Refine
Year of publication
Document Type
- Preprint (621)
- Article (515)
- Part of Periodical (3)
Language
- English (1139)
Has Fulltext
- yes (1139)
Is part of the Bibliography
- no (1139)
Keywords
- BESIII (17)
- Heavy Ion Experiments (13)
- e +-e − Experiments (12)
- Hadron-Hadron Scattering (11)
- Branching fraction (9)
- Particle and Resonance Production (8)
- LHC (7)
- Quarkonium (6)
- Hadronic decays (5)
- Spectroscopy (5)
- Branching fractions (4)
- Charm Physics (4)
- Charm physics (4)
- Collective Flow (4)
- Jets (4)
- Lepton colliders (4)
- Polarization (4)
- QCD (4)
- Quark-Gluon Plasma (4)
- taxonomy (4)
- ALICE experiment (3)
- Charmed mesons (3)
- Charmonium (3)
- China (3)
- Elastic scattering (3)
- Electroweak interaction (3)
- Exotics (3)
- Experimental nuclear physics (3)
- Experimental particle physics (3)
- Hadron-Hadron scattering (experiments) (3)
- Heavy Ions (3)
- Heavy Quark Production (3)
- Heavy-ion collision (3)
- Heavy-ion collisions (3)
- Initial state radiation (3)
- Jets and Jet Substructure (3)
- e+-e− Experiments (3)
- ALICE (2)
- Bhabha (2)
- Collectivity (2)
- Correlation (2)
- Cross section (2)
- Diffraction (2)
- Electroweak Interaction (2)
- Elliptic flow (2)
- Genetics (2)
- Hadronic cross section (2)
- Leptonic, semileptonic & radiative decays (2)
- Muon anomaly (2)
- Particle Correlations and Fluctuations (2)
- Particle decays (2)
- Pb–Pb collisions (2)
- Pion form factor (2)
- RHIC (2)
- Relativistic heavy-ion collisions (2)
- Shear viscosity (2)
- fixed-links modeling (2)
- minerals (2)
- morphology (2)
- new species (2)
- pp collisions (2)
- 900 GeV (1)
- ADHD (1)
- ALICE detector (1)
- Absolute branching fraction (1)
- Alleles (1)
- Angular distribution (1)
- Annihilation (1)
- Anti-nuclei (1)
- Aortic valve (1)
- Apoptosis (1)
- B-slope (1)
- BESIII detector (1)
- Beauty production (1)
- Bipolar disorder (1)
- Boosted Jets (1)
- Born cross section measurement (1)
- Brain (1)
- C. gorohovi Sivec & Stark, 2010 (1)
- CD4+ T lymphocytes (1)
- CP violation (1)
- Calliopiidae (1)
- Cell proliferation (1)
- Centrality Class (1)
- Centrality Selection (1)
- Charged-particle multiplicity (1)
- Charm quark spatial diffusion coefficient (1)
- Charmonia (1)
- Charmonium (-like) (1)
- Chilocorini (1)
- Chinoperla changjiangensis sp. nov. (1)
- Coalescence (1)
- Cold nuclear matter effects (1)
- Collective Flow, (1)
- Colony stimulating factor 1 receptor (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)
- Datong coalfield (1)
- Depression (1)
- Deuteron (1)
- Deuteron production (1)
- Di-hadron correlations (1)
- Diagnosis (1)
- D⁰ meson (1)
- Early Permian (1)
- Electromagnetic amplitude (1)
- Electromagnetic form factor (1)
- Electromagnetic form factors (1)
- Electron-pion identification (1)
- Endothelial cells (1)
- FOS: Physical sciences (1)
- Femtoscopy (1)
- Fibre/foam sandwich radiator (1)
- Flavor changing neutral currents (1)
- Flavor symmetries (1)
- Flavour Physics (1)
- Flow (1)
- Form factors (1)
- Groomed jet radius (1)
- HBT (1)
- Hadron production (1)
- Hadron-Hadron Scattering Heavy (1)
- Hadron-hadron interactions (1)
- Hadronic potential (1)
- Hadronization (1)
- Hadrons (1)
- Hard Scattering (1)
- Heart (1)
- Heavy Ion Experiment (1)
- Heavy flavour production (1)
- Heavy ion collisions (1)
- Heavy ions (1)
- Heavy-Ion Collision (1)
- Heavy-flavor decay electron (1)
- Heavy-flavour decay muons (1)
- Heavy-flavour production (1)
- Heavy-ion (1)
- Hematoma (1)
- High Energy Physics - Experiment (hep-ex) (1)
- Higher moments (1)
- Homeostasis (1)
- Hubei (1)
- Hunan (1)
- Hydrodynamic models (1)
- Hyperons (1)
- Immunostaining (1)
- Inclusive branching fraction (1)
- Inclusive spectra (1)
- Inflammation (1)
- Intensity interferometry (1)
- Interference fragmentation function (1)
- Intermittency (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)
- Kollision (1)
- Korrelation (1)
- Lady beetles (1)
- Lepton-Nucleon Scattering (experiments) (1)
- Material budget (1)
- Microglia (1)
- Minimum Bias (1)
- Monte Carlo (1)
- Multi-Parton Interactions (1)
- Multi-wire proportional drift chamber (1)
- Multiple parton interactions (1)
- Net-charge correlations (1)
- Net-charge fluctuations (1)
- Neural network (1)
- Neuroscience (1)
- Neutrinos (1)
- Nonflow (1)
- Nuclear interactions (1)
- Nuclear modification factor (1)
- Oriental region (1)
- Outcome (1)
- PYTHIA (1)
- Particle and resonance production (1)
- Particle correlations and fluctuations (1)
- Particle phenomena (1)
- Pb–Pb (1)
- Phagocytosis (1)
- Phase (1)
- Pingshuo mining district (1)
- Production Cross Section (1)
- Properties of Hadrons (1)
- Proton (1)
- Proton number fluctuations (1)
- Proton-proton collisions (1)
- Proton–proton collisions (1)
- Quantum chromodynamics (1)
- Quantum field theory (1)
- Quark Deconfinement (1)
- Quark Gluon Plasma (1)
- Quark Production (1)
- Quark gluon plasma (1)
- Quark-gluon plasma (1)
- R value (1)
- RNAseq (1)
- Radiative decay (1)
- Raphidophora (1)
- Rapidity Range (1)
- Rare decays (1)
- Relativistic heavy ion physics (1)
- Relativistic kinetic theory (1)
- Resolution Parameter (1)
- Rhaphidophorinae (1)
- SNP (1)
- STAR (1)
- Semi-leptonic decays (1)
- Sex (1)
- Single electrons (1)
- Single muons (1)
- SoftDrop (1)
- Spin alignment (1)
- Spin distribution and correlation (1)
- Splitting function (1)
- Strong amplitude (1)
- Synapse (1)
- Systematic Uncertainty (1)
- TR (1)
- Techniques Electromagnetic calorimeters (1)
- Therapy (1)
- Thermal model (1)
- Time Projection Chamber (1)
- Tracking (1)
- Transition radiation detector (1)
- Transport model (1)
- Transverse momentum (1)
- Transversity (1)
- Traumatic brain injury (1)
- Treatment (1)
- Trigger (1)
- Triple quarkonia (1)
- Vector Boson Production (1)
- Vorticity (1)
- W-exchange (1)
- Xenon-based gas mixture (1)
- Y (4260) (1)
- Y states (1)
- apoptosis (1)
- barnacle (1)
- branching fractions (1)
- caspase (1)
- center-of-mass energy (1)
- charmed baryon (1)
- charmonium-like states (1)
- chemotherapy (1)
- chronic kidney disease (1)
- coal (1)
- collision (1)
- dE/dx (1)
- decay (1)
- decays (1)
- deep sea (1)
- detector (1)
- deuteron (1)
- diabetic nephropathy (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)
- enrichment factor (1)
- executive processes (1)
- experimental results (1)
- felsic detrital (1)
- fluid intelligence (1)
- fluid reasoning (1)
- hadron spectroscopy (1)
- hadronic events (1)
- harmful elements (1)
- heavy ion experiments (1)
- helicity amplitude analysis (1)
- high energie (1)
- high-fat-diet (1)
- hohe Energie (1)
- hydrothermal fluids (1)
- hydroxysafflor yellow A (1)
- identification key (1)
- inclusive J/ψ decays (1)
- jumping spider (1)
- key to species (1)
- leptin receptor-deficient mouse (1)
- leukopenia (1)
- lithium (1)
- liver (1)
- luminosity (1)
- lungs (1)
- metabolomics (1)
- neutropenia (1)
- new genus (1)
- number of J/ψ events (1)
- occurrence state (1)
- p+p collisions (1)
- peat environment (1)
- polymorphism (1)
- prediabetes and type 2 diabetes (1)
- prepotent response inhibition (1)
- quark gluon plasma (1)
- reduced kidney function (1)
- seawater influence (1)
- sepsis (1)
- space-momentum correlation (1)
- synomyny (1)
- terrigenous (1)
- tetraquark (1)
- trace elements (1)
- trigger efficiency (1)
- working memory (1)
- working memory capacity (1)
- world checklist (1)
- Λ+c baryon (1)
- Λc⁺ (1)
- Σ hyperon (1)
- ψ(3686) (1)
- √sN N = 2.76 TeV (1)
Institute
- Physik (1071)
- Frankfurt Institute for Advanced Studies (FIAS) (755)
- Informatik (688)
- Medizin (12)
- Geowissenschaften (3)
- Informatik und Mathematik (3)
- Hochschulrechenzentrum (2)
- Psychologie (2)
- Biochemie, Chemie und Pharmazie (1)
- Geowissenschaften / Geographie (1)
We report on the production of inclusive Υ(1S) and Υ(2S) in p-Pb collisions at sNN−−−√=5.02 TeV at the LHC. The measurement is performed with the ALICE detector at backward (−4.46<ycms<−2.96) and forward (2.03<ycms<3.53) rapidity down to zero transverse momentum. The production cross sections of the Υ(1S) and Υ(2S) are presented, as well as the nuclear modification factor and the ratio of the forward to backward yields of Υ(1S). A suppression of the inclusive Υ(1S) yield in p-Pb collisions with respect to the yield from pp collisions scaled by the number of binary nucleon-nucleon collisions is observed at forward rapidity but not at backward rapidity. The results are compared to theoretical model calculations including nuclear shadowing or partonic energy loss effects.
The pT-differential production cross section of electrons from semileptonic decays of heavy-flavor hadrons has been measured at mid-rapidity in proton-proton collisions at s√=2.76 TeV in the transverse momentum range 0.5 < pT < 12 GeV/c with the ALICE detector at the LHC. The analysis was performed using minimum bias events and events triggered by the electromagnetic calorimeter. Predictions from perturbative QCD calculations agree with the data within the theoretical and experimental uncertainties.
The differential charged jet cross sections, jet fragmentation distributions, and jet shapes are measured in minimum bias proton-proton collisions at centre-of-mass energy s√=7 TeV using the ALICE detector at the LHC. Jets are reconstructed from charged particle momenta in the mid-rapidity region using the sequential recombination kT and anti-kT as well as the SISCone jet finding algorithms with several resolution parameters in the range R=0.2 to 0.6. Differential jet production cross sections measured with the three jet finders are in agreement in the transverse momentum (pT) interval 20<pjet,chT<100 GeV/c. They are also consistent with prior measurements carried out at the LHC by the ATLAS collaboration. The jet charged particle multiplicity rises monotonically with increasing jet pT, in qualitative agreement with prior observations at lower energies. The transverse profiles of leading jets are investigated using radial momentum density distributions as well as distributions of the average radius containing 80% (⟨R80⟩) of the reconstructed jet pT. The fragmentation of leading jets with R=0.4 using scaled pT spectra of the jet constituents is studied. The measurements are compared to model calculations from event generators (PYTHIA, PHOJET, HERWIG). The measured radial density distributions and ⟨R80⟩ distributions are well described by the PYTHIA model (tune Perugia-2011). The fragmentation distributions are better described by HERWIG.
Results on the production of 4He and Image 1 nuclei in Pb–Pb collisions at √sNN=2.76TeV in the rapidity range |y|<1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0–10% central events are found to be dN/dyHe4=(0.8±0.4(stat)±0.3(syst))×10−6 and Image 2, respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (Tchem=156MeV) as for light hadrons. The measured ratio of Image 3 is 1.4±0.8(stat)±0.5(syst).
In ultrarelativistic heavy-ion collisions, the event-by-event variation of the elliptic flow v2 reflects fluctuations in the shape of the initial state of the system. This allows to select events with the same centrality but different initial geometry. This selection technique, Event Shape Engineering, has been used in the analysis of charge-dependent two- and three-particle correlations in Pb–Pb collisions at √sNN=2.76 TeV. The two-particle correlator 〈cos(φα−φβ)〉, calculated for different combinations of charges α and β, is almost independent of v2 (for a given centrality), while the three-particle correlator 〈cos(φα+φβ−2Ψ2)〉 scales almost linearly both with the event v2 and charged-particle pseudorapidity density. The charge dependence of the three-particle correlator is often interpreted as evidence for the Chiral Magnetic Effect (CME), a parity violating effect of the strong interaction. However, its measured dependence on v2 points to a large non-CME contribution to the correlator. Comparing the results with Monte Carlo calculations including a magnetic field due to the spectators, the upper limit of the CME signal contribution to the three-particle correlator in the 10–50% centrality interval is found to be 26–33% at 95% confidence level.
We compute the fermion spin distribution in the vortical fluid created in off-central high energy heavy-ion collisions. We employ the event-by-event (3+1)D viscous hydrodynamic model. The spin polarization density is proportional to the local fluid vorticity in quantum kinetic theory. As a result of strong collectivity, the spatial distribution of the local vorticity on the freeze-out hyper-surface strongly correlates to the rapidity and azimuthal angle distribution of fermion spins. We investigate the sensitivity of the local polarization to the initial fluid velocity in the hydrodynamic model and compute the global polarization of Λ hyperons by the AMPT model. The energy dependence of the global polarization agrees with the STAR data.
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.
We present a measurement of azimuthal correlations between inclusive J/ψ and charged hadrons in p–Pb collisions recorded with the ALICE detector at the CERN LHC. The J/ψ are reconstructed at forward (p-going, 2.03<y<3.53) and backward (Pb-going, −4.46<y<−2.96) rapidity via their μ+μ− decay channel, while the charged hadrons are reconstructed at mid-rapidity (|η|<1.8). The correlations are expressed in terms of associated charged-hadron yields per J/ψ trigger. A rapidity gap of at least 1.5 units is required between the trigger J/ψ and the associated charged hadrons. Possible correlations due to collective effects are assessed by subtracting the associated per-trigger yields in the low-multiplicity collisions from those in the high-multiplicity collisions. After the subtraction, we observe a strong indication of remaining symmetric structures at Δφ≈0 and Δφ≈π, similar to those previously found in two-particle correlations at middle and forward rapidity. The corresponding second-order Fourier coefficient (v2) in the transverse momentum interval between 3 and 6 GeV/c is found to be positive with a significance of about 5σ. The obtained results are similar to the J/ψ v2 coefficients measured in Pb–Pb collisions at sNN=5.02 TeV, suggesting a common mechanism at the origin of the J/ψ v2.
Two-pion correlation functions in Au+Au collisions at sqrt[sNN] = 130 GeV have been measured by the STAR (solenoidal tracker at RHIC) detector. The source size extracted by fitting the correlations grows with event multiplicity and decreases with transverse momentum. Anomalously large sizes or emission durations, which have been suggested as signals of quark-gluon plasma formation and rehadronization, are not observed. The Hanbury Brown-Twiss parameters display a weak energy dependence over a broad range in sqrt[sNN].
The first measurements of light antinucleus production in Au+Au collisions at the Relativistic Heavy-Ion Collider are reported. The observed production rates for d-bar and 3He-bar are much larger than in lower energy nucleus-nucleus collisions. A coalescence model analysis of the yields indicates that there is little or no increase in the antinucleon freeze-out volume compared to collisions at CERN SPS energy. These analyses also indicate that the 3He-bar freeze-out volume is smaller than the d-bar freeze-out volume.
We present the first measurement of midrapidity vector meson phi production in Au+Au collisions at RHIC (sqrt[sNN]=130 GeV) from the STAR detector. For the 11% highest multiplicity collisions, the slope parameter from an exponential fit to the transverse mass distribution is T=379±50(stat)±45(syst) MeV, the yield dN/dy=5.73±0.37(stat)±0.69(syst) per event, and the ratio N phi /Nh- is found to be 0.021±0.001(stat)±0.004(syst). The measured ratio N phi /Nh- and T for the phi meson at midrapidity do not change for the selected multiplicity bins.
Background and Aim. Spontaneous bacterial peritonitis (SBP) is one of the most common complications of liver cirrhosis. Antibiotics are the main treatment regimen of SBP. Traditional Chinese medicine Xuebijing injection has been used in such patients. Our study aimed to overview the efficacy of Xuebijing injection combined with antibiotics for the treatment of SBP.
Method. We searched the PubMed, Embase, China National Knowledge Infrastructure, VIP, and Wanfang databases. The search items included "Xuebijing", "peritonitis", "liver cirrhosis", and "random" to identify all relevant randomized controlled trials (RCTs). The Cochrane risk of bias tool was used to assess the study quality. The odd ratios (ORs) with 95% confidence intervals (CIs) were calculated by using a random-effect model. Heterogeneity was also calculated.
Results. A total of 9 RCTs were included. The study quality was unsatisfied. The overall (OR = 2.95, 95% CI = 1.97–4.42, p<0.00001) and complete (OR = 2.18, 95% CI = 1.57–3.04, p<0.00001) responses were significantly higher in the Xuebijing injection combined with antibiotics group than the antibiotics alone group. The incidence of cirrhosis related complications, including hepatic encephalopathy and hepatorenal syndrome, was lower in the Xuebijing injection combined with antibiotics group than the antibiotics alone group. No significant heterogeneity was observed among studies.
Conclusion. Additional use of Xuebijing injection may improve the efficacy of antibiotics for the treatment of SBP in liver cirrhosis. However, due to a low level of current evidence, we did not establish any recommendation regarding the use of Xuebijing injection for the treatment of SBP.
We report first results on elliptic flow of identified particles at midrapidity in Au+Au collisions at sqrt[sNN] = 130 GeV using the STAR TPC at RHIC. The elliptic flow as a function of transverse momentum and centrality differs significantly for particles of different masses. This dependence can be accounted for in hydrodynamic models, indicating that the system created shows a behavior consistent with collective hydrodynamical flow. The fit to the data with a simple model gives information on the temperature and flow velocities at freeze-out.
The minimum-bias multiplicity distribution and the transverse momentum and pseudorapidity distributions for central collisions have been measured for negative hadrons ( h-) in Au+Au interactions at sqrt[sNN] = 130 GeV. The multiplicity density at midrapidity for the 5% most central interactions is dNh-/d eta | eta = 0 = 280±1(stat)±20(syst), an increase per participant of 38% relative to pp-bar collisions at the same energy. The mean transverse momentum is 0.508±0.012 GeV/c and is larger than in central Pb+Pb collisions at lower energies. The scaling of the h- yield per participant is a strong function of pperp. The pseudorapidity distribution is almost constant within | eta |<1.
We report results on the ratio of midrapidity antiproton-to-proton yields in Au+Au collisions at sqrt[sNN] = 130 GeV per nucleon pair as measured by the STAR experiment at RHIC. Within the rapidity and transverse momentum range of | y|<0.5 and 0.4<pt<1.0 GeV/c, the ratio is essentially independent of either transverse momentum or rapidity, with an average of 0.65±0.01(stat)±0.07(syst) for minimum bias collisions. Within errors, no strong centrality dependence is observed. The results indicate that at this RHIC energy, although the p-p-bar pair production becomes important at midrapidity, a significant excess of baryons over antibaryons is still present.
Charged-particle pseudorapidity density at mid-rapidity in p-Pb collisions at √sNN = 8.16 TeV
(2019)
The pseudorapidity density of charged particles, dNch/dη, in p–Pb collisions has been measured at a centre-of-mass energy per nucleon–nucleon pair of sNN−−−√ = 8.16 TeV at mid-pseudorapidity for non-single-diffractive events. The results cover 3.6 units of pseudorapidity, |η|<1.8. The dNch/dη value is 19.1±0.7 at |η|<0.5. This quantity divided by ⟨Npart⟩ / 2 is 4.73±0.20, where ⟨Npart⟩is the average number of participating nucleons, is 9.5% higher than the corresponding value for p–Pb collisions at sNN−−−√ = 5.02 TeV. Measurements are compared with models based on different mechanisms for particle production. All models agree within uncertainties with data in the Pb-going side, while HIJING overestimates, showing a symmetric behaviour, and EPOS underestimates the p-going side of the dNch/dη distribution. Saturation-based models reproduce the distributions well for η>−1.3. The dNch/dη is also measured for different centrality estimators, based both on the charged-particle multiplicity and on the energy deposited in the Zero-Degree Calorimeters. A study of the implications of the large multiplicity fluctuations due to the small number of participants for systems like p–Pb in the centrality calculation for multiplicity-based estimators is discussed, demonstrating the advantages of determining the centrality with energy deposited near beam rapidity.
A measurement of the production of prompt +c baryons in Pb–Pb collisions at √sNN = 5.02 TeV with the ALICE detector at the LHC is reported. The +c and − c were reconstructed at midrapidity (|y| < 0.5) via the hadronic decay channel +c → pK0 S (and charge conjugate) in the transverse momentum and centrality intervals 6 < pT < 12 GeV/c and 0–80%. The +c /D0 ratio, which is sensitive to the charm quark hadronisation mechanisms in the medium, is measured and found to be larger than the ratio measured in minimum-bias pp collisions at √s = 7 TeV and in p–Pb collisions at √sNN = 5.02 TeV. In particular, the values in p–Pb and Pb–Pb collisions differ by about two standard deviations of the combined statistical and systematic uncertainties in the common pT interval covered by the measurements in the two collision systems. The + c /D0 ratio is also compared with model calculations including different implementations of charm quark hadronisation. The measured ratio is reproduced by models implementing a pure coalescence scenario, while adding a fragmentation contribution leads to an underestimation. The + c nuclear modification factor, RAA, is also presented. The measured values of the RAA of + c , D+ s and non-strange D mesons are compatible within the combined statistical and systematic uncertainties. They show, however, a hint of a hierarchy (RD0 AA < RD+ s AA < R+ c AA ), conceivable with a contribution from coalescence mechanisms to charm hadron formation in the medium.
The production yield of prompt D mesons and their elliptic flow coefficient v2 were measured with the Event-Shape Engineering (ESE) technique applied to mid-central (10–30% and 30–50% centrality classes) Pb-Pb collisions at the centre-of-mass energy per nucleon pair sNN−−−√=5.02 TeV, with the ALICE detector at the LHC. The ESE technique allows the classification of events, belonging to the same centrality, according to the azimuthal anisotropy of soft particle production in the collision. The reported measurements give the opportunity to investigate the dynamics of charm quarks in the Quark-Gluon Plasma and provide information on their participation in the collective expansion of the medium. D mesons were reconstructed via their hadronic decays at mid-rapidity, |η| < 0.8, in the transverse momentum interval 1 < pT < 24 GeV/c. The v2 coefficient is found to be sensitive to the event-shape selection confirming a correlation between the D-meson azimuthal anisotropy and the collective expansion of the bulk matter, while the per-event D-meson yields do not show any significant modification within the current uncertainties.
The ALICE Collaboration has measured the energy dependence of exclusive photoproduction of J/ψ vector mesons off proton targets in ultra–peripheral p–Pb collisions at a centre-of-mass energy per nucleon pair sNN−−−√=5.02 TeV. The e+e− and μ+μ− decay channels are used to measure the cross section as a function of the rapidity of the J/ψ in the range −2.5<y<2.7, corresponding to an energy in the γp centre-of-mass in the interval 40<Wγp<550 GeV. The measurements, which are consistent with a power law dependence of the exclusive J/ψ photoproduction cross section, are compared to previous results from HERA and the LHC and to several theoretical models. They are found to be compatible with previous measurements.