Refine
Year of publication
Document Type
- Preprint (721)
- Article (416)
- Working Paper (2)
Language
- English (1139)
Has Fulltext
- yes (1139)
Is part of the Bibliography
- no (1139)
Keywords
- Heavy Ion Experiments (21)
- Hadron-Hadron scattering (experiments) (12)
- Hadron-Hadron Scattering (10)
- Heavy-ion collision (6)
- Collective Flow (4)
- Heavy-ion collisions (4)
- Diffraction (3)
- Elastic scattering (3)
- Heavy Quark Production (3)
- Beam Energy Scan (2)
- Charm physics (2)
- Chiral Magnetic Effect (2)
- Collectivity (2)
- Comorbidities (2)
- Correlation (2)
- Experimental nuclear physics (2)
- Experimental particle physics (2)
- Heavy Ions (2)
- Jets (2)
- Jets and Jet Substructure (2)
- Lepton-Nucleon Scattering (experiments) (2)
- Particle Correlations and Fluctuations (2)
- Particle and resonance production (2)
- Particle correlations and fluctuations (2)
- Polarization (2)
- QCD (2)
- Quark-Gluon Plasma (2)
- RHIC (2)
- STAR (2)
- Shear viscosity (2)
- ABC Transporter (1)
- ALICE detector (1)
- Active middle ear implants (1)
- Animal models (1)
- Anti-nuclei (1)
- Antigen Processing (1)
- Attention-deficit/hyperactivity disorder (1)
- Auditory system (1)
- B-slope (1)
- Beam energy scan (1)
- Behavioral tests (1)
- Biodiversity (1)
- Bone conduction devices (1)
- Boosted Jets (1)
- Cardiomyocyte signaling pathways (1)
- Cardioprotection (1)
- Cardiovascular disease (1)
- Cellular Immune Response (1)
- Centrality Class (1)
- Centrality Selection (1)
- Charged-particle multiplicity (1)
- Charm quark spatial diffusion coefficient (1)
- Charmonia (1)
- Chiral magnetic effect (1)
- ClpB (1)
- Coalescence (1)
- Cold nuclear matter effects (1)
- Collective Flow, (1)
- Consensus statement (1)
- Critical point (1)
- Data management (1)
- Data sharing (1)
- Deuteron production (1)
- Di-hadron correlations (1)
- Drug targeting (1)
- EBV (1)
- ERAL1 (1)
- Ecosystems (1)
- Ed Diener (1)
- Electron-pion identification (1)
- Electroweak interaction (1)
- Elliptic flow (1)
- Endothelial permeability (1)
- Environment (1)
- Epigenetics (1)
- Extracellular RNA (eRNA) (1)
- Fibre/foam sandwich radiator (1)
- Flow (1)
- Forward physics (1)
- Fruit fly (1)
- Gene (1)
- Genetics (1)
- Get Pathway (1)
- Groomed jet radius (1)
- HARS2 (1)
- Hadron-hadron interactions (1)
- Hadronization (1)
- Hard Scattering (1)
- Health policy (1)
- Heart regeneration (1)
- Heavy ion collisions (1)
- Heavy ions (1)
- Heavy-Ion Collision (1)
- Heavy-flavor decay electron (1)
- Heavy-ion (1)
- Higher moments (1)
- Induced pluripotent stem cells (1)
- Interference fragmentation function (1)
- Intracellular Trafficking (1)
- Invariant Mass Distribution (1)
- Ionisation energy loss (1)
- Ischemia–reperfusion injury (1)
- J/ψ suppression (1)
- Jet Physics (1)
- Jet Substructure (1)
- Jet substructure (1)
- KCGS (1)
- LARS2 (1)
- LHC (1)
- LTER (1)
- Lipid metabolism (1)
- Long‐term ecosystem research (1)
- Material budget (1)
- MicroRNAs (miRNAs) (1)
- Minimum Bias (1)
- Mitochondria (1)
- Mixed hearing loss (1)
- Monte Carlo (1)
- Mouse (1)
- Multi-Parton Interactions (1)
- Multi-stakeholder approach (1)
- Multi-wire proportional drift chamber (1)
- Multiple parton interactions (1)
- Net-charge correlations (1)
- Net-charge fluctuations (1)
- Neural network (1)
- Nonflow (1)
- Observation (1)
- Parkinson’s disease (1)
- Particle and Resonance Production (1)
- Pb–Pb collisions (1)
- Production Cross Section (1)
- Proton-proton collisions (1)
- Proton–proton collisions (1)
- Psychiatric traits (1)
- Quark Deconfinement (1)
- Quark Gluon Plasma (1)
- Quark gluon plasma (1)
- Quarkonium (1)
- Rapidity Range (1)
- Rehabilitation (1)
- Relativistic heavy ion physics (1)
- Relativistic heavy-ion collisions (1)
- Remote ischemic conditioning (1)
- Research infrastructure (1)
- Resolution Parameter (1)
- Rodents (1)
- Site networks (1)
- Socio-ecology (1)
- SoftDrop (1)
- Spin alignment (1)
- Splitting function (1)
- Surgery (1)
- Systematic Uncertainty (1)
- TR (1)
- TWNK (1)
- Tail-anchored Proteins (1)
- Technical data (1)
- Thermal model (1)
- Time Projection Chamber (1)
- Tracking (1)
- Transition radiation detector (1)
- Transversity (1)
- Trigger (1)
- Viral Immunology (1)
- Xenon-based gas mixture (1)
- Zebrafish (1)
- acute‐on‐chronic liver failure (1)
- alleles (1)
- antilocality (1)
- ataxia (1)
- autism spectrum disorder (1)
- autistic disorder (1)
- biogeographic legaciese (1)
- chemogenomic set (1)
- circulation (1)
- cirrhosis (1)
- color vision (1)
- contextual modulation (1)
- copy number polymorphism (1)
- dE/dx (1)
- detector (1)
- drug discovery (1)
- druggable genome (1)
- efficient coding (1)
- experimental results (1)
- focus movement (1)
- forest classification (1)
- forest functional similarity (1)
- gamma oscillations (1)
- genes (1)
- genetics (1)
- genome (1)
- genotype (1)
- genotype determination (1)
- global change (1)
- habitat destruction (1)
- happiness (1)
- heavy ion experiments (1)
- heavy-ion collisions (1)
- hemodynamic (1)
- inflammation (1)
- kinase inhibitor (1)
- land use (1)
- leukodystrophy (1)
- life satisfaction (1)
- neuroscience (1)
- obituary (1)
- obituary announcement (1)
- p+p collisions (1)
- phenotype (1)
- phenotypic screening (1)
- phylogenetic community distance (1)
- positive psychology (1)
- predictive coding (1)
- protein kinase (1)
- quark gluon plasma (1)
- research article (1)
- resumptive pronouns (1)
- rhesus macaque (1)
- single nucleotide polymorphism (1)
- small molecules (1)
- subject-only resumption (1)
- subjective well-being (1)
- surround suppression (1)
- tropical forests (1)
- understudied kinase (1)
- Υ suppression (1)
Institute
- Physik (1026)
- Frankfurt Institute for Advanced Studies (FIAS) (982)
- Informatik (866)
- Medizin (15)
- Geowissenschaften (4)
- Institut für Ökologie, Evolution und Diversität (4)
- Informatik und Mathematik (3)
- Biochemie und Chemie (2)
- Biodiversität und Klima Forschungszentrum (BiK-F) (2)
- Center for Financial Studies (CFS) (2)
This article presents groomed jet substructure measurements in pp and Pb−Pb collisions at sNN−−−√=5.02 TeV with the ALICE detector. The Soft Drop grooming algorithm provides access to the hard parton splittings inside a jet by removing soft wide-angle radiation. We report the groomed jet momentum splitting fraction, zg, and the (scaled) groomed jet radius, θg. Charged-particle jets are reconstructed at midrapidity using the anti-kT algorithm with resolution parameters R=0.2 and R=0.4. In heavy-ion collisions, the large underlying event poses a challenge for the reconstruction of groomed jet observables, since fluctuations in the background can cause groomed parton splittings to be misidentified. By using strong grooming conditions to reduce this background, we report these observables fully corrected for detector effects and background fluctuations for the first time. A narrowing of the θg distribution in Pb−Pb collisions compared to pp collisions is seen, which provides direct evidence of the modification of the angular structure of jets in the quark−gluon plasma. No significant modification of the zg distribution in Pb−Pb collisions compared to pp collisions is observed. These results are compared with a variety of theoretical models of jet quenching, and provide constraints on jet energy-loss mechanisms and coherence effects in the quark−gluon plasma.
The production of J/ψ is measured at midrapidity (|y|<0.9) in proton-proton collisions at s√ = 5.02 and 13 TeV, through the dielectron decay channel, using the ALICE detector at the Large Hadron Collider. The data sets used for the analyses correspond to integrated luminosities of Lint = 19.4 ± 0.4 nb−1 and Lint = 32.2 ± 0.5 nb−1 at s√ = 5.02 and 13 TeV, respectively. The fraction of non-prompt J/ψ mesons, i.e. those originating from the decay of beauty hadrons, is measured down to a transverse momentum pT = 2 GeV/c (1 GeV/c) at s√ = 5.02 TeV (13 TeV). The pT and rapidity (y) differential cross sections, as well as the corresponding values integrated over pT and y, are carried out separately for prompt and non-prompt J/ψ mesons. The results are compared with measurements from other experiments and theoretical calculations based on quantum chromodynamics (QCD). The shape of the pT and y distributions of beauty quarks predicted by state-of-the-art perturbative QCD models are used to extrapolate the bb¯¯¯ pair cross section at midrapidity and in the total phase space. The total bb¯¯¯ cross sections are found to be σbb¯¯¯=502±16(stat.)±51(syst.)+2−3(extr.) μb and σbb¯¯¯=218±37(stat.)±32(syst.)+8.2−9.1(extr.)μb at s√ = 13 and 5.02 TeV, respectively. The value at s√ = 13 TeV is obtained from the combination of ALICE and LHCb measurements.
The production of J/ψ is measured at midrapidity (|y|<0.9) in proton-proton collisions at s√ = 5.02 and 13 TeV, through the dielectron decay channel, using the ALICE detector at the Large Hadron Collider. The data sets used for the analyses correspond to integrated luminosities of Lint = 19.4 ± 0.4 nb−1 and Lint = 32.2 ± 0.5 nb−1 at s√ = 5.02 and 13 TeV, respectively. The fraction of non-prompt J/ψ mesons, i.e. those originating from the decay of beauty hadrons, is measured down to a transverse momentum pT = 2 GeV/c (1 GeV/c) at s√ = 5.02 TeV (13 TeV). The pT and rapidity (y) differential cross sections, as well as the corresponding values integrated over pT and y, are carried out separately for prompt and non-prompt J/ψ mesons. The results are compared with measurements from other experiments and theoretical calculations based on quantum chromodynamics (QCD). The shapes of the pT and y distributions of beauty quarks predicted by state-of-the-art perturbative QCD models are used to extrapolate an estimate of the bb¯¯¯ pair cross section at midrapidity and in the total phase space. The total bb¯¯¯ cross sections are found to be σbb¯¯¯=541±45(stat.)±69(syst.)+10−12(extr.) μb and σbb¯¯¯ = 218±37(stat.)±31(syst.)+8.2−9.1(extr.) μb at s√ = 13 and 5.02 TeV, respectively. The value obtained from the combination of ALICE and LHCb measurements in pp collisions at s√ = 13 TeV is also provided.
This article presents groomed jet substructure measurements in pp and Pb−Pb collisions at √sNN=5.02 TeV with the ALICE detector. The soft drop grooming algorithm provides access to the hard parton splittings inside a jet by removing soft wide-angle radiation. We report the groomed jet momentum splitting fraction, zg, and the (scaled) groomed jet radius, θg. Charged-particle jets are reconstructed at midrapidity using the anti-kT algorithm with resolution parameters R=0.2 and R=0.4. In heavy-ion collisions, the large underlying event poses a challenge for the reconstruction of groomed jet observables, since fluctuations in the background can cause groomed parton splittings to be misidentified. By using strong grooming conditions to reduce this background, we report these observables fully corrected for detector effects and background fluctuations for the first time. A narrowing of the θg distribution in Pb−Pb collisions compared to pp collisions is seen, which provides direct evidence of the modification of the angular structure of jets in the quark-gluon plasma. No significant modification of the zg distribution in Pb−Pb collisions compared to pp collisions is observed. These results are compared with a variety of theoretical models of jet quenching, and provide constraints on jet energy-loss mechanisms and coherence effects in the quark-gluon plasma.
This article presents groomed jet substructure measurements in pp and Pb−Pb collisions at sNN−−−√=5.02 TeV with the ALICE detector. The Soft Drop grooming algorithm provides access to the hard parton splittings inside a jet by removing soft wide-angle radiation. We report the groomed jet momentum splitting fraction, zg, and the (scaled) groomed jet radius, θg. Charged-particle jets are reconstructed at midrapidity using the anti-kT algorithm with resolution parameters R=0.2 and R=0.4. In heavy-ion collisions, the large underlying event poses a challenge for the reconstruction of groomed jet observables, since fluctuations in the background can cause groomed parton splittings to be misidentified. By using strong grooming conditions to reduce this background, we report these observables fully corrected for detector effects and background fluctuations for the first time. A narrowing of the θg distribution in Pb−Pb collisions compared to pp collisions is seen, which provides direct evidence of the modification of the angular structure of jets in the quark−gluon plasma. No significant modification of the zg distribution in Pb−Pb collisions compared to pp collisions is observed. These results are compared with a variety of theoretical models of jet quenching, and provide constraints on jet energy-loss mechanisms and coherence effects in the quark−gluon plasma.
Neutral pion and η meson production cross sections were measured up to unprecedentedly high transverse momenta (pT) in p-Pb collisions at sNN−−−√ = 8.16 TeV. The mesons were reconstructed via their two-photon decay channel in the rapidity interval −1.3<y<0.3 in the ranges of 0.4<pT<200 GeV/c and 1.0<pT<50 GeV/c, respectively. The respective nuclear modification factor (RpPb) is presented for pT up to of 200 and 30 GeV/c, where the former was achieved extending the π0 measurement in pp collisions at s√ = 8 TeV. The values of RpPb are below unity for pT<10 GeV/c, while they are consistent with unity for pT>10 GeV/c. The new data provide constraints for nuclear parton distribution and fragmentation functions over a broad kinematic range and are compared to model predictions as well as previous results at sNN−−−√ = 5.02 TeV.
Neutral pion and η meson production cross sections were measured up to unprecedentedly high transverse momenta (pT) in p-Pb collisions at sNN−−−√ = 8.16 TeV. The mesons were reconstructed via their two-photon decay channel in the rapidity interval −1.3<y<0.3 in the ranges of 0.4<pT<200 GeV/c and 1.0<pT<50 GeV/c, respectively. The respective nuclear modification factor (RpPb) is presented for pT up to of 200 and 30 GeV/c, where the former was achieved extending the π0 measurement in pp collisions at s√ = 8 TeV. The values of RpPb are below unity for pT<10 GeV/c, while they are consistent with unity for pT>10 GeV/c. The new data provide constraints for nuclear parton distribution and fragmentation functions over a broad kinematic range and are compared to model predictions as well as previous results at sNN−−−√ = 5.02 TeV.
Neutral pion (π0) and η meson production cross sections were measured up to unprecedentedly high transverse momenta (pT) in p-Pb collisions at sNN−−−√ = 8.16 TeV. The mesons were reconstructed via their two-photon decay channel in the rapidity interval −1.3<y<0.3 in the ranges of 0.4<pT<200 GeV/c and 1.0<pT<50 GeV/c, respectively. The respective nuclear modification factor (RpPb) is presented for pT up to of 200 and 30 GeV/c, where the former was achieved by extending the π0 measurement in pp collisions at s√ = 8 TeV using the merged cluster technique. The values of RpPb are below unity for pT<10 GeV/c, while they are consistent with unity for pT>10 GeV/c, leaving essentially no room for final state energy loss. The new data provide strong constraints for nuclear parton distribution and fragmentation functions over a broad kinematic range and are compared to model predictions as well as previous results at sNN−−−√ = 5.02 TeV.
The coherent photoproduction of J/ψ and ψ′ mesons was measured in ultra-peripheral Pb-Pb collisions at a center-of-mass energy sNN−−−√ = 5.02 TeV with the ALICE detector. Charmonia are detected in the central rapidity region for events where the hadronic interactions are strongly suppressed. The J/ψ is reconstructed using the dilepton (l+l−) and proton-antiproton decay channels, while for the ψ′, the dilepton and the l+l−π+π− decay channels are studied. The analysis is based on an event sample corresponding to an integrated luminosity of about 233 μb−1. The results are compared with theoretical models for coherent J/ψ and ψ′ photoproduction. The coherent cross section is found to be in a good agreement with models incorporating moderate nuclear gluon shadowing of about 0.65 at a Bjorken-x of around 6×10−4, such as the EPS09 parametrization, however none of the models is able to fully describe the rapidity dependence of the coherent J/ψ cross section including ALICE measurements at forward rapidity. The ratio of ψ′ to J/ψ coherent photoproduction cross sections was also measured and found to be consistent with the one for photoproduction off protons.
This Letter presents the first experimental evidence of the attractive strong interaction between a proton and a ϕ meson. The result is obtained from two-particle correlations of combined p-ϕ⊕p¯¯¯-ϕ pairs measured in high-multiplicity pp collisions at s√ = 13 TeV by the ALICE collaboration. The spin-averaged scattering length and effective range of the p-ϕ interaction are extracted from the fully corrected correlation function employing the Lednický-Lyuboshits approach. In particular, the imaginary part of the scattering length vanishes within uncertainties, indicating that inelastic processes do not play a prominent role for the p-ϕ interaction. These data demonstrate that the interaction is dominated by elastic p-ϕ scattering. Furthermore, an analysis employing phenomenological Gaussian- and Yukawa-type potentials is conducted. Under the assumption of the latter, the N-ϕ coupling constant is found to be gN−ϕ=0.14±0.03(stat.)±0.02(syst.). This work provides valuable experimental input to accomplish a self-consistent description of the N-ϕ interaction, which is particularly relevant for the more fundamental studies on partial restoration of chiral symmetry in nuclear medium.