Refine
Year of publication
Language
- English (133)
- German (1)
- Portuguese (1)
Has Fulltext
- yes (135)
Keywords
- Hadron-Hadron Scattering (5)
- Collective Flow (3)
- ADHD (2)
- Heavy Ion Experiments (2)
- Jets (2)
- Shell model (2)
- functional genetics (2)
- AML (1)
- Adhesion (1)
- Affect (1)
- Ambulatory Assessment (1)
- Arbeitsvermittlung (1)
- BNC2 (1)
- Boosted Jets (1)
- Brain (1)
- CAKUT (1)
- CXCL12 (1)
- CXCR4 (1)
- Collective Flow, (1)
- Consensus (1)
- Course (1)
- Deutsch (1)
- Diagnosis (1)
- Direct reactions (1)
- Entomology (1)
- Genetics (1)
- Guideline (1)
- HDAC (1)
- HDACi (1)
- Hard Scattering (1)
- Heavy Quark Production (1)
- Heavy ion storage ring (1)
- Inverse kinematics (1)
- Jet Substructure (1)
- Katholischer Dienstbotenverein (1)
- Konjunktiv (1)
- Kontrastive Linguistik (1)
- LUT (1)
- MYC (1)
- Magnetic resonance imaging (1)
- Material budget (1)
- Mood (1)
- Multi-Parton Interactions (1)
- Neoplasm staging (1)
- Nuclear reactions (1)
- Nuclear structure & decays (1)
- Nucleon induced nuclear reactions (1)
- Oposterior urethral valve (1)
- Orbital electron capture (1)
- Outcome (1)
- Particle Correlations and Fluctuations (1)
- Phylogenomics (1)
- Physical activity (1)
- Population genetics (1)
- Portugiesisch (1)
- QCD (1)
- Quark Deconfinement (1)
- Quasi-free scattering (1)
- Rectal neoplasms (1)
- SLC20A1 (1)
- Single particle decay spectroscopy (1)
- Spectroscopic factors (1)
- Spectroscopic factors & electromagnetic moments (1)
- Treatment (1)
- Two body weak decay (1)
- Verein katholischer ländlicher Dienstboten für das Königreich Bayern rechts des Rheins (1909-) (1)
- WT1 (1)
- adaptation (1)
- autobiographical memory (1)
- autobiographical reasoning (1)
- basonuclin 2 (1)
- bladder exstrophy-epispadias complex (1)
- cloacae (1)
- cloacal malformation (1)
- detector (1)
- distal pronephric outlet obstruction (1)
- drug resistance (1)
- evolution (1)
- experimental results (1)
- hepatitis C virus (HCV) (1)
- indomethacin (1)
- innovative moments (1)
- integrins (1)
- kidney formation (1)
- lower urinary tract obstruction (1)
- mitochondrial antiviral signaling protein (MAVS) (1)
- molecular adaptation (1)
- molecular biology (1)
- molecular dynamics (1)
- molecular marker (1)
- narrative (1)
- pronephric development (1)
- prostate carcinoma cells (1)
- protease inhibitor (1)
- replicative fitness (1)
- resistance mutation (1)
- rumination (1)
- serine protease (NS3-4A) (1)
- structure constraints (1)
- urinary tract development (1)
- zebrafish (1)
- zebrafish development (1)
- β-catenin (1)
Institute
- Physik (121)
- Frankfurt Institute for Advanced Studies (FIAS) (115)
- Informatik (115)
- Medizin (10)
- ELEMENTS (3)
- Biowissenschaften (2)
- Pharmazie (1)
- Psychologie und Sportwissenschaften (1)
This work aims to differentiate strangeness produced from hard processes (jet-like) and softer processes (underlying event) by measuring the angular correlation between a high-momentum trigger hadron (h) acting as a jet-proxy and a produced strange hadron (φ(1020) meson). Measuring h–φ correlations at midrapidity in p–Pb collisions at √sNN = 5.02 TeV as a function of event multiplicity provides insight into the microscopic origin of strangeness enhancement in small collision systems. The jet-like and the underlying-event-like strangeness production are investigated as a function of event multiplicity. They are also compared between a lower and higher momentum region. The evolution of the per-trigger yields within the near-side (aligned with the trigger hadron) and away-side (in the opposite direction of the trigger hadron) jet is studied separately, allowing for the characterization of two distinct jet-like production regimes. Furthermore, the h–φ correlations within the underlying event give access to a production regime dominated by soft production processes, which can be compared directly to the in-jet production. Comparisons between h–φ and dihadron correlations show that the observed strangeness enhancement is largely driven by the underlying event, where the φ/h ratio is significantly larger than within the jet regions. As multiplicity increases, the fraction of the total φ(1020) yield coming from jets decreases compared to the underlying event production, leading to high-multiplicity events being dominated by the increased strangeness production from the underlying event
First measurements of hadron(h)−Λ azimuthal angular correlations in p−Pb collisions at sNN−−−√ = 5.02 TeV using the ALICE detector at the LHC are presented. These correlations are used to separate the production of associated Λ baryons into three different kinematic regions, namely those produced in the direction of the trigger particle (near-side), those produced in the opposite direction (away-side), and those whose production is uncorrelated with the jet-axis (underlying event). The per-trigger associated Λ yields in these regions are extracted, along with the near- and away-side azimuthal peak widths, and the results are studied as a function of associated particle pT and event multiplicity. Comparisons with the DPMJET event generator and previous measurements of the ϕ(1020) meson are also made. The final results indicate that strangeness production in the highest multiplicity p−Pb collisions is enhanced relative to low multiplicity collisions in the jet-like regions, as well as the underlying event. The production of Λ relative to charged hadrons is also enhanced in the underlying event when compared to the jet-like regions. Additionally, the results hint that strange quark production in the away-side of the jet is modified by soft interactions with the underlying event.
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±.
Measurements of the production of electrons from heavy-flavour hadron decays in pp collisions at s√=13 TeV at midrapidity with the ALICE detector are presented down to a transverse momentum (pT) of 0.2 GeV/c and up to pT=35 GeV/c, which is the largest momentum range probed for inclusive electron measurements in ALICE. In p−Pb collisions, the production cross section and the nuclear modification factor of electrons from heavy-flavour hadron decays are measured in the pT range 0.5<pT<26 GeV/c at sNN−−−√=8.16 TeV. The nuclear modification factor is found to be consistent with unity within the statistical and systematic uncertainties. In both collision systems, first measurements of the yields of electrons from heavy-flavour hadron decays in different multiplicity intervals normalised to the multiplicity-integrated yield (self-normalised yield) at midrapidity are reported as a function of the self-normalised charged-particle multiplicity estimated at midrapidity. The self-normalised yields in pp and p−Pb collisions grow faster than linear with the self-normalised multiplicity. A strong pT dependence is observed in pp collisions, where the yield of high-pT electrons increases faster as a function of multiplicity than the one of low-pT electrons. The measurement in p−Pb collisions shows no pT dependence within uncertainties. The self-normalised yields in pp and p−Pb collisions are compared with measurements of other heavy-flavour, light-flavour, and strange particles, and with Monte Carlo simulations.