Refine
Year of publication
Document Type
- Preprint (670)
- Article (439)
- Conference Proceeding (5)
- Doctoral Thesis (1)
- Part of Periodical (1)
- Working Paper (1)
Has Fulltext
- yes (1117)
Is part of the Bibliography
- no (1117)
Keywords
- Heavy Ion Experiments (20)
- 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)
- Heavy Ions (3)
- Jets and Jet Substructure (3)
- pp collisions (3)
- Beauty production (2)
- Charm physics (2)
- Diagnostik (2)
- Energiebereitstellung (2)
- Entzündung (2)
- Experimental nuclear physics (2)
- Experimental particle physics (2)
- Früherkennung (2)
- Gewebedurchblutung (2)
- Gewebetemperatur (2)
- HOD (2)
- Heavy Quark Production (2)
- Human behaviour (2)
- Infektionsabwehr (2)
- Lebensqualität (2)
- Lepton-Nucleon Scattering (experiments) (2)
- Mammakarzinom (2)
- Nachsorge (2)
- Particle Correlations and Fluctuations (2)
- Particle and resonance production (2)
- Particle correlations and fluctuations (2)
- Pb–Pb collisions (2)
- Problemwunden (2)
- Psychiatric disorders (2)
- QCD (2)
- Richtlinie (2)
- Sauerstoffpartialdruck im Gewebe (2)
- Sauerstoffversorgung (2)
- Schmerzminderung (2)
- Single electrons (2)
- Wundheilung (2)
- Wundinfektionen (2)
- Wundsekretion (2)
- acute wounds (2)
- akute Wunden (2)
- breast cancer (2)
- diagnosis (2)
- energy supply (2)
- follow‑up (2)
- guideline (2)
- infection defense (2)
- inflammation (2)
- oxygen supply (2)
- problem wounds (2)
- prospective, randomized, controlled, double-blind studies (2)
- reduction of pain (2)
- screening (2)
- temperaturabhängige und temperaturunabhängige Effekte (2)
- thermal and non-thermal effects (2)
- thermic and non-thermic effects (2)
- thermische und nicht-thermische Effekte (2)
- tissue blood flow (2)
- tissue oxygen partial pressure (2)
- tissue temperature (2)
- visual analog scales (VAS) (2)
- visuelle Analogskalen (VAS) (2)
- wassergefiltertes Infrarot A (wIRA) (2)
- water-filtered infrared-A (wIRA) (2)
- wound exudation (2)
- wound healing (2)
- wound infections (2)
- 900 GeV (1)
- ALICE detector (1)
- Acuris (1)
- Acute myeloid leukemia (1)
- Adhesion (1)
- All-trans retinoic acid (1)
- Anti-nuclei (1)
- Antirheumatic agents (1)
- Anxiety (1)
- Anxiety disorders (1)
- Ataxia-telangiectasia (1)
- Automobile Exhaust (1)
- Baryonic resonances (1)
- Bibliographie (1)
- Bidirectional genes (1)
- Boosted Jets (1)
- CAD/ CAM crown (1)
- CMS (1)
- CVID (1)
- Cardiomyocyte signaling pathways (1)
- Cardioprotection (1)
- Cardiovascular disease (1)
- Carotenoids (1)
- Cellulase (1)
- Cellulases (1)
- Centrality Class (1)
- Centrality Selection (1)
- Child (1)
- Chlorophyll Formation (1)
- Clinical trial (1)
- Collective Flow, (1)
- Colorectal cancer (1)
- Comorbidities (1)
- Comparative effectiveness research (1)
- Comparison with QCD (1)
- Consensus (1)
- Cucumis sativus (Cucumber) (1)
- CyberKnife (1)
- Dermatomyositis (1)
- Deutschland (1)
- Devic disease (1)
- Devic syndrome (1)
- Diagnosis (1)
- Drug targeting (1)
- Electron-pion identification (1)
- Electroweak interaction (1)
- Elliptic flow (1)
- Endothelial permeability (1)
- Energieumsatz <Medizin> (1)
- Epigenetics (1)
- Ethiopia (1)
- European Society for Immunodeficiencies (ESID) (1)
- Extended donor criteria (1)
- Extracellular RNA (eRNA) (1)
- Extreme hypo-fractionation (1)
- Femtoscopy (1)
- Fibre/foam sandwich radiator (1)
- Film (1)
- Flagellaten (1)
- Flagellates (1)
- Freezeout (1)
- Galleria mellonella (1)
- German PID-NET registry (1)
- Geschichte 1933-1945 (1)
- HBT (1)
- HUVEC (1)
- Hadron production (1)
- Hadron-Hadron Scattering Heavy (1)
- Hadron-hadron interactions (1)
- Hard Scattering (1)
- Heart regeneration (1)
- Heat-Bleaching (of Plastids) (1)
- Heavy Ion Experiment (1)
- Heavy flavor production (1)
- Heavy flavour production (1)
- Heavy ions (1)
- Heavy-flavour decay muons (1)
- Heavy-flavour production (1)
- Heavy-ion collisions (1)
- Heavy-ion reactions (1)
- Historikerstreit <1986-1989> (1)
- Holmes tremor (1)
- Hyperons (1)
- IgA deficiency (1)
- IgG substitution therapy (1)
- Immunodeficiency (1)
- Immunoglobulins (1)
- Inclusive spectra (1)
- Induced pluripotent stem cells (1)
- Infrarot (1)
- Intensity interferometry (1)
- Interpersonal relationships (1)
- Invariant Mass Distribution (1)
- Ionisation energy loss (1)
- Ischemia–reperfusion injury (1)
- Isoprenoids (1)
- JAWSTAT pathway (1)
- Jet Physics (1)
- Jet Substructure (1)
- Kontroverse (1)
- Latent Injury (1)
- Lipid metabolism (1)
- Localized prostate cancer (1)
- Lymphopenia Mortality (1)
- Mastotermes (1)
- Material budget (1)
- Menschenversuch (1)
- Mental health therapies (1)
- Mevalonic Acid (1)
- MicroRNAs (miRNAs) (1)
- Mid-rapidity (1)
- Minimum Bias (1)
- Mitochondria (1)
- Molecular neuroscience (1)
- Monte Carlo (1)
- Mortality (1)
- Multi-Parton Interactions (1)
- Multi-strange baryons (1)
- Multi-wire proportional drift chamber (1)
- N immission (1)
- NMO-IgG (1)
- Neural network (1)
- Neuromyelitis optica (1)
- Nuclear modification factor (1)
- Nucleophosmin-1 (1)
- Nucleus (1)
- Organ allocation (1)
- Oxidative Stress (1)
- Ozone (1)
- PID prevalence (1)
- PPARγ (1)
- PYTHIA (1)
- Pancreas transplantation (1)
- Particle and Resonance Production (1)
- Patients (1)
- Pb–Pb (1)
- Personalized medicine (1)
- Predictive markers (1)
- Production Cross Section (1)
- Properties of Hadrons (1)
- Proton (1)
- Proton–proton (1)
- Psychometrics (1)
- Psychotherapy (1)
- Quark Deconfinement (1)
- Quark Gluon Plasma (1)
- Quark Production (1)
- Quark gluon plasma (1)
- Quarkonium (1)
- Questionnaires (1)
- Rapidity Range (1)
- Rejection (1)
- Relativistic heavy ion physics (1)
- Relativistic heavy-ion collisions (1)
- Remote ischemic conditioning (1)
- Resolution Parameter (1)
- Robotic Radiosurgery (1)
- SO2 reduction (1)
- STAT3 (1)
- Schmerz (1)
- Sekretion (1)
- Single muons (1)
- Single-cell RNA-seq (1)
- Spirocheten (1)
- Spirochetes (1)
- Stereotactic body radiation therapy (1)
- Strangeness (1)
- Systematic Uncertainty (1)
- TR (1)
- Termiten (1)
- Termites (1)
- Tigray (1)
- Time Projection Chamber (1)
- Tracking (1)
- Transition radiation detector (1)
- Transverse momentum (1)
- Trigger (1)
- Vector Boson Production (1)
- Vergangenheitsbewältigung (1)
- Viktor von ; Ärzteprozess ; Kontroverse (1)
- Weizsäcker (1)
- Weizsäcker, Viktor von (1)
- Wunde (1)
- Wundinfektion (1)
- Xenon-based gas mixture (1)
- antiviral therapy (1)
- aquaporin-4 (AQP4) antibody (1)
- axions (1)
- bacterial leakage (1)
- biogeographic legaciese (1)
- biomarker (1)
- cell proliferation (1)
- cerebellar mutism (1)
- cerebellum (1)
- cerebrospinal fluid (1)
- chronic viral hepatitis (1)
- cirrhosis (1)
- climatic change (1)
- clinical features (1)
- clinically important restrictions and symptoms (1)
- conical coupling (1)
- conometric connection (1)
- dE/dx (1)
- dark matter experiments (1)
- detector (1)
- doppeltblinde Studien (1)
- endothelial cells (1)
- epidemiology (1)
- everolimus (1)
- experimental results (1)
- forest classification (1)
- forest functional similarity (1)
- glioblastoma survival (1)
- health-related quality of life (1)
- heavy ion experiments (1)
- hepatitis c (1)
- honey bee classification (1)
- host cell response (1)
- kontrollierte Studien (1)
- longitudinally extensive transverse myelitis (1)
- magnetic resonance imaging (1)
- marginal fit (1)
- medulloblastoma (1)
- medulloblastoma resection (1)
- metabolic syndrome (1)
- metastatic renal cell carcinoma (1)
- montelukast (1)
- mtDNA haplotypes (1)
- neurosurgery (1)
- observational study (1)
- palatal tremor (1)
- phase IV (1)
- phylogenetic community distance (1)
- polypharmacology (1)
- posterior fossa masses (1)
- pranlukast (1)
- primary immunodeficiency (PID) (1)
- prospektive Studien (1)
- prospektive, randomisierte, kontrollierte, doppeltblinde Studien (1)
- pulmonary embolism (1)
- quality of lif (1)
- quality of life (1)
- quark gluon plasma (1)
- randomisierte Studien (1)
- range expansion (1)
- rare disease (1)
- recurrence pattern (1)
- recurrent optic neuritis (1)
- registry for primary immunodeficiency (1)
- sarcoma (1)
- second-line (1)
- solar physics (1)
- soluble epoxide hydrolase (1)
- spectra (1)
- therapeutic anticoagulation (1)
- tropical forests (1)
- white and brown dwarfs (1)
- wing geometric morphometrics (1)
- xenograft (1)
- zafirlukast (1)
- √sN N = 2.76 TeV (1)
Institute
- Physik (1053)
- Frankfurt Institute for Advanced Studies (FIAS) (955)
- Informatik (921)
- Medizin (40)
- Biowissenschaften (8)
- Geowissenschaften (4)
- Informatik und Mathematik (3)
- Biochemie und Chemie (2)
- Biodiversität und Klima Forschungszentrum (BiK-F) (2)
- Gesellschaftswissenschaften (2)
The ALICE Collaboration reports the measurement of the relative J/ψ yield as a function of charged particle pseudorapidity density dNch/dη in pp collisions at √s=7 TeV at the LHC. J/ψ particles are detected for pt>0, in the rapidity interval |y|<0.9 via decay into e+e−, and in the interval 2.5<y<4.0 via decay into μ+μ− pairs. An approximately linear increase of the J/ψ yields normalized to their event average (dNJ/ψ/dy)/〈dNJ/ψ/dy〉 with (dNch/dη)/〈dNch/dη〉 is observed in both rapidity ranges, where dNch/dη is measured within |η|<1 and pt>0. In the highest multiplicity interval with 〈dNch/dη(bin)〉=24.1, corresponding to four times the minimum bias multiplicity density, an enhancement relative to the minimum bias J/ψ yield by a factor of about 5 at 2.5<y<4 (8 at |y|<0.9) is observed.
A measurement of the multi-strange Ξ− and Ω− baryons and their antiparticles by the ALICE experiment at the CERN Large Hadron Collider (LHC) is presented for inelastic proton–proton collisions at a centre-of-mass energy of 7 TeV. The transverse momentum (pT) distributions were studied at mid-rapidity (|y|<0.5) in the range of 0.6<pT<8.5 GeV/c for Ξ− and Ξ¯+ baryons, and in the range of 0.8<pT<5 GeV/c for Ω− and Ω¯+. Baryons and antibaryons were measured as separate particles and we find that the baryon to antibaryon ratio of both particle species is consistent with unity over the entire range of the measurement. The statistical precision of the current data has allowed us to measure a difference between the mean pT of Ξ− (Ξ¯+) and Ω− (Ω¯+). Particle yields, mean pT, and the spectra in the intermediate pT range are not well described by the PYTHIA Perugia 2011 tune Monte Carlo event generator, which has been tuned to reproduce the early LHC data. The discrepancy is largest for Ω− (Ω¯+). This PYTHIA tune approaches the pT spectra of Ξ− and Ξ¯+ baryons below pT<0.85 GeV/c and describes the Ξ− and Ξ¯+ spectra above pT>6.0 GeV/c. We also illustrate the difference between the experimental data and model by comparing the corresponding ratios of (Ω−+Ω¯+)/(Ξ−+Ξ¯+) as a function of transverse mass.
The ALICE Zero Degree Calorimeter system (ZDC) is composed of two identical sets of calorimeters, placed at opposite sides with respect to the interaction point, 114 meters away from it, complemented by two small forward electromagnetic calorimeters (ZEM). Each set of detectors consists of a neutron (ZN) and a proton (ZP) ZDC. They are placed at zero degrees with respect to the LHC axis and allow to detect particles emitted close to beam direction, in particular neutrons and protons emerging from hadronic heavy-ion collisions (spectator nucleons) and those emitted from electromagnetic processes. For neutrons emitted by these two processes, the ZN calorimeters have nearly 100% acceptance.
During the √sNN = 2.76 TeV Pb-Pb data-taking, the ALICE Collaboration studied forward neutron emission with a dedicated trigger, requiring a minimum energy deposition in at least one of the two ZN. By exploiting also the information of the two ZEM calorimeters it has been possible to separate the contributions of electromagnetic and hadronic processes and to study single neutron vs. multiple neutron emission.
The measured cross sections of single and mutual electromagnetic dissociation of Pb nuclei at √sNN = 2.76 TeV, with neutron emission, are σsingle EMD = 187:4 ± 0.2 (stat.)−11.2+13.2 (syst.) b and σmutual EMD = 5.7 ± 0.1 (stat.) ±0.4 (syst.) b, respectively [1]. This is the first measurement of electromagnetic dissociation of 208Pb nuclei at the LHC energies, allowing a test of electromagnetic dissociation theory in a new energy regime. The experimental results are compared to the predictions from a relativistic electromagnetic dissociation model.
At particle collider experiments, elementary particle interactions with large momentum transfer produce quarks and gluons (known as partons) whose evolution is governed by the strong force, as described by the theory of quantum chromodynamics (QCD). The vacuum is not transparent to the partons and induces gluon radiation and quark pair production in a process that can be described as a parton shower. Studying the pattern of the parton shower is one of the key experimental tools in understanding the properties of QCD. This pattern is expected to depend on the mass of the initiating parton, through a phenomenon known as the dead-cone effect, which predicts a suppression of the gluon spectrum emitted by a heavy quark of mass m and energy E, within a cone of angular size m/E around the emitter. A direct observation of the dead-cone effect in QCD has not been possible until now, due to the challenge of reconstructing the cascading quarks and gluons from the experimentally accessible bound hadronic states. We report the first direct observation of the QCD dead-cone by using new iterative declustering techniques to reconstruct the parton shower of charm quarks. This result confirms a fundamental feature of QCD, which is derived more generally from its origin as a gauge quantum field theory. Furthermore, the measurement of a dead-cone angle constitutes a direct experimental observation of the non-zero mass of the charm quark, which is a fundamental constant in the standard model of particle physics.
In particle collider experiments, elementary particle interactions with large momentum transfer produce quarks and gluons (known as partons) whose evolution is governed by the strong force, as described by the theory of quantum chromodynamics (QCD). These partons subsequently emit further partons in a process that can be described as a parton shower which culminates in the formation of detectable hadrons. Studying the pattern of the parton shower is one of the key experimental tools for testing QCD. This pattern is expected to depend on the mass of the initiating parton, through a phenomenon known as the dead-cone effect, which predicts a suppression of the gluon spectrum emitted by a heavy quark of mass mQ and energy E, within a cone of angular size mQ/E around the emitter. Previously, a direct observation of the dead-cone effect in QCD had not been possible, owing to the challenge of reconstructing the cascading quarks and gluons from the experimentally accessible hadrons. We report the direct observation of the QCD dead cone by using new iterative declustering techniques to reconstruct the parton shower of charm quarks. This result confirms a fundamental feature of QCD. Furthermore, the measurement of a dead-cone angle constitutes a direct experimental observation of the non-zero mass of the charm quark, which is a fundamental constant in the standard model of particle physics.
We present measurements of the azimuthal dependence of charged jet production in central and semi-central √sNN=2.76 TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified as v2ch jet. Jet finding is performed employing the anti-kT algorithm with a resolution parameter R=0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero v2ch jet is observed in semi-central collisions (30–50% centrality) for 20<pTch jet<90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the v2 of single charged particles at high pT. Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions.
We present measurements of the elliptic (v2), triangular (v3) and quadrangular (v4) anisotropic azimuthal flow over a wide range of pseudorapidities (−3.5<η<5). The measurements are performed with Pb–Pb collisions at √sNN=2.76 TeV using the ALICE detector at the Large Hadron Collider (LHC). The flow harmonics are obtained using two- and four-particle correlations from nine different centrality intervals covering central to peripheral collisions. We find that the shape of vn(η) is largely independent of centrality for the flow harmonics n=2–4, however the higher harmonics fall off more steeply with increasing |η|. We assess the validity of extended longitudinal scaling of v2 by comparing to lower energy measurements, and find that the higher harmonic flow coefficients are proportional to the charged particle densities at larger pseudorapidities. Finally, we compare our measurements to both hydrodynamical and transport models, and find they both have challenges when it comes to describing our data.
The production of charged pions, kaons and (anti)protons has been measured at mid-rapidity (−0.5<y<0) in p–Pb collisions at √sNN=5.02 TeV using the ALICE detector at the LHC. Exploiting particle identification capabilities at high transverse momentum (pT), the previously published pT spectra have been extended to include measurements up to 20 GeV/c for seven event multiplicity classes. The pT spectra for pp collisions at s=7 TeV, needed to interpolate a pp reference spectrum, have also been extended up to 20 GeV/c to measure the nuclear modification factor (RpPb) in non-single diffractive p–Pb collisions. At intermediate transverse momentum (2<pT<10 GeV/c) the proton-to-pion ratio increases with multiplicity in p–Pb collisions, a similar effect is not present in the kaon-to-pion ratio. The pT dependent structure of such increase is qualitatively similar to those observed in pp and heavy-ion collisions. At high pT (>10 GeV/c), the particle ratios are consistent with those reported for pp and Pb–Pb collisions at the LHC energies. At intermediate pT the (anti)proton RpPb shows a Cronin-like enhancement, while pions and kaons show little or no nuclear modification. At high pT the charged pion, kaon and (anti)proton RpPb are consistent with unity within statistical and systematic uncertainties.
We have performed the first measurement of the coherent ψ(2S) photo-production cross section in ultra-peripheral PbPb collisions at the LHC. This charmonium excited state is reconstructed via the ψ(2S)→l+l− and ψ(2S)→J/ψπ+π− decays, where the J/ψ decays into two leptons. The analysis is based on an event sample corresponding to an integrated luminosity of about 22 μb−1. The cross section for coherent ψ(2S) production in the rapidity interval −0.9<y<0.9 is dσψ(2S)coh/dy=0.83±0.19(stat+syst) mb. The ψ(2S) to J/ψ coherent cross section ratio is 0.34−0.07+0.08(stat+syst). The obtained results are compared to predictions from theoretical models.
Charged jet production cross sections in p–Pb collisions at √sNN=5.02 TeV measured with the ALICE detector at the LHC are presented. Using the anti-kT algorithm, jets have been reconstructed in the central rapidity region from charged particles with resolution parameters R=0.2 and R=0.4. The reconstructed jets have been corrected for detector effects and the underlying event background. To calculate the nuclear modification factor, RpPb, of charged jets in p–Pb collisions, a pp reference was constructed by scaling previously measured charged jet spectra at s=7 TeV. In the transverse momentum range 20≤pT,chjet≤120 GeV/c, RpPb is found to be consistent with unity, indicating the absence of strong nuclear matter effects on jet production. Major modifications to the radial jet structure are probed via the ratio of jet production cross sections reconstructed with the two different resolution parameters. This ratio is found to be similar to the measurement in pp collisions at √s=7 TeV and to the expectations from PYTHIA pp simulations and NLO pQCD calculations at √sNN=5.02 TeV.