pb collisions at √sNN = 5.02 TeV with ALICE at the LHC. The observables are normalised to their corresponding averages in non-single diffractive events. An increase of the normalised J/ψ yield with normalised dNch/dη, measured at mid-rapidity, is observed at mid-rapidity and backward rapidity. At forward rapidity, a saturation of the relative yield is observed for high charged-particle multiplicities. The normalised average transverse momentum at forward and backward rapidities increases with multiplicity at low multiplicities and saturates beyond moderate multiplicities. In addition, the forward-to-backward nuclear modification factor ratio is also reported, showing an increasing suppression of J/ψ production at forward rapidity with respect to backward rapidity for increasing charged-particle multiplicity.
We present the first ever measurements of femtoscopic correlations between the K0 S and K± particles. The analysis was performed on the data from Pb–Pb collisions at √sNN = 2.76 TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding via the a0(980) resonance. The extracted kaon source radius and correlation strength parameters for K0 SK− are found to be equal within the experimental uncertainties to those for K0 SK+. Comparing the results of the present study with those from published identical-kaon femtoscopic studies by ALICE, mass and coupling parameters for the a0 resonance are tested. Our results are also compatible with the interpretation of the a0 having a tetraquark structure instead of that of a diquark
First results on the longitudinal asymmetry and its effect on the pseudorapidity distributions in Pb–Pb collisions at √sNN = 2.76 TeV at the Large Hadron Collider are obtained with the ALICE detector. The longitudinal asymmetry arises because of an unequal number of participating nucleons from the two colliding nuclei, and is estimated for each event by measuring the energy in the forward neutron-ZeroDegree-Calorimeters (ZNs). The effect of the longitudinal asymmetry is measured on the pseudorapidity distributions of charged particles in the regions |η| < 0.9, 2.8 < η < 5.1 and −3.7 < η < −1.7 by taking the ratio of the pseudorapidity distributions from events corresponding to different regions of asymmetry. The coefficients of a polynomial fit to the ratio characterise the effect of the asymmetry. A Monte Carlo simulation using a Glauber model for the colliding nuclei is tuned to reproduce the spectrum in the ZNs and provides a relation between the measurable longitudinal asymmetry and the shift in the rapidity (y0) of the participant zone formed by the unequal number of participating nucleons. The dependence of the coefficient of the linear term in the polynomial expansion, c1, on the mean value of y0 is investigated.
This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at sNN=2.76 TeV and sNN=5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the hot Quantum Chromodynamics (QCD) matter created in nuclear collisions at collider energies. Jets are reconstructed from charged particles using the anti-kT jet algorithm and resolution parameter R=0.4. The jets are measured in the pseudorapidity range |ηjet|<0.5 and in three intervals of transverse momentum between 60 GeV/c and 120 GeV/c. The measurement of the jet mass in central Pb–Pb collisions is compared to the jet mass as measured in p–Pb reference collisions, to vacuum event generators, and to models including jet quenching. It is observed that the jet mass in central Pb–Pb collisions is consistent within uncertainties with p–Pb reference measurements. Furthermore, the measured jet mass in Pb–Pb collisions is not reproduced by the quenching models considered in this letter and is found to be consistent with PYTHIA expectations within systematic uncertainties.
The second and the third order anisotropic flow, V2 and V3, are mostly determined by the corresponding initial spatial anisotropy coefficients, ε2 and ε3, in the initial density distribution. In addition to their dependence on the same order initial anisotropy coefficient, higher order anisotropic flow, Vn (n > 3), can also have a significant contribution from lower order initial anisotropy coefficients, which leads to mode-coupling effects. In this Letter we investigate the linear and non-linear modes in higher order anisotropic flow Vn for n = 4, 5, 6 with the ALICE detector at the Large Hadron Collider. The measurements are done for particles in the pseudorapidity range |η| < 0.8 and the transverse momentum range 0.2 < pT < 5.0 GeV/c as a function of collision centrality. The results are compared with theoretical calculations and provide important constraints on the initial conditions, including initial spatial geometry and its fluctuations, as well as the ratio of the shear viscosity to entropy density of the produced system.
In the past two decades, pions created in the high density regions of heavy ion collisions have been predicted to be sensitive at high densities to the symmetry energy term in the nuclear equation of state, a property that is key to our understanding of neutron stars. In a new experiment designed to study the symmetry energy, the multiplicities of negatively and positively charged pions have been measured with high accuracy for central 132Sn+124Sn, 112Sn+124Sn, and 108Sn+112Sn collisions at E/A = 270 MeV with the SπRIT Time Projection Chamber. While individual pion multiplicities are measured to 4% accuracy, those of the charged pion multiplicity ratios are measured to 2% accuracy. We compare these data to predictions from seven major transport models. The calculations reproduce qualitatively the dependence of the multiplicities and their ratios on the total neutron and proton number in the colliding systems. However, the predictions of the transport models from different codes differ too much to allow extraction of reliable constraints on the symmetry energy from the data. This finding may explain previous contradictory conclusions on symmetry energy constraints obtained from pion data in Au+Au system. These new results call for still better understanding of the differences among transport codes, and new observables that are more sensitive to the density dependence of the symmetry energy.