Refine
Year of publication
Document Type
- Preprint (559)
- Article (383)
- Working Paper (2)
Has Fulltext
- yes (944)
Is part of the Bibliography
- no (944)
Keywords
- Heavy Ion Experiments (21)
- Hadron-Hadron scattering (experiments) (11)
- Hadron-Hadron Scattering (10)
- Heavy-ion collision (5)
- Jets (5)
- Atmospheric chemistry (4)
- Collective Flow (4)
- Quark-Gluon Plasma (4)
- Burden of illness (3)
- Healthcare costs (3)
- Heavy Quark Production (3)
- Jets and Jet Substructure (3)
- Prevalence (3)
- Artificial intelligence (2)
- Atmospheric science (2)
- Climate change (2)
- Experimental nuclear physics (2)
- Experimental particle physics (2)
- Healthcare resource utilization (2)
- Lepton-Nucleon Scattering (experiments) (2)
- Machine learning (2)
- Oncology (2)
- Particle Correlations and Fluctuations (2)
- Particle and resonance production (2)
- Particle correlations and fluctuations (2)
- QCD (2)
- Quark Gluon Plasma (2)
- Quarkonium (2)
- Radiomics (2)
- Rescue medication (2)
- Shell model (2)
- brain metastases (2)
- breast cancer (2)
- ALICE detector (1)
- ATR-FTIR (1)
- Analysis and statistical methods (1)
- Anti-nuclei (1)
- Antidepressant (1)
- B cell receptor (1)
- BCL2 (1)
- BCR-ABL (1)
- BPH (1)
- BPO (1)
- Biogeochemistry (1)
- Biomarker (1)
- Bipolar disorder (1)
- Boosted Jets (1)
- Breast cancer (1)
- CLOUD experiment (1)
- COVID-19 (1)
- CTLA-4 (1)
- CaMPARI (1)
- Calorimeters (1)
- Cancer detection and diagnosis (1)
- Circadian (1)
- Climate-change impacts (1)
- Coagulation (1)
- Collective Flow, (1)
- Cost-effectiveness (1)
- Critical care (1)
- Data processing methods (1)
- Depression (1)
- Direct reactions (1)
- Dravet syndrome (1)
- Drug screens (1)
- Electron-pion identification (1)
- Electroweak interaction (1)
- Epilepsy (1)
- Fibre/foam sandwich radiator (1)
- Genetic causes of cancer (1)
- Genetic testing (1)
- HNSCC (1)
- HOLEP (1)
- HPV-positive OPSCC (1)
- Hadron-Hadron Scattering Heavy (1)
- Hadron-hadron interactions (1)
- Hard Scattering (1)
- Health technology assessment (1)
- Healthcare resource utilisation (1)
- Heavy Ion Experiment (1)
- Heavy Ions (1)
- Heavy-Ion Collision (1)
- Hematology (1)
- High-energy neutron detection (1)
- Histology (1)
- Human genetics (1)
- IPSS (1)
- Inflammation (1)
- Intensive care (1)
- Inverse kinematics (1)
- Ion channels in the nervous system (1)
- Ionisation energy loss (1)
- Jet Physics (1)
- Jet Substructure (1)
- KIF (1)
- KIF11 (1)
- LHC (1)
- Lee type, functional outcome (1)
- Lee-type (1)
- Lennox-Gastaut syndrome (1)
- Leukemias (1)
- Loco-regional control (1)
- Material budget (1)
- Mechanical ventilation (1)
- Molecular neuroscience (1)
- Mortality (1)
- Multi-Parton Interactions (1)
- Multi-neutron detection (1)
- Multi-wire proportional drift chamber (1)
- Multiparametric MRI (1)
- Multiphoton microscopy (1)
- Myocardial injury (1)
- NCH93 (1)
- Neural network (1)
- Nuclear reactions (1)
- Nuclear structure & decays (1)
- Nucleon induced nuclear reactions (1)
- ORP (1)
- Optogenetics (1)
- Ovarian cancer (1)
- PAD-test (1)
- PD-1 (1)
- PSA (1)
- Particle and Resonance Production (1)
- Pb–Pb collisions (1)
- Performance of High Energy Physics Detectors (1)
- Plastic scintillator array (1)
- Prediction (1)
- Primary care (1)
- Properties of Hadrons (1)
- Prostate cancer (1)
- Psychiatry (1)
- Quark Deconfinement (1)
- Quark Production (1)
- Quark gluon plasma (1)
- Quasi-free scattering (1)
- RARP (1)
- Reactions with relativistic radioactive beams (1)
- Relativistic heavy-ion collisions (1)
- Seasonal variation (1)
- Solar insolation (1)
- Spectroscopic factors (1)
- Spectroscopic factors & electromagnetic moments (1)
- Suicide (1)
- Sunlight (1)
- TR (1)
- Thermodynamics (1)
- Tracking (1)
- Transition radiation detector (1)
- Treatment (1)
- Trigger (1)
- Tuberous sclerosis complex (1)
- Validation (1)
- Vector Boson Production (1)
- Xenon-based gas mixture (1)
- activation receptors (1)
- acute lymphoblastic leukaemia (1)
- aerosol formation (1)
- aerosols (1)
- allogeneic stem cell transplant (1)
- antibiotic resistance (1)
- apex (1)
- articular chondrocytes (1)
- asymptomatic (1)
- bloodstream infections (1)
- bone metabolism (1)
- bone morphogenetic proteins (BMPs) (1)
- chemical biology (1)
- chemotherapy (1)
- combined modality therapy (1)
- congenic mice (1)
- cytosolic free calcium (1)
- dE/dx (1)
- detector (1)
- deubiquitylating enzymes (1)
- double immune checkpoint inhibition (1)
- ectosomes (1)
- exosomes (1)
- experimental results (1)
- extracellular vesicles (1)
- functional outcome (1)
- fusion biopsy (1)
- gravity (1)
- guidelines (1)
- head and neck neoplasms (1)
- heavy ion experiments (1)
- hepatic osteodystrophy (1)
- high throughput screening (1)
- histone deacetylases (HDACs) (1)
- image-based risk modelling (1)
- immune checkpoint blockade (1)
- immunotherapy (1)
- induction therapy (1)
- inflammation (1)
- innate lymphoid cells (1)
- intensive care admission and mortality (1)
- intracellular trafficking (1)
- isoforms (1)
- kinesin (1)
- liver disease (1)
- liver metastasis (1)
- machine learning (1)
- mass spectrometry (1)
- membranous urethra (1)
- meningioma (1)
- metabolic syndrome (1)
- miRNA-17–92 (1)
- microparticles (1)
- microvesicles (1)
- mid-term urinary continence (1)
- minimal information requirements (1)
- nanoparticle growth (1)
- obesity (1)
- organ preservation (1)
- osteopenia (1)
- osteoporosis (1)
- packaging (1)
- parabolic flight (1)
- pediatric patients (1)
- personalised therapy (1)
- photochemistry (1)
- photopolymerization (1)
- prognostic scores (1)
- prostate cancer (1)
- proteomics (1)
- psoriasis (1)
- quark gluon plasma (1)
- radiation oncology (1)
- radical prostatectomy (1)
- radiomic (1)
- reproducibility (1)
- rigor (1)
- sclerostin (1)
- secukinumab (1)
- standardization (1)
- systematic biopsy (1)
- transforming growth factor beta (TGF-β) (1)
- treatment resistance (1)
- ubiquitin specific proteases (1)
- uveal melanoma (1)
- vitamin Dmetabolism (1)
- volatile organic compounds (1)
Institute
- Physik (860)
- Frankfurt Institute for Advanced Studies (FIAS) (790)
- Informatik (757)
- Geowissenschaften (33)
- Medizin (33)
- ELEMENTS (6)
- Geowissenschaften / Geographie (5)
- Informatik und Mathematik (4)
- Biowissenschaften (2)
- Buchmann Institut für Molekulare Lebenswissenschaften (BMLS) (2)
Mid-rapidity production of π±, K± and (p¯)p measured by the ALICE experiment at the LHC, in Pb-Pb and inelastic pp collisions at sNN−−−√ = 5.02 TeV, is presented. The invariant yields are measured over a wide transverse momentum (pT) range from hundreds of MeV/c up to 20 GeV/c. The results in Pb-Pb collisions are presented as a function of the collision centrality, in the range 0−90%. The comparison of the pT-integrated particle ratios, i.e. proton-to-pion (p/π) and kaon-to-pion (K/π) ratios, with similar measurements in Pb-Pb collisions at sNN−−−√ = 2.76 TeV show no significant energy dependence. Blast-wave fits of the pT spectra indicate that in the most central collisions radial flow is slightly larger at 5.02 TeV with respect to 2.76 TeV. Particle ratios (p/π, K/π) as a function of pT show pronounced maxima at pT ≈ 3 GeV/c in central Pb-Pb collisions. At high pT, particle ratios at 5.02 TeV are similar to those measured in pp collisions at the same energy and in Pb-Pb collisions at sNN−−−√ = 2.76 TeV. Using the pp reference spectra measured at the same collision energy of 5.02 TeV, the nuclear modification factors for the different particle species are derived. Within uncertainties, the nuclear modification factor is particle species independent for high pT and compatible with measurements at sNN−−−√ = 2.76 TeV. The results are compared to state-of-the-art model calculations, which are found to describe the observed trends satisfactorily.
This Letter presents the first direct investigation of the p-Σ0 interaction, using the femtoscopy technique in high-multiplicity pp collisions at s√ = 13 TeV measured by the ALICE detector. The Σ0 is reconstructed via the decay channel to Λγ, and the subsequent decay of Λ to pπ−. The photon is detected via the conversion in material to e+e− pairs exploiting the unique capability of the ALICE detector to measure electrons at low transverse momenta. The measured p-Σ0 correlation indicates a shallow strong interaction. The comparison of the data to several theoretical predictions obtained employing the Correlation Analysis Tool using the Schrödinger Equation (CATS) and the Lednický-Lyuboshits approach shows a reasonable agreement. The presented femtoscopic data cannot yet discriminate between different models, which is also the case for the available scattering and hypernuclei data. Nevertheless, the p-Σ0 correlation function is found to be sensitive to the strong interaction, and driven by the interplay of the different spin and isospin channels. This pioneering study demonstrates the feasibility of a femtoscopic measurement in the p-Σ0 channel and with the expected larger data samples in LHC Run 3 and Run 4, the p-Σ0 interaction will be constrained with high precision.
This Letter presents the first direct investigation of the p-Σ0 interaction, using the femtoscopy technique in high-multiplicity pp collisions at s√ = 13 TeV measured by the ALICE detector. The Σ0 is reconstructed via the decay channel to Λγ, and the subsequent decay of Λ to pπ−. The photon is detected via the conversion in material to e+e− pairs exploiting the unique capability of the ALICE detector to measure electrons at low transverse momenta. The measured p-Σ0 correlation indicates a shallow strong interaction. The comparison of the data to several theoretical predictions obtained employing the Correlation Analysis Tool using the Schrödinger Equation (CATS) and the Lednický-Lyuboshits approach shows that the current experimental precision does not yet allow to discriminate between different models, as it is the case for the available scattering and hypernuclei data. Nevertheless, the p-Σ0 correlation function is found to be sensitive to the strong interaction, and driven by the interplay of the different spin and isospin channels. This pioneering study demonstrates the feasibility of a femtoscopic measurement in the p-Σ0 channel and with the expected larger data samples in LHC Run 3 and Run 4, the p-Σ0 interaction will be constrained with high precision.
The second (v2) and third (v3) flow harmonic coefficients of J/ψ mesons are measured at forward rapidity (2.5 < y < 4.0) in Pb-Pb collisions at sNN−−−√ = 5.02 TeV with the ALICE detector at the LHC. Results are obtained with the scalar product method and reported as a function of transverse momentum, pT, for various collision centralities. A positive value of J/ψ v3 is observed with 3.7σ significance. The measurements, compared to those of prompt D0 mesons and charged particles at mid-rapidity, indicate an ordering with vn(J/ψ) <vn(D0) <vn(h±) (n = 2, 3) at low and intermediate pT up to 6 GeV/c and a convergence with v2(J/ψ) ≈v2(D0) ≈v2(h±) at high pT above 6-8 GeV/c. In semi-central collisions (5-40% and 10-50% centrality intervals) at intermediate pT between 2 and 6 GeV/c, the ratio v3/v2 of J/ψ mesons is found to be significantly lower (4.6σ) with respect to that of charged particles. In addition, the comparison to the prompt D0-meson ratio in the same pT interval suggests an ordering similar to that of the v2 and v3 coefficients. The J/ψ v2 coefficient is further studied using the Event Shape Engineering technique. The obtained results are found to be compatible with the expected variations of the eccentricity of the initial-state geometry.
Charged-particle pseudorapidity density at mid-rapidity in p–Pb collisions at √sNN = 8.16 TeV
(2018)
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, which 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.
The second (v2) and third (v3) flow harmonic coefficients of J/ψ mesons are measured at forward rapidity (2.5 < y < 4.0) in Pb-Pb collisions at sNN−−−√ = 5.02 TeV with the ALICE detector at the LHC. Results are obtained with the scalar product method and reported as a function of transverse momentum, pT, for various collision centralities. A positive value of J/ψ v3 is observed with 3.7σ significance. The measurements, compared to those of prompt D0 mesons and charged particles at mid-rapidity, indicate an ordering with vn(J/ψ) <vn(D0) <vn(h±) (n = 2, 3) at low and intermediate pT up to 6 GeV/c and a convergence with v2(J/ψ) ≈v2(D0) ≈v2(h±) at high pT above 6-8 GeV/c. In semi-central collisions (5-40% and 10-50% centrality intervals) at intermediate pT between 2 and 6 GeV/c, the ratio v3/v2 of J/ψ mesons is found to be significantly lower (4.6σ) with respect to that of charged particles. In addition, the comparison to the prompt D0-meson ratio in the same pT interval suggests an ordering similar to that of the v2 and v3 coefficients. The J/ψ v2 coefficient is further studied using the Event Shape Engineering technique. The obtained results are found to be compatible with the expected variations of the eccentricity of the initial-state geometry.
Two-particle correlations in high-energy collision experiments enable the extraction of particle source radii by using the Bose-Einstein enhancement of pion production at low relative momentum q∝1/R. It was previously observed that in pp collisions at s√=7 TeV the average pair transverse momentum kT range of such analyses is limited due to large background correlations which were attributed to mini-jet phenomena. To investigate this further, an event-shape dependent analysis of Bose-Einstein correlations for pion pairs is performed in this work. By categorizing the events by their transverse sphericity ST into spherical (ST>0.7) and jet-like (ST<0.3) events a method was developed that allows for the determination of source radii for much larger values of kT for the first time. Spherical events demonstrate little or no background correlations while jet-like events are dominated by them. This observation agrees with the hypothesis of a mini-jet origin of the non-femtoscopic background correlations and gives new insight into the physics interpretation of the kT dependence of the radii. The emission source size in spherical events shows a substantially diminished kT dependence, while jet-like events show indications of a negative trend with respect to kT in the highest multiplicity events. Regarding the emission source shape, the correlation functions for both event sphericity classes show good agreement with an exponential shape, rather than a Gaussian one.
Two-particle correlations in high-energy collision experiments enable the extraction of particle source radii by using the Bose-Einstein enhancement of pion production at low relative momentum q∝1/R. It was previously observed that in pp collisions at s√=7 TeV the average pair transverse momentum kT range of such analyses is limited due to large background correlations which were attributed to mini-jet phenomena. To investigate this further, an event-shape dependent analysis of Bose-Einstein correlations for pion pairs is performed in this work. By categorizing the events by their transverse sphericity ST into spherical (ST>0.7) and jet-like (ST<0.3) events a method was developed that allows for the determination of source radii for much larger values of kT for the first time. Spherical events demonstrate little or no background correlations while jet-like events are dominated by them. This observation agrees with the hypothesis of a mini-jet origin of the non-femtoscopic background correlations and gives new insight into the physics interpretation of the kT dependence of the radii. The emission source size in spherical events shows a substantially diminished kT dependence, while jet-like events show indications of a negative trend with respect to kT in the highest multiplicity events. Regarding the emission source shape, the correlation functions for both event sphericity classes show good agreement with an exponential shape, rather than a Gaussian one.
At the Large Hadron Collider at CERN in Geneva, Switzerland, atomic nuclei are collided at ultra-relativistic energies. Many final-state particles are produced in each collision and their properties are measured by the ALICE detector. The detector signals induced by the produced particles are digitized leading to data rates that are in excess of 48 GB/s. The ALICE High Level Trigger (HLT) system pioneered the use of FPGA- and GPU-based algorithms to reconstruct charged-particle trajectories and reduce the data size in real time. The results of the reconstruction of the collision events, available online, are used for high level data quality and detector-performance monitoring and real-time time-dependent detector calibration. The online data compression techniques developed and used in the ALICE HLT have more than quadrupled the amount of data that can be stored for offline event processing.
At the Large Hadron Collider at CERN in Geneva, Switzerland, atomic nuclei are collided at ultra-relativistic energies. Many final-state particles are produced in each collision and their properties are measured by the ALICE detector. The detector signals induced by the produced particles are digitized leading to data rates that are in excess of 48 GB/s. The ALICE High Level Trigger (HLT) system pioneered the use of FPGA- and GPU-based algorithms to reconstruct charged-particle trajectories and reduce the data size in real time. The results of the reconstruction of the collision events, available online, are used for high level data quality and detector-performance monitoring and real-time time-dependent detector calibration. The online data compression techniques developed and used in the ALICE HLT have more than quadrupled the amount of data that can be stored for offline event processing.