Refine
Year of publication
Document Type
- Preprint (539)
- Article (309)
- Working Paper (1)
Language
- English (849)
Has Fulltext
- yes (849)
Is part of the Bibliography
- no (849)
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)
- Jets (3)
- Jets and Jet Substructure (3)
- polytrauma (3)
- Antimicrobial treatment (2)
- Biofilm (2)
- Bone density (2)
- CRM (2)
- Complications (2)
- Computed tomography (2)
- Deep brain stimulation (2)
- Experimental nuclear physics (2)
- Experimental particle physics (2)
- Heavy Quark Production (2)
- Lepton-Nucleon Scattering (experiments) (2)
- Low-virulent infection (2)
- Machine learning (2)
- Osteoporosis (2)
- Particle Correlations and Fluctuations (2)
- Particle and resonance production (2)
- Particle correlations and fluctuations (2)
- Prostate cancer (2)
- QCD (2)
- Sonication (2)
- Trauma (2)
- stroke (2)
- ALICE detector (1)
- Accelerators & Beams (1)
- Accelerators & storage rings (1)
- Anterior cruciate ligament (1)
- Anti-nuclei (1)
- Artificial intelligence (1)
- Atomic & molecular beams (1)
- Atomic, Molecular & Optical (1)
- BESIII (1)
- BPH (1)
- BPO (1)
- Beam loss (1)
- Biomarker (1)
- Biomarkers (1)
- Bipolar disorder (1)
- Bone disease (1)
- Bone diseases (1)
- Boosted Jets (1)
- Breast cancer (1)
- Burden of illness (1)
- Cancer detection and diagnosis (1)
- Charge-transfer collisions (1)
- Circadian (1)
- Circular accelerators (1)
- Clinical frailty scale (1)
- Collective Flow, (1)
- Conservation biogeography (1)
- D-Galacturonicacid (1)
- Diagnostic markers (1)
- Electromagnetic form factors (1)
- Electron-pion identification (1)
- Electronic transitions (1)
- Electroweak interaction (1)
- Enzymatic hydrolysis (1)
- Epilepsy (1)
- Experimental models of disease (1)
- Extracted sugar beet press pulp (1)
- Fibre/foam sandwich radiator (1)
- Frailty (1)
- G protein-coupled receptor (GPCR) (1)
- Genetic causes of cancer (1)
- Genetic testing (1)
- Genetic wildlife monitoring (1)
- HOLEP (1)
- Hadron-Hadron Scattering Heavy (1)
- Hadron-hadron interactions (1)
- Hair sampling (1)
- Hard Scattering (1)
- Healthcare costs (1)
- Healthcare resource utilisation (1)
- Heavy Ion Experiment (1)
- Heavy Ions (1)
- Histology (1)
- Human genetics (1)
- IPSS (1)
- IgGAM (1)
- Inflammation (1)
- Initial state radiation (1)
- Intensive care outcome (1)
- Ionisation energy loss (1)
- Jet Physics (1)
- Jet Substructure (1)
- Knee joint (1)
- L-Galactonate (1)
- LHC (1)
- LTB4 (1)
- Lee type, functional outcome (1)
- Lee-type (1)
- Leukotriene (1)
- Low & intermediate-energy accelerators (1)
- Lung failure (1)
- Lure sticks (1)
- Magnetic resonance Imaging (1)
- Material budget (1)
- Membrane protein (1)
- Metabolic (1)
- Metabolic engineering (1)
- Multi-Parton Interactions (1)
- Multi-wire proportional drift chamber (1)
- Multidetector computed tomography (1)
- Multiparametric MRI (1)
- Nanodisc (1)
- Neural network (1)
- Noninvasive genetic sampling (1)
- Nuclear astrophysics (1)
- Nuclear physics of explosive environments (1)
- Nuclear reactions (1)
- ORP (1)
- Oncology (1)
- Osteoporotic fractures (1)
- Ovarian cancer (1)
- Oxidoreductases (1)
- PAD-test (1)
- PSA (1)
- Particle and Resonance Production (1)
- Pb–Pb collisions (1)
- Pectin (1)
- Pentaglobin (1)
- Peritonitis (1)
- Personalized medicine (1)
- Photon counting (1)
- Posterior cruciate ligament (1)
- Prediction (1)
- Prevalence (1)
- Properties of Hadrons (1)
- Proton (1)
- Pseudarthrosis (1)
- Psychiatry (1)
- Quantitative features (1)
- Quark Deconfinement (1)
- Quark Gluon Plasma (1)
- Quark Production (1)
- Quark gluon plasma (1)
- Quarkonium (1)
- RARP (1)
- Radiative capture (1)
- Radiomics (1)
- Relativistic heavy-ion collisions (1)
- Resonance assignment (1)
- Respiratory signs and symptoms (1)
- Saccharomyces cerevisiae (1)
- Seasonal variation (1)
- Sepsis (1)
- Severe bacterial infection (1)
- Solar insolation (1)
- Solution-state NMR (1)
- Statistical analysis (1)
- Ste2p (1)
- Suicide (1)
- Sunlight (1)
- TLR (1)
- TR (1)
- Topology (1)
- Tracking (1)
- Transition radiation detector (1)
- Translational research (1)
- Trigger (1)
- Tuberous sclerosis complex (1)
- VIP1 (1)
- Vector Boson Production (1)
- Xenon-based gas mixture (1)
- adverse events (1)
- allogeneic stem cell transplant (1)
- antibiotic resistance (1)
- apex (1)
- bloodstream infections (1)
- bundle (1)
- cell-free DNA – cfDNA (1)
- chemotherapy (1)
- complications (1)
- dE/dx (1)
- detector (1)
- emergency care (1)
- experimental results (1)
- extremity (1)
- fixation (1)
- functional outcome (1)
- fusion biopsy (1)
- heavy ion experiments (1)
- hematoma (1)
- intensive care admission and mortality (1)
- local inflammation (1)
- lymphocyte (1)
- membrane protein (1)
- membranous urethra (1)
- mid-term urinary continence (1)
- monocytes (1)
- muscle (1)
- neuroinflammation (1)
- neurophysiology (1)
- nuclear magnetic resonance (NMR) (1)
- pain therapy (1)
- pediatric patients (1)
- phagocytes (1)
- pig (1)
- pigs (1)
- porcine (1)
- prevention (1)
- prostate cancer (1)
- protein folding (1)
- quark gluon plasma (1)
- radical prostatectomy (1)
- regulatory T cell (1)
- simulation (1)
- simulation training (1)
- sports medicine (1)
- structural biology (1)
- surgery (1)
- sympathetic maintained pain (1)
- systematic biopsy (1)
- thrombolysis (1)
- thrombolysis (tPA) (1)
- training (1)
- vegetative nervous system (1)
- x-ray techniques (1)
Institute
The transverse momentum (pT) differential production cross section of the promptly-produced charm-strange baryon Ξ0c (and its charge conjugate Ξ0c¯¯¯¯¯¯) is measured at midrapidity via its hadronic decay into π+Ξ− in p−Pb collisions at a centre-of-mass energy per nucleon−nucleon collision sNN−−−√ = 5.02 TeV with the ALICE detector at the LHC. The Ξ0c nuclear modification factor (RpPb), calculated from the cross sections in pp and p−Pb collisions, is presented and compared with the RpPb of Λ+c baryons. The ratios between the pT-differential production cross section of Ξ0c baryons and those of D0 mesons and Λ+c baryons are also reported and compared with results at forward and backward rapidity from the LHCb Collaboration. The measurements of the production cross section of prompt Ξ0c baryons are compared with a model based on perturbative QCD calculations of charm-quark production cross sections, which includes only cold nuclear matter effects in p−Pb collisions, and underestimates the measurement by a factor of about 50. This discrepancy is reduced when the data is compared with a model in which hadronisation is implemented via quark coalescence. The pT-integrated cross section of prompt Ξ0c-baryon production at midrapidity extrapolated down to pT = 0 is also reported. These measurements offer insights and constraints for theoretical calculations of the hadronisation process. Additionally, they provide inputs for the calculation of the charm production cross section in p−Pb collisions at midrapidity.
Investigating strangeness enhancement with multiplicity in pp collisions using angular correlations
(2024)
A study of strange hadron production associated with hard scattering processes and with the underlying event is conducted to investigate the origin of the enhanced production of strange hadrons in small collision systems characterised by large charged-particle multiplicities. For this purpose, the production of the single-strange meson K0S and the double-strange baryon Ξ± is measured, in each event, in the azimuthal direction of the highest-pT particle (``trigger" particle), related to hard scattering processes, and in the direction transverse to it in azimuth, associated with the underlying event, in pp collisions at s√=5.02 TeV and s√=13 TeV using the ALICE detector at the LHC. The per-trigger yields of K0S and Ξ± are dominated by the transverse-to-leading production (i.e., in the direction transverse to the trigger particle), whose contribution relative to the toward-leading production is observed to increase with the event charged-particle multiplicity. The transverse-to-leading and the toward-leading Ξ±/K0S yield ratios increase with the multiplicity of charged particles, suggesting that strangeness enhancement with multiplicity is associated with both hard scattering processes and the underlying event. The relative production of Ξ± with respect to K0S is higher in transverse-to-leading processes over the whole multiplicity interval covered by the measurement. The K0S and Ξ± per-trigger yields and yield ratios are compared with predictions of three different phenomenological models, namely PYTHIA 8.2 with the Monash tune, PYTHIA 8.2 with ropes and EPOS LHC. The comparison shows that none of them can quantitatively describe either the transverse-to-leading or the toward-leading yields of K0S and Ξ±.
The first measurement of the impact-parameter dependent angular anisotropy in the decay of coherently photoproduced ρ0 mesons is presented. The ρ0 mesons are reconstructed through their decay into a pion pair. The measured anisotropy corresponds to the amplitude of the cos(2ϕ) modulation, where ϕ is the angle between the two vectors formed by the sum and the difference of the transverse momenta of the pions, respectively. The measurement was performed by the ALICE Collaboration at the LHC using data from ultraperipheral Pb−Pb collisions at a center-of-mass energy of sNN−−−√ = 5.02 TeV per nucleon pair. Different impact-parameter regions are selected by classifying the events in nuclear-breakup classes. The amplitude of the cos(2ϕ) modulation is found to increase by about one order of magnitude from large to small impact parameters. Theoretical calculations, which describe the measurement, explain the cos(2ϕ) anisotropy as the result of a quantum interference effect at the femtometer scale that arises from the ambiguity as to which of the nuclei is the source of the photon in the interaction.
Particle production as a function of charged-particle flattenicity in pp collisions at √s = 13 TeV
(2024)
This paper reports the first measurement of the transverse momentum (pT) spectra of primary charged pions, kaons, (anti)protons, and unidentified particles as a function of the charged-particle flattenicity in pp collisions at s√=13 TeV. Flattenicity is a novel event shape observable that is measured in the pseudorapidity intervals covered by the V0 detector, 2.8<η<5.1 and −3.7<η<−1.7. According to QCD-inspired phenomenological models, it shows sensitivity to multiparton interactions and is less affected by biases towards larger pT due to local multiplicity fluctuations in the V0 acceptance than multiplicity. The analysis is performed in minimum-bias (MB) as well as in high-multiplicity events up to pT=20 GeV/c. The event selection requires at least one charged particle produced in the pseudorapidity interval |η|<1. The measured pT distributions, average pT, kaon-to-pion and proton-to-pion particle ratios, presented in this paper, are compared to model calculations using PYTHIA 8 based on color strings and EPOS LHC. The modification of the pT-spectral shapes in low-flattenicity events that have large event activity with respect to those measured in MB events develops a pronounced peak at intermediate pT (2<pT<8 GeV/c), and approaches the vicinity of unity at higher pT. The results are qualitatively described by PYTHIA, and they show different behavior than those measured as a function of charged-particle multiplicity based on the V0M estimator.
Measurement of beauty production via non-prompt charm hadrons in p-Pb collisions at √sNN = 5.02 TeV
(2024)
The production cross sections of D0, D+, and Λ+c hadrons originating from beauty-hadron decays (i.e. non-prompt) were measured for the first time at midrapidity in proton−lead (p−Pb) collisions at the center-of-mass energy per nucleon pair of √sNN=5.02 TeV. Nuclear modification factors (RpPb) of non-prompt D0, D+, and Λ+c are calculated as a function of the transverse momentum (pT) to investigate the modification of the momentum spectra measured in p−Pb collisions with respect to those measured in proton−proton (pp) collisions at the same energy. The RpPb measurements are compatible with unity and with the measurements in the prompt charm sector, and do not show a significant pT dependence. The pT-integrated cross sections and pT-integrated RpPb of non-prompt D0 and D+ mesons are also computed by extrapolating the visible cross sections down to pT = 0. The non-prompt D-meson RpPb integrated over pT is compatible with unity and with model calculations implementing modification of the parton distribution functions of nucleons bound in nuclei with respect to free nucleons. The non-prompt Λ+c/D0 and D+/D0 production ratios are computed to investigate hadronisation mechanisms of beauty quarks into mesons and baryons. The measured ratios as a function of pT display a similar trend to that measured for charm hadrons in the same collision system.
The production yields of antideuterons and antiprotons are measured in pp collisions at a center-of-mass energy of √s=13 TeV, as a function of transverse momentum (pT) and rapidity (y), for the first time up to |y|=0.7. The measured spectra are used to study the pT and rapidity dependence of the coalescence parameter B2, which quantifies the coalescence probability of antideuterons. The pT and rapidity dependence of the obtained B2 is extrapolated for pT>1.7 GeV/c and |y|>0.7 using the phenomenological antideuteron production model implemented in PYTHIA 8.3 as well as a baryon coalescence afterburner model based on EPOS 3. Such measurements are of interest to the astrophysics community, since they can be used for the calculation of the flux of antinuclei from cosmic rays, in combination with coalescence models.
The production cross section of inclusive isolated photons has been measured by the ALICE experiment at the CERN LHC in pp collisions at centre-of-momentum energy of s√=13 TeV collected during the LHC Run 2 data-taking period. The measurement is performed by combining the measurements of the electromagnetic calorimeter EMCal and the central tracking detectors ITS and TPC, covering a pseudorapidity range of |ηγ|<0.67 and a transverse momentum range of 7<pγT<200 GeV/c. The result extends to lower pγT and xγT=2pγT/s√ ranges, the lowest xγT of any isolated photon measurements to date, extending significantly those measured by the ATLAS and CMS experiments towards lower pγT at the same collision energy with a small overlap between the measurements. The measurement is compared with next-to-leading order perturbative QCD calculations and the results from the ATLAS and CMS experiments as well as with measurements at other collision energies. The measurement and theory prediction are in agreement with each other within the experimental and theoretical uncertainties.
Objectives: To analyze the performance of radiological assessment categories and quantitative computational analysis of apparent diffusion coefficient (ADC) maps using variant machine learning algorithms to differentiate clinically significant versus insignificant prostate cancer (PCa). Methods: Retrospectively, 73 patients were included in the study. The patients (mean age, 66.3 ± 7.6 years) were examined with multiparametric MRI (mpMRI) prior to radical prostatectomy (n = 33) or targeted biopsy (n = 40). The index lesion was annotated in MRI ADC and the equivalent histologic slides according to the highest Gleason Grade Group (GrG). Volumes of interest (VOIs) were determined for each lesion and normal-appearing peripheral zone. VOIs were processed by radiomic analysis. For the classification of lesions according to their clinical significance (GrG ≥ 3), principal component (PC) analysis, univariate analysis (UA) with consecutive support vector machines, neural networks, and random forest analysis were performed. Results: PC analysis discriminated between benign and malignant prostate tissue. PC evaluation yielded no stratification of PCa lesions according to their clinical significance, but UA revealed differences in clinical assessment categories and radiomic features. We trained three classification models with fifteen feature subsets. We identified a subset of shape features which improved the diagnostic accuracy of the clinical assessment categories (maximum increase in diagnostic accuracy ΔAUC = + 0.05, p < 0.001) while also identifying combinations of features and models which reduced overall accuracy. Conclusions: The impact of radiomic features to differentiate PCa lesions according to their clinical significance remains controversial. It depends on feature selection and the employed machine learning algorithms. It can result in improvement or reduction of diagnostic performance.
Long- and short-range correlations for pairs of charged particles are studied via two-particle angular correlations in pp collisions at √sNN = 13 TeV and p–Pb collisions at √s = 5.02 TeV. The correlation functions are measured as a function of relative azimuthal angle ∆φ and pseudorapidity separation ∆η for pairs of primary charged particles within the pseudorapidity interval |η| < 0.9 and the transverse-momentum interval 1 < pT < 4 GeV/c. Flow coefficients are extracted for the long-range correlations (1.6 < |∆η| < 1.8) in various high-multiplicity event classes using the low-multiplicity template fit method. The method is used to subtract the enhanced yield of away-side jet fragments in high-multiplicity events. These results show decreasing flow signals toward lower multiplicity events. Furthermore, the flow coefficients for events with hard probes, such as jets or leading particles, do not exhibit any significant changes compared to those obtained from high-multiplicity events without any specific event selection criteria. The results are compared with hydrodynamic-model calculations, and it is found that a better understanding of the initial conditions is necessary to describe the results, particularly for low-multiplicity events.
The production of K∗(892)± meson resonance is measured at midrapidity (|y|<0.5) in Pb-Pb collisions at sNN−−−√=5.02 TeV using the ALICE detector at the LHC. The resonance is reconstructed via its hadronic decay channel K∗(892)±→K0Sπ±. The transverse momentum distributions are obtained for various centrality intervals in the pT range of 0.4-16 GeV/c. The reported measurements of integrated yields, mean transverse momenta, and particle yield ratios are consistent with previous ALICE measurements for K∗(892)0. The pT-integrated yield ratio 2K∗(892)±/(K++K−) in central Pb-Pb collisions shows a significant suppression (9.3σ) relative to pp collisions. Thermal model calculations overpredict the particle yield ratio. Although both simulations consider the hadronic phase, only HRG-PCE accurately represents the measurements, whereas MUSIC+SMASH tends to overpredict them. These observations, along with the kinetic freeze-out temperatures extracted from the yields of light-flavored hadrons using the HRG-PCE model, indicate a finite hadronic phase lifetime, which increases towards central collisions. The pT-differential yield ratios 2K∗(892)±/(K++K−) and 2K∗(892)±/(π++π−) are suppressed by up to a factor of five at pT<2 GeV/c in central Pb-Pb collisions compared to pp collisions at s√= 5.02 TeV. Both particle ratios and are qualitatively consistent with expectations for rescattering effects in the hadronic phase. The nuclear modification factor shows a smooth evolution with centrality and is below unity at pT>8 GeV/c, consistent with measurements for other light-flavored hadrons. The smallest values are observed in most central collisions, indicating larger energy loss of partons traversing the dense medium.