Refine
Year of publication
Document Type
- Preprint (541)
- Article (318)
- Working Paper (4)
Has Fulltext
- yes (863)
Is part of the Bibliography
- no (863)
Keywords
- Heavy Ion Experiments (20)
- Hadron-Hadron scattering (experiments) (11)
- Hadron-Hadron Scattering (8)
- Heavy-ion collision (5)
- Collective Flow (4)
- Quark-Gluon Plasma (4)
- EEG (3)
- Jets (3)
- Jets and Jet Substructure (3)
- MRI (3)
- Atherosclerosis (2)
- Atmospheric science (2)
- Biomarker (2)
- Bone density (2)
- COVID-19 (2)
- Climate change (2)
- Experimental models of disease (2)
- Experimental nuclear physics (2)
- Experimental particle physics (2)
- Heavy Quark Production (2)
- High-throughput screening (2)
- Lepton-Nucleon Scattering (experiments) (2)
- Oncology (2)
- Osteoporosis (2)
- Particle Correlations and Fluctuations (2)
- Particle and resonance production (2)
- Particle correlations and fluctuations (2)
- QCD (2)
- aging (2)
- alpha power (2)
- risk factors (2)
- white matter hyperintensity (2)
- ALICE detector (1)
- Accelerators & Beams (1)
- Accelerators & storage rings (1)
- Aging (1)
- Alpha power (1)
- Alternative splicing (1)
- Anatomic competence (1)
- Anti-nuclei (1)
- Antiviral therapy (1)
- Arthroscopy (1)
- Atmospheric chemistry (1)
- Atomic & molecular beams (1)
- Atomic, Molecular & Optical (1)
- Beam loss (1)
- Bone diseases, Metabolic (1)
- Boosted Jets (1)
- Brain metastasis (1)
- Breast cancer (1)
- CD74 (1)
- CT dual-energy computed tomography (1)
- CVD biomarker (1)
- CXCR4 (1)
- Cancer detection and diagnosis (1)
- Cancer genomics (1)
- Canopy height model (1)
- Cardiovascular diseases (1)
- Charge-transfer collisions (1)
- Chronic hepatitis (1)
- Circular accelerators (1)
- Cirrhosis (1)
- Clinical frailty scale (1)
- Coagulation (1)
- Collective Flow, (1)
- Communicable diseases (1)
- Computational models (1)
- Critical pathway (1)
- Crohn’s disease (1)
- Data sharing (1)
- Diagnostic markers (1)
- Diagnostic techniques and procedures (1)
- Dual-energy computed tomography (1)
- Education (1)
- Electron-pion identification (1)
- Electronic transitions (1)
- Electroweak interaction (1)
- Energy modelling (1)
- European Union (1)
- Fibre/foam sandwich radiator (1)
- Frailty (1)
- Genetic causes of cancer (1)
- Genetic testing (1)
- Germany (1)
- HLA class II (1)
- HLA peptidome (1)
- HNSCC (1)
- Hadron-Hadron Scattering Heavy (1)
- Hadron-hadron interactions (1)
- Hard Scattering (1)
- Head and neck cancer (1)
- Health risk analysis (1)
- Heavy Ion Experiment (1)
- Heavy Ions (1)
- Hepatitis C virus (1)
- Histology (1)
- Human genetics (1)
- Immunology (1)
- Infection control (1)
- Inflammation (1)
- Intensive care outcome (1)
- Ionisation energy loss (1)
- Italy (1)
- Jet Physics (1)
- Jet Substructure (1)
- Knee joint (1)
- LHC (1)
- Loco-regional control (1)
- Low & intermediate-energy accelerators (1)
- Machine learning (1)
- Material budget (1)
- Mechanisms of disease (1)
- Medical (1)
- Medical education (1)
- Mortality (1)
- Multi-Parton Interactions (1)
- Multi-wire proportional drift chamber (1)
- Musculoskeletal ultrasound (1)
- Myocardial infarction (1)
- Myocardial injury (1)
- NOD2 (1)
- Neural network (1)
- Nuclear astrophysics (1)
- Nuclear physics of explosive environments (1)
- Nuclear reactions (1)
- Open data (1)
- Open source (1)
- Osteoporotic fractures (1)
- Ovarian cancer (1)
- Particle and Resonance Production (1)
- Patient isolation (1)
- Pb–Pb collisions (1)
- Phantoms (imaging) (1)
- Photon counting (1)
- Postoperative radiochemotherapy (1)
- Prognostic (1)
- Properties of Hadrons (1)
- Protease inhibitor therapy (1)
- Quark Deconfinement (1)
- Quark Gluon Plasma (1)
- Quark Production (1)
- Quark gluon plasma (1)
- Quarkonium (1)
- RNA (1)
- RNA-binding proteins (1)
- Radiative capture (1)
- Radiomics (1)
- Randomized controlled trial (1)
- Relativistic heavy-ion collisions (1)
- Respiratory signs and symptoms (1)
- Resting-state (1)
- Reverse transcription polymerase chain reaction (1)
- SARS-CoV-2 (1)
- SDF-1 (1)
- Shoulder joint (1)
- Specimen preparation and treatment (1)
- Stroke (1)
- Students (1)
- Sweden (1)
- TR (1)
- Tomography (x-ray computed) (1)
- Tracking (1)
- Transition radiation detector (1)
- Translational research (1)
- Trauma (1)
- Trichuris suis ova (1)
- Trigger (1)
- Tumor infiltrating lymphocytes (1)
- UAV (1)
- VIP1 (1)
- Validation (1)
- Vector Boson Production (1)
- Viral load (1)
- White matter hyperintensity (1)
- X-ray crystallography (1)
- Xenon-based gas mixture (1)
- amino acids (1)
- aortic stenosis (1)
- cardiac remodeling (1)
- clinical immunology (1)
- dE/dx (1)
- detector (1)
- drone (1)
- experimental results (1)
- fine spatial resolution remote sensing (1)
- global change (1)
- habitat destruction (1)
- heart failure (1)
- heavy ion experiments (1)
- helminths (1)
- image-based risk modelling (1)
- immunosuppression (1)
- infection (1)
- innate immunity (1)
- land use (1)
- lymphocytes (1)
- machine learning (1)
- mortality risk (1)
- neutralizing antibodies (1)
- personalised therapy (1)
- plant height (1)
- pneumocystis (1)
- quark gluon plasma (1)
- radiation oncology (1)
- radiomic (1)
- rats (1)
- renal transplantation (1)
- resting-state (1)
- risk factor progression (1)
- spike protein (1)
- structure-from-motion photogrammetry (1)
- survival (1)
- transplantation (1)
- variants of concern (1)
- x-ray techniques (1)
Institute
- Physik (810)
- Frankfurt Institute for Advanced Studies (FIAS) (750)
- Informatik (715)
- Medizin (28)
- Geowissenschaften (7)
- ELEMENTS (6)
- Geowissenschaften / Geographie (5)
- Biodiversität und Klima Forschungszentrum (BiK-F) (4)
- Informatik und Mathematik (3)
- Senckenbergische Naturforschende Gesellschaft (3)
We present results on transverse momentum (pT) and rapidity (y) differential production cross sections, mean transverse momentum and mean transverse momentum square of inclusive J/ψ and ψ(2S) at forward rapidity (2.5<y<4) as well as ψ(2S)-to-J/ψ cross section ratios. These quantities are measured in pp collisions at center of mass energies s√=5.02 and 13 TeV with the ALICE detector. Both charmonium states are reconstructed in the dimuon decay channel, using the muon spectrometer. A comprehensive comparison to inclusive charmonium cross sections measured at s√=2.76, 7 and 8 TeV is performed. A comparison to non-relativistic quantum chromodynamics and fixed-order next-to-leading logarithm calculations, which describe prompt and non-prompt charmonium production respectively, is also presented. A good description of the data is obtained over the full pT range, provided that both contributions are summed. In particular, it is found that for pT>15 GeV/c the non-prompt contribution reaches up to 50% of the total charmonium yield.
We present a study of the inclusive charged-particle transverse momentum (pT) spectra as a function of charged-particle multiplicity density at mid-pseudorapidity, dNch/dη, in pp collisions at s√=5.02 and 13 TeV covering the kinematic range |η|<0.8 and 0.15<pT<20GeV/c. The results are presented for events with at least one charged particle in |η|<1 (INEL >0). The transverse momentum spectra are reported for two multiplicity estimators covering different pseudorapidity regions. While the pT spectra exhibit a strong dependence on multiplicity and center-of-mass energy, they show little energy dependence when normalized to the pT spectrum for INEL >0. The behavior of the multiplicity dependent spectra from intermediate to high transverse momentum (6<pT<20GeV/c) is parametrised by the exponent of a power-law function. Going from low to high average charged-particle density, the exponent decreases from ∼6 to ∼5. Moreover, the high-pT yields of charged particles increase faster than the charged-particle multiplicity density. The average pT as a function of multiplicity and transverse spherocity is reported for pp collisions at s√=13 TeV. For low- (high-) spherocity events, corresponding to jet-like (isotropic) events, the average pT is higher (smaller) than that measured in INEL >0 pp collisions. Within uncertainties, the functional form of ⟨pT⟩(Nch) is not affected by the spherocity selection. While EPOS LHC gives a good description of many features of data, PYTHIA overestimates the average pT in jet-like events. The observations are discussed in terms of multi-parton interactions with large momentum transfer and color reconnection.
We present a study of the inclusive charged-particle transverse momentum (pT) spectra as a function of charged-particle multiplicity density at mid-pseudorapidity, dNch/dη, in pp collisions at s√ = 5.02 and 13 TeV covering the kinematic range |η|<0.8 and 0.15<pT<20 GeV/c. The results are presented for events with at least one charged particle in |η|<1 (INEL>0). The pT spectra are reported for two multiplicity estimators covering different pseudorapidity regions. The pT spectra normalized to that for INEL >0 show little energy dependence. Moreover, the high-pT yields of charged particles increase faster than the charged-particle multiplicity density. The average pT as a function of multiplicity and transverse spherocity is reported for pp collisions at s√=13 TeV. For low- (high-) spherocity events, corresponding to jet-like (isotropic) events, the average pT is higher (smaller) than that measured in INEL >0 pp collisions. Within uncertainties, the functional form of ⟨pT⟩(Nch) is not affected by the spherocity selection. While EPOS LHC gives a good description of many features of data, PYTHIA overestimates the average pT in jet-like events.
One of the key challenges for nuclear physics today is to understand from first principles the effective interaction between hadrons with different quark content. First successes have been achieved using techniques that solve the dynamics of quarks and gluons on discrete space-time lattices. Experimentally, the dynamics of the strong interaction have been studied by scattering hadrons off each other. Such scattering experiments are difficult or impossible for unstable hadrons and so high-quality measurements exist only for hadrons containing up and down quarks. Here we demonstrate that measuring correlations in the momentum space between hadron pairs produced in ultrarelativistic proton-proton collisions at the CERN Large Hadron Collider (LHC) provides a precise method with which to obtain the missing information on the interaction dynamics between any pair of unstable hadrons. Specifically, we discuss the case of the interaction of baryons containing strange quarks (hyperons). We demonstrate how, using precision measurements of p-omega baryon correlations, the effect of the strong interaction for this hadron-hadron pair can be studied with precision similar to, and compared with, predictions from lattice calculations. The large number of hyperons identified in proton-proton collisions at the LHC, together with an accurate modelling of the small (approximately one femtometre) inter-particle distance and exact predictions for the correlation functions, enables a detailed determination of the short-range part of the nucleon-hyperon interaction.
One of the big challenges for nuclear physics today is to understand, starting from first principles, the effective interaction between hadrons with different quark content. First successes have been achieved utilizing techniques to solve the dynamics of quarks and gluons on discrete space-time lattices. Experimentally, the dynamics of the strong interaction have been studied by scattering hadrons off each other. Such scattering experiments are difficult or impossible for unstable hadrons and hence, high quality measurements exist only for hadrons containing up and down quarks. In this work, we demonstrate that measuring correlations in the momentum space between hadron pairs produced in ultrarelativistic proton–proton collisions at the CERN LHC provides a precise method to obtain the missing information on the interaction dynamics between any pair of unstable hadrons. Specifically, we discuss the case of the interaction of baryons containing strange quarks (hyperons). We demonstrate for the first time how, using precision measurements of p–Ω− correlations, the effect of the strong interaction for this hadron–hadron pair can be studied and compared with predictions from lattice calculations.
This Letter presents the measurement of near-side associated per-trigger yields, denoted ridge yields, from the analysis of angular correlations of charged hadrons in proton-proton collisions at s√ = 13 TeV. Long-range ridge yields are extracted for pairs of charged particles with a pseudorapidity difference of 1.4<|Δη|<1.8 and a transverse momentum of 1<pT<2 GeV/c, as a function of the charged-particle multiplicity measured at midrapidity. This study extends the measurements of the ridge yield to the low multiplicity region, where in hadronic collisions it is typically conjectured that a strongly-interacting medium is unlikely to be formed. The precision of the new results allows for the first direct quantitative comparison with the results obtained in e+e− collisions at s√ = 91 GeV, where initial-state effects such as pre-equilibrium dynamics and collision geometry are not expected to play a role. In the multiplicity range where the e+e− results have good precision, the measured ridge yields in pp collisions are substantially larger than the limits set in e+e− annihilations. Consequently, the findings presented in this Letter suggest that the processes involved in e+e− annihilations do not contribute significantly to the emergence of long-range correlations in pp collisions.
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).
Transverse momentum (pT ) spectra of charged particles at mid-pseudorapidity in Xe–Xe collisions at √sNN=5.44TeV measured with the ALICE apparatus at the Large Hadron Collider are reported. The kinematic range 0.15<pT<50GeV/c and |η|<0.8 is covered. Results are presented in nine classes of collision centrality in the 0–80% range. For comparison, a pp reference at the collision energy of √s=5.44 TeV is obtained by interpolating between existing pp measurements at √s=5.02 and 7 TeV. The nuclear modification factors in central Xe–Xe collisions and Pb–Pb collisions at a similar center-of-mass energy of √sNN=5.02 TeV, and in addition at 2.76 TeV, at analogous ranges of charged particle multiplicity density 〈dNch/dη〉 show a remarkable similarity at pT>10 GeV/c. The centrality dependence of the ratio of the average transverse momentum 〈pT〉 in Xe–Xe collisions over Pb–Pb collision at √s=5.02 TeV is compared to hydrodynamical model calculations.
The elliptic flow (v2) of (anti-)3He is measured in Pb–Pb collisions at √sNN=5.02TeV in the transverse-momentum (pT) range of 2–6 GeV/c for the centrality classes 0–20%, 20–40%, and 40–60% using the event-plane method. This measurement is compared to that of pions, kaons, and protons at the same center-of-mass energy. A clear mass ordering is observed at low pT, as expected from relativistic hydrodynamics. The violation of the scaling of v2 with the number of constituent quarks at low pT, already observed for identified hadrons and deuterons at LHC energies, is confirmed also for (anti-)3He. The elliptic flow of (anti-)3He is underestimated by the Blast-Wave model and overestimated by a simple coalescence approach based on nucleon scaling. The elliptic flow of (anti-)3He measured in the centrality classes 0–20% and 20–40% is well described by a more sophisticated coalescence model where the phase-space distributions of protons and neutrons are generated using the iEBE-VISHNU hybrid model with AMPT initial conditions.
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.