Refine
Year of publication
Document Type
- Preprint (692)
- Article (485)
- Working Paper (3)
- Part of Periodical (1)
Language
- English (1181)
Has Fulltext
- yes (1181)
Is part of the Bibliography
- no (1181)
Keywords
- Heavy Ion Experiments (21)
- Hadron-Hadron Scattering (11)
- Hadron-Hadron scattering (experiments) (11)
- LHC (9)
- Heavy-ion collision (6)
- ALICE experiment (4)
- Collective Flow (4)
- Jets (4)
- Quark-Gluon Plasma (4)
- ALICE (3)
- Elastic scattering (3)
- Heavy Ions (3)
- Heavy Quark Production (3)
- Jets and Jet Substructure (3)
- pp collisions (3)
- ABC Transporter (2)
- Antigen Processing (2)
- Beauty production (2)
- Charm physics (2)
- Cirrhosis (2)
- Collectivity (2)
- Correlation (2)
- Diffraction (2)
- Elliptic flow (2)
- Experimental nuclear physics (2)
- Experimental particle physics (2)
- Heavy-ion collisions (2)
- Lepton-Nucleon Scattering (experiments) (2)
- Particle Correlations and Fluctuations (2)
- Particle and resonance production (2)
- Particle correlations and fluctuations (2)
- Pb–Pb collisions (2)
- Polarization (2)
- Portal veins (2)
- QCD (2)
- Quarkonium (2)
- RHIC (2)
- Shear viscosity (2)
- Single electrons (2)
- portal hypertension (2)
- 900 GeV (1)
- ADGRE1 (1)
- ALICE detector (1)
- ATPases (1)
- Angiogenesis (1)
- Angiography (1)
- Anti-nuclei (1)
- Atomic force microscopy (1)
- B-slope (1)
- Biofluids (1)
- Biogeographical comparisons (1)
- Biomarker (1)
- Bipolar disorder (1)
- Blood (1)
- Blood plasma (1)
- Boosted Jets (1)
- CPT1A (1)
- Cancer (1)
- Cancer genetics (1)
- Cancer genomics (1)
- Centrality Class (1)
- Centrality Selection (1)
- Charged-particle multiplicity (1)
- Charm quark spatial diffusion coefficient (1)
- Charmonia (1)
- Chihuahua (1)
- Chronic hepatitis C (1)
- Climate change adaptation (1)
- Clinical variation (1)
- Coalescence (1)
- Cold nuclear matter effects (1)
- Collective Flow, (1)
- Comparison with QCD (1)
- Critical point (1)
- Cyp46a1 (1)
- Deuteron production (1)
- Di-hadron correlations (1)
- Diagnostic test (1)
- Differential diagnosis (1)
- Dissociative seizures (1)
- Dynamic Capabilities (1)
- EMR1 (1)
- Elderly (1)
- Electron-pion identification (1)
- Electroweak interaction (1)
- Entomology (1)
- Evolutionary biology (1)
- F4/80 (1)
- FOMC (1)
- Federal Reserve (1)
- Femtoscopy (1)
- Fibre/foam sandwich radiator (1)
- Flow (1)
- Forestry (1)
- Frailty (1)
- G protein-coupled receptors (1)
- Geldpolitik (1)
- General practitioners (1)
- Genetics (1)
- Genomic instability (1)
- Geochemistry (1)
- Geschichte 1979-1980 (1)
- Groomed jet radius (1)
- Groundwater (1)
- HBT (1)
- Hadron production (1)
- Hadron-Hadron Scattering Heavy (1)
- Hadron-hadron interactions (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-Ion Collision (1)
- Heavy-flavor decay electron (1)
- Heavy-flavour decay muons (1)
- Heavy-flavour production (1)
- Heavy-ion (1)
- Higher moments (1)
- Hmox1 (1)
- Hydrosocial cycle (1)
- Hypertension (1)
- Immunology (1)
- Inclusive spectra (1)
- Intensity interferometry (1)
- Interference fragmentation function (1)
- Interspecific competition (1)
- Invariant Mass Distribution (1)
- Ionisation energy loss (1)
- Ireb2 (1)
- J/ψ suppression (1)
- Jet Physics (1)
- Jet Substructure (1)
- Jet substructure (1)
- KCGS (1)
- Liver diseases (1)
- MMP14 (1)
- Madrean pine-oak forest (1)
- Major Histocompatibility Complex (MHC) (1)
- Material budget (1)
- Membrane Protein (1)
- Membrane biophysics (1)
- Microalgae (1)
- Mid-rapidity (1)
- Minimum Bias (1)
- Molecular biology (1)
- Molecular medicine (1)
- Monte Carlo (1)
- Multi-Parton Interactions (1)
- Multi-strange baryons (1)
- Multi-wire proportional drift chamber (1)
- Multiple parton interactions (1)
- Multiplex immunoassay (1)
- NAFLD (1)
- NDUFAF8 (1)
- Neural network (1)
- Niche differentiation (1)
- Noncoding RNA (1)
- Nonflow (1)
- Nuclear modification factor (1)
- Oldest-old (1)
- Orbital electron capture (1)
- PYGL (1)
- PYTHIA (1)
- Particle and Resonance Production (1)
- Paul Volcker (1)
- Pb–Pb (1)
- Peptides (1)
- Pgrmc1 (1)
- Phylogenomics (1)
- Platelets (1)
- Population genetics (1)
- Portal hypertension (1)
- Production Cross Section (1)
- Properties of Hadrons (1)
- Prostaglandin (1)
- Proton-proton collisions (1)
- Proton–proton (1)
- Proton–proton collisions (1)
- Quark Deconfinement (1)
- Quark Gluon Plasma (1)
- Quark Production (1)
- Quark gluon plasma (1)
- Rapidity Range (1)
- Reconstitution of Membrane Transporters (1)
- Reform (1)
- Relativistic heavy ion physics (1)
- Relativistic heavy-ion collisions (1)
- Reservoir (1)
- Resolution Parameter (1)
- Resource Acquisition (1)
- Resource competition (1)
- STAR (1)
- SVR (1)
- Safety (1)
- Scorpion (1)
- Serum (1)
- Single muons (1)
- Single particle decay spectroscopy (1)
- Slc11a2 (1)
- Slc25a37 (1)
- SoftDrop (1)
- Spin alignment (1)
- Splitting function (1)
- Status epilepticus (1)
- Systematic Uncertainty (1)
- TGR(mREN2)27 (1)
- TR (1)
- Temporal lobe epilepsy (1)
- Tfrc (1)
- Thermal model (1)
- Thrombosis (1)
- Thromboxane (1)
- Time Projection Chamber (1)
- Tracking (1)
- Transition radiation detector (1)
- Transporter (1)
- Transverse momentum (1)
- Transversity (1)
- Trigger (1)
- Two body weak decay (1)
- USA / Board of Governors of the Federal Reserve System (1)
- Vaejovis mcwesti (1)
- Vaejovis mexicanus group (1)
- Vaejovis montanus (1)
- Vaejovis sierrae (1)
- Vector Boson Production (1)
- Veins (1)
- Venture Capital (1)
- Water chemistry (1)
- Water transport (1)
- Western diet (1)
- White blood cells (1)
- Xenon-based gas mixture (1)
- acute-on-chronic liver failure (ACLF) (1)
- aging (1)
- associative memory (1)
- attention (1)
- beta‐trace protein (1)
- biogeographic legaciese (1)
- biological invasions (1)
- biomarker (1)
- chemogenomic set (1)
- cirrhosis (1)
- complex I deficiency (1)
- cystatin C (1)
- dE/dx (1)
- data science (1)
- decompensated liver cirrhosis (1)
- dementia (1)
- detector (1)
- drug discovery (1)
- druggable genome (1)
- ectosomes (1)
- encoding strategies (1)
- exosomes (1)
- experimental results (1)
- extracellular vesicles (1)
- fMRI (1)
- face-name association task (1)
- forest classification (1)
- forest functional similarity (1)
- functional traits (1)
- genes for longevity (1)
- guidelines (1)
- heavy ion experiments (1)
- immunity (1)
- increased vigour (1)
- inflammation (1)
- interference (1)
- intrinsic vs extrinsic factors (1)
- invasion success (1)
- iron overload versus deprivation (1)
- kinase inhibitor (1)
- lipids (1)
- liver fibrosis (1)
- machine learning (1)
- macrophage (1)
- mexicanus group (1)
- microparticles (1)
- microvesicles (1)
- minimal information requirements (1)
- mitochondrial disease (1)
- molecular diagnosis (1)
- monetary reform (1)
- monocyte chemotactic protein 1 (MCP-1) (1)
- neurodegeneration (1)
- new species (1)
- nucleotide metabolism (1)
- operating procedures (1)
- p+p collisions (1)
- phenotypic screening (1)
- phylogenetic community distance (1)
- preadaptation (1)
- protein kinase (1)
- quark gluon plasma (1)
- renal function (1)
- reproducibility (1)
- rigor (1)
- schizophrenia (1)
- schizophrenia spectrum (1)
- scorpion (1)
- senescence (1)
- signal transduction (1)
- small molecules (1)
- spectra (1)
- standardization (1)
- synuclein (1)
- systematics (1)
- taxonomy (1)
- transjugular intrahepatic portosystemic shunt (TIPS) (1)
- tropical forests (1)
- understudied kinase (1)
- working memory (1)
- √sN N = 2.76 TeV (1)
Institute
Measurements of inclusive and direct photon production at mid-rapidity in pp collisions at s√=2.76 and 8 TeV are presented by the ALICE experiment at the LHC. The results are reported in transverse momentum ranges of 0.4<pT<10 GeV/c and 0.3<pT<16 GeV/c, respectively. Photons are detected with the electromagnetic calorimeter~(EMCal) and via reconstruction of e+e− pairs from conversions in the ALICE detector material using the central tracking system. For the final measurement of the inclusive photon spectra the results are combined in the overlapping pT interval of both methods. Direct photon spectra, or their upper limits at 90% C.L. are extracted using the direct photon excess ratio Rγ, which quantifies the ratio of inclusive photons over decay photons generated with a decay-photon simulation. An additional hybrid method, combining photons reconstructed from conversions with those identified in the EMCal, is used for the combination of the direct photon excess ratio Rγ, as well as the extraction of direct photon spectra or their upper limits. While no significant signal of direct photons is seen over the full pT range, Rγ for pT>7 GeV/c is at least one σ above unity and consistent with expectations from next-to-leading order pQCD calculations.
Measurements of inclusive and direct photon production at mid-rapidity in pp collisions at s√=2.76 and 8 TeV are presented by the ALICE experiment at the LHC. The results are reported in transverse momentum ranges of 0.4<pT<10 GeV/c and 0.3<pT<16 GeV/c, respectively. Photons are detected with the electromagnetic calorimeter~(EMCal) and via reconstruction of e+e− pairs from conversions in the ALICE detector material using the central tracking system. For the final measurement of the inclusive photon spectra the results are combined in the overlapping pT interval of both methods. Direct photon spectra, or their upper limits at 90% C.L. are extracted using the direct photon excess ratio Rγ, which quantifies the ratio of inclusive photons over decay photons generated with a decay-photon simulation. An additional hybrid method, combining photons reconstructed from conversions with those identified in the EMCal, is used for the combination of the direct photon excess ratio Rγ, as well as the extraction of direct photon spectra or their upper limits. While no significant signal of direct photons is seen over the full pT range, Rγ for pT>7 GeV/c is at least one σ above unity and consistent with expectations from next-to-leading order pQCD calculations.
Transverse-momentum (pT) differential yields of electrons from semileptonic heavy-flavour hadron decays have been measured in the most central (0-10%) and in semi-central (20-40%) Pb-Pb collisions at sNN−−−√=2.76 TeV. The corresponding production cross section in pp collisions has been measured at the same energy with substantially reduced systematic uncertainties with respect to previously published results. The modification of the yield in Pb-Pb collisions with respect to the expectation from an incoherent superposition of nucleon-nucleon collisions is quantified at mid-rapidity (|y| < 0.8) in the pT interval 0.5-3 GeV/c via the nuclear modification factor, RAA. This paper extends the pT reach of the RAA measurement towards significantly lower values with respect to a previous publication. In Pb-Pb collisions the pT-differential measurements of yields at low pT are essential to investigate the scaling of heavy-flavour production with the number of binary nucleon-nucleon collisions. Heavy-quark hadronization, a collective expansion and even initial-state effects, such as the nuclear modification of the Parton Distribution Functions, are also expected to have a significant effect on the measured distribution.
Transverse-momentum (pT) differential yields of electrons from semileptonic heavy-flavour hadron decays have been measured in the most central (0-10%) and in semi-central (20-40%) Pb-Pb collisions at sNN−−−√=2.76 TeV. The corresponding production cross section in pp collisions has been measured at the same energy with substantially reduced systematic uncertainties with respect to previously published results. The modification of the yield in Pb-Pb collisions with respect to the expectation from an incoherent superposition of nucleon-nucleon collisions is quantified at mid-rapidity (|y| < 0.8) in the pT interval 0.5-3 GeV/c via the nuclear modification factor, RAA. This paper extends the pT reach of the RAA measurement towards significantly lower values with respect to a previous publication. In Pb-Pb collisions the pT-differential measurements of yields at low pT are essential to investigate the scaling of heavy-flavour production with the number of binary nucleon-nucleon collisions. Heavy-quark hadronization, a collective expansion and even initial-state effects, such as the nuclear modification of the Parton Distribution Functions, are also expected to have a significant effect on the measured distribution.
Inclusive J/ψ production at forward and backward rapidity in p–Pb collisions at √sNN = 8.16 TeV
(2018)
Inclusive J/ψ production is studied in p-Pb interactions at a centre-of-mass energy per nucleon-nucleon collision sNN−−−√=8.16 TeV, using the ALICE detector at the CERN LHC. The J/ψ meson is reconstructed, via its decay to a muon pair, in the centre-of-mass rapidity intervals 2.03<ycms<3.53 and −4.46<ycms<−2.96, where positive and negative ycms refer to the p-going and Pb-going direction, respectively. The transverse momentum coverage is pT<20 GeV/c. In this paper, ycms- and pT-differential cross sections for inclusive J/ψ production are presented, and the corresponding nuclear modification factors RpPb are shown. Forward results show a suppression of the J/ψ yield with respect to pp collisions, concentrated in the region pT≲5 GeV/c. At backward rapidity no significant suppression is observed. The results are compared to previous measurements by ALICE in p-Pb collisions at sNN−−−√=5.02 TeV and to theoretical calculations. Finally, the ratios RFB between forward- and backward-ycms RpPb values are shown and discussed.
Inclusive J/ψ production at forward and backward rapidity in p–Pb collisions at √sNN = 8.16 TeV
(2019)
Inclusive J/ψ production is studied in p-Pb interactions at a centre-of-mass energy per nucleon-nucleon collision sNN−−−√=8.16 TeV, using the ALICE detector at the CERN LHC. The J/ψ meson is reconstructed, via its decay to a muon pair, in the centre-of-mass rapidity intervals 2.03<ycms<3.53 and −4.46<ycms<−2.96, where positive and negative ycms refer to the p-going and Pb-going direction, respectively. The transverse momentum coverage is pT<20 GeV/c. In this paper, ycms- and pT-differential cross sections for inclusive J/ψ production are presented, and the corresponding nuclear modification factors RpPb are shown. Forward results show a suppression of the J/ψ yield with respect to pp collisions, concentrated in the region pT≲5 GeV/c. At backward rapidity no significant suppression is observed. The results are compared to previous measurements by ALICE in p-Pb collisions at sNN−−−√=5.02 TeV and to theoretical calculations. Finally, the ratios RFB between forward- and backward-ycms RpPb values are shown and discussed.
Charged-particle spectra at midrapidity are measured in Pb-Pb collisions at the centre-of-mass energy per nucleon-nucleon pair sNN−−−√ = 5.02 TeV and presented in centrality classes ranging from most central (0-5%) to most peripheral (95-100%) collisions. Possible medium effects are quantified using the nuclear modification factor (RAA) by comparing the measured spectra with those from proton-proton collisions, scaled by the number of independent nucleon-nucleon collisions obtained from a Glauber model. At large transverse momenta (8<pT<20 GeV/c), the average RAA is found to increase from about 0.15 in 0-5% central to a maximum value of about 0.8 in 75-85% peripheral collisions, beyond which it falls off strongly to below 0.2 for the most peripheral collisions. Furthermore, RAA initially exhibits a positive slope as a function of pT in the 8-20 GeV/c interval, while for collisions beyond the 80% class the slope is negative. To reduce uncertainties related to event selection and normalization, we also provide the ratio of RAA in adjacent centrality intervals. Our results in peripheral collisions are consistent with a PYTHIA-based model without nuclear modification, demonstrating that biases caused by the event selection and collision geometry can lead to the apparent suppression in peripheral collisions. This explains the unintuitive observation that RAA is below unity in peripheral Pb-Pb, but equal to unity in minimum-bias p-Pb collisions despite similar charged-particle multiplicities.
The production yield of the Λ(1520) baryon resonance is measured at mid-rapidity in Pb-Pb collisions at sNN−−−√ = 2.76 TeV with the ALICE detector at the LHC. The measurement is performed in the Λ(1520)→pK− (and charge conjugate) hadronic decay channel as a function of the transverse momentum (pT) and collision centrality. The pT-integrated production rate of Λ(1520) relative to Λ in central collisions is suppressed by about a factor of 2 with respect to peripheral collisions. This is the first observation of the suppression of a baryonic resonance at LHC and the first evidence of Λ(1520) suppression in heavy-ion collisions. The measured Λ(1520)/Λ ratio in central collisions is smaller than the value predicted by the statistical hadronisation model calculations. The shape of the measured pT distribution and the centrality dependence of the suppression are reproduced by the EPOS3 Monte Carlo event generator. The measurement adds further support to the formation of a dense hadronic phase in the final stages of the evolution of the fireball created in heavy-ion collisions, lasting long enough to cause a significant reduction in the observable yield of short-lived resonances.
The production yield of the Λ(1520) baryon resonance is measured at mid-rapidity in Pb-Pb collisions at sNN−−−√ = 2.76 TeV with the ALICE detector at the LHC. The measurement is performed in the Λ(1520)→pK− (and charge conjugate) hadronic decay channel as a function of the transverse momentum (pT) and collision centrality. The pT-integrated production rate of Λ(1520) relative to Λ in central collisions is suppressed by about a factor of 2 with respect to peripheral collisions. This is the first observation of the suppression of a baryonic resonance at the LHC and the first 3σ evidence of Λ(1520) suppression within a single collision system. The measured Λ(1520)/Λ ratio in central collisions is smaller than the value predicted by the statistical hadronisation model calculations. The shape of the measured pT distribution and the centrality dependence of the suppression are reproduced by the EPOS3 Monte Carlo event generator. The measurement adds further support to the formation of a dense hadronic phase in the final stages of the evolution of the fireball created in heavy-ion collisions, lasting long enough to cause a significant reduction in the observable yield of short-lived resonances.
The production yield of the Λ(1520) baryon resonance is measured at mid-rapidity in Pb-Pb collisions at sNN−−−√ = 2.76 TeV with the ALICE detector at the LHC. The measurement is performed in the Λ(1520)→pK− (and charge conjugate) hadronic decay channel as a function of the transverse momentum (pT) and collision centrality. The pT-integrated production rate of Λ(1520) relative to Λ in central collisions is suppressed by about a factor of 2 with respect to peripheral collisions. This is the first observation of the suppression of a baryonic resonance at the LHC and the first 3σ evidence of Λ(1520) suppression within a single collision system. The measured Λ(1520)/Λ ratio in central collisions is smaller than the value predicted by the statistical hadronisation model calculations. The shape of the measured pT distribution and the centrality dependence of the suppression are reproduced by the EPOS3 Monte Carlo event generator. The measurement adds further support to the formation of a dense hadronic phase in the final stages of the evolution of the fireball created in heavy-ion collisions, lasting long enough to cause a significant reduction in the observable yield of short-lived resonances.