Refine
Year of publication
Document Type
- Preprint (659)
- Article (393)
- Working Paper (1)
Has Fulltext
- yes (1053)
Is part of the Bibliography
- no (1053)
Keywords
- Heavy Ion Experiments (20)
- Hadron-Hadron Scattering (11)
- Hadron-Hadron scattering (experiments) (11)
- LHC (8)
- Heavy-ion collision (6)
- Collective Flow (4)
- Quark-Gluon Plasma (4)
- ALICE (3)
- ALICE experiment (3)
- Jets (3)
- Jets and Jet Substructure (3)
- COVID-19 surveillance (2)
- Charm physics (2)
- Experimental nuclear physics (2)
- Experimental particle physics (2)
- Heavy Ions (2)
- Heavy Quark Production (2)
- Lepton-Nucleon Scattering (experiments) (2)
- Omicron (2)
- Particle Correlations and Fluctuations (2)
- Particle and resonance production (2)
- Particle correlations and fluctuations (2)
- Pb–Pb collisions (2)
- QCD (2)
- SARS-CoV-2 monitoring (2)
- pp collisions (2)
- species richness (2)
- 2-aminobenzimidazole (1)
- 900 GeV (1)
- ALICE detector (1)
- Alternative splicing (1)
- Anti-nuclei (1)
- B.1.1.529 (1)
- BA.4 (1)
- BA.5 (1)
- BFIS (1)
- Beauty production (1)
- Blinatumomab (1)
- Boosted Jets (1)
- Breast cancer (1)
- Business strategy in drug development (1)
- CAR (1)
- CD19 (1)
- COVID-19 (1)
- Carex firma community (1)
- Carex sempervirens community (1)
- Centrality Class (1)
- Centrality Selection (1)
- Cherenkov counter: lead-glass (1)
- Classification (1)
- Collective Flow, (1)
- Comparison with QCD (1)
- Cryoelectron microscopy (1)
- Cryoelectron tomography (1)
- DNA/LNA mixmers (1)
- Detection workflow (1)
- Digital breast tomosynthesis (DBT) (1)
- Digital mammography (1)
- Drug therapy (1)
- ERBB2 (1)
- ERBB2 (HER2/neu) (1)
- Electron-pion identification (1)
- Electroweak interaction (1)
- Elliptic flow (1)
- Epidemiology (1)
- Exitrons (1)
- Femtoscopy (1)
- Fibre/foam sandwich radiator (1)
- Fracture type (1)
- Genetics (1)
- Glioblastoma (1)
- HADES (1)
- HBT (1)
- HER2/neu (1)
- Hadron production (1)
- Hadron-Hadron Scattering Heavy (1)
- Hadron-hadron interactions (1)
- Hard Scattering (1)
- Heavy Ion Experiment (1)
- Heavy flavor production (1)
- Heavy flavour production (1)
- Heavy ions (1)
- Heavy-flavour decay muons (1)
- Heavy-ion collisions (1)
- High Nature Value grassland (1)
- Immunogenetics (1)
- Immunology (1)
- Immunotherapy (1)
- Inclusive spectra (1)
- Intensity interferometry (1)
- Invariant Mass Distribution (1)
- Ionisation energy loss (1)
- Jet Physics (1)
- Jet Substructure (1)
- Long-read sequencing (1)
- MGMT (1)
- Material budget (1)
- Mid-rapidity (1)
- Minimum Bias (1)
- Monte Carlo (1)
- Multi-Parton Interactions (1)
- Multi-strange baryons (1)
- Multi-wire proportional drift chamber (1)
- NK-92 (1)
- NMR spectroscopy (1)
- Neural network (1)
- Nuclear modification factor (1)
- Obesity (1)
- Oxford Nanopore Technologies (1)
- PKD (1)
- PKD/IC (1)
- PRRT2 (1)
- PYTHIA (1)
- Particle and Resonance Production (1)
- Pb–Pb (1)
- Phalangeal fractures (1)
- Population-based screening (1)
- Production Cross Section (1)
- Properties of Hadrons (1)
- Proton–proton (1)
- Psychiatric disorders (1)
- Quark Deconfinement (1)
- Quark Gluon Plasma (1)
- Quark Production (1)
- Quark gluon plasma (1)
- Quarkonium (1)
- RMS (1)
- RNA induced silencing complex (1)
- RNA recognition (1)
- Rapidity Range (1)
- Recall rate (1)
- Relativistic heavy ion physics (1)
- Relativistic heavy-ion collisions (1)
- Resolution Parameter (1)
- Reverse transcription (1)
- SARS-CoV-2 (1)
- Single electrons (1)
- Single muons (1)
- Systematic Uncertainty (1)
- TR (1)
- Temozolomide (1)
- Time Projection Chamber (1)
- Tracking (1)
- Transition radiation detector (1)
- Transverse momentum (1)
- Treatment (1)
- Trigger (1)
- Variant of concern (1)
- Vector Boson Production (1)
- Wastewater-based epidemiology (WBE) (1)
- Western blot (1)
- X-ray crystallography (1)
- Xenon-based gas mixture (1)
- accessory proteins (1)
- alleles (1)
- alpine vegetation (1)
- argonaute protein (1)
- artificial intelligence (1)
- autism spectrum disorder (1)
- autistic disorder (1)
- axions (1)
- bryophyte (1)
- calorimeter: electromagnetic (1)
- cancer immunotherapy (1)
- cardiac arrest (1)
- case study (1)
- cell-free protein synthesis (1)
- cellular heterogeneity (1)
- cellular therapy (1)
- chimeric antigen receptor (1)
- cleavage of large RNA molecules (1)
- cleavage site selection (1)
- conservation (1)
- copy number polymorphism (1)
- cytokine-induced killer cells (1)
- dE/dx (1)
- dark matter experiments (1)
- detector (1)
- dry grassland (1)
- dye labeling (1)
- ectosomes (1)
- electronics: readout (1)
- ethical trade-off (1)
- exosomes (1)
- experimental results (1)
- explainable AI (1)
- extracellular vesicles (1)
- familial infantile epilepsy (1)
- fear conditioning (1)
- fibre: optical (1)
- genes (1)
- genetics (1)
- genome (1)
- genotype (1)
- genotype determination (1)
- global warming (1)
- guanidine analogs (1)
- guidelines (1)
- healthcare (1)
- heavy ion experiments (1)
- hemiplegic migraine (1)
- intrinsically disordered region (1)
- learning (1)
- lichen (1)
- locked nucleic acids (1)
- mRNA (1)
- mRNA isoforms (1)
- medial prefrontal cortex (mPFC) (1)
- memory consolidation and extinction (1)
- microparticles (1)
- microvesicles (1)
- minimal information requirements (1)
- nitrogen deposition (1)
- nomenclatural revision (1)
- nonstructural proteins (1)
- oligonucleotides (1)
- phenotype (1)
- phenotypic spectrum (1)
- prostate cancer (1)
- pull-down (1)
- quark gluon plasma (1)
- reproducibility (1)
- rhabdomyosarcoma (1)
- rigor (1)
- single nucleotide polymorphism (1)
- single-cell proteomics (1)
- solar physics (1)
- species composition (1)
- specificity of cleavage (1)
- spectra (1)
- stability (1)
- standardization (1)
- structural proteins (1)
- succession (1)
- transcranial magnetic stimulation (TMS) (1)
- trust (1)
- trustworthy AI (1)
- variant of concern (1)
- vascular plant (1)
- vegetation classification (1)
- vegetation-environment relationship (1)
- wastewater-based epidemiology (WBE) (1)
- white and brown dwarfs (1)
- √sN N = 2.76 TeV (1)
Institute
- Physik (1019)
- Frankfurt Institute for Advanced Studies (FIAS) (944)
- Informatik (909)
- Medizin (19)
- Biowissenschaften (3)
- Informatik und Mathematik (3)
- Biochemie und Chemie (2)
- Buchmann Institut für Molekulare Lebenswissenschaften (BMLS) (2)
- Hochschulrechenzentrum (2)
- Biochemie, Chemie und Pharmazie (1)
Direct photon production at mid-rapidity in Pb–Pb collisions at √sNN=2.76 TeV was studied in the transverse momentum range 0.9<pT<14 GeV/c. Photons were detected with the highly segmented electromagnetic calorimeter PHOS and via conversions in the ALICE detector material with the e+e− pair reconstructed in the central tracking system. The results of the two methods were combined and direct photon spectra were measured for the 0–20%, 20–40%, and 40–80% centrality classes. For all three classes, agreement was found with perturbative QCD calculations for pT≳5 GeV/c. Direct photon spectra down to pT≈1 GeV/c could be extracted for the 20–40% and 0–20% centrality classes. The significance of the direct photon signal for 0.9<pT<2.1 GeV/c is 2.6σ for the 0–20% class. The spectrum in this pT range and centrality class can be described by an exponential with an inverse slope parameter of (297±12stat±41syst) MeV. State-of-the-art models for photon production in heavy-ion collisions agree with the data within uncertainties.
The transverse momentum (pT) spectrum and nuclear modification factor (RAA) of reconstructed jets in 0–10% and 10–30% central Pb–Pb collisions at √sNN = 2.76 TeV were measured. Jets were reconstructed using the anti-kT jet algorithm with a resolution parameter of R = 0.2 from charged and neutral particles, utilizing the ALICE tracking detectors and Electromagnetic Calorimeter (EMCal). The jet pT spectra are reported in the pseudorapidity interval of |ηjet| < 0.5 for 40 < pT, jet < 120 GeV/c in 0–10% and for 30 < pT, jet < 100 GeV/c in 10–30% collisions. Reconstructed jets were required to contain a leading charged particle with pT > 5 GeV/c to suppress jets constructed from the combinatorial background in Pb–Pb collisions. The leading charged particle requirement applied to jet spectra both in pp and Pb–Pb collisions had a negligible effect on the RAA. The nuclear modification factor RAA was found to be 0.28 ± 0.04 in 0–10% and 0.35 ± 0.04 in 10–30% collisions, independent of pT, jet within the uncertainties of the measurement. The observed suppression is in fair agreement with expectations from two model calculations with different approaches to jet quenching.
We have performed the first measurement of the coherent ψ(2S) photo production cross section in ultraperipheral Pb–Pb 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 dσcoh ψ(2S)/dy = 0.83±0.19 stat+syst mb. The ψ(2S) to J/ψ coherent cross section ratio is 0.34+0.08 −0.07(stat + syst). The obtained results are compared to predictions from theoretical models.
A measurement of dijet correlations in p–Pb collisions at √sNN = 5.02 TeV with the ALICE detector is presented. Jets are reconstructed from charged particles measured in the central tracking detectors and neutral energy deposited in the electromagnetic calorimeter. The transverse momentum of the full jet (clustered from charged and neutral constituents) and charged jet (clustered from charged particles only) is corrected event-by-event for the contribution of the underlying event, while corrections for underlying event fluctuations and finite detector resolution are applied on an inclusive basis. A projection of the dijet transverse momentum, kTy = pch+ne T,jet sin(ϕdijet) with ϕdijet the azimuthal angle between a full and charged jet and pch+ne T,jet the transverse momentum of the full jet, is used to study nuclear matter effects in p–Pb collisions. This observable is sensitive to the acoplanarity of dijet production and its potential modification in p–Pb collisions with respect to pp collisions. Measurements of the dijet kTy as a function of the transverse momentum of the full and recoil charged jet, and the event multiplicity are presented. No significant modification of kTy due to nuclear matter effects in p–Pb collisions with respect to the event multiplicity or a PYTHIA8 reference is observed.
The measurement of the mass differences for systems bound by the strong force has reached a very high precision with protons and anti-protons1,2. The extension of such measurement from (anti-)baryons to (anti-)nuclei allows one to probe any difference in the interactions between nucleons and anti-nucleons encoded in the (anti-)nuclei masses. This force is a remnant of the underlying strong interaction among quarks and gluons and can be described by effective theories3, but cannot yet be directly derived from quantum chromodynamics. Here we report a measurement of the difference between the ratios of the mass and charge of deuterons (d) and anti-deuterons (), and 3He and nuclei carried out with the ALICE (A Large Ion Collider Experiment)4 detector in Pb–Pb collisions at a centre-of-mass energy per nucleon pair of 2.76 TeV. Our direct measurement of the mass-over-charge differences confirms CPT invariance to an unprecedented precision in the sector of light nuclei5,6. This fundamental symmetry of nature, which exchanges particles with anti-particles, implies that all physics laws are the same under the simultaneous reversal of charge(s) (charge conjugation C), reflection of spatial coordinates (parity transformation P) and time inversion (T).
The first measurement of two-pion Bose–Einstein correlations in central Pb–Pb collisions at √sNN=2.76 TeV at the Large Hadron Collider is presented. We observe a growing trend with energy now not only for the longitudinal and the outward but also for the sideward pion source radius. The pion homogeneity volume and the decoupling time are significantly larger than those measured at RHIC.
Inclusive transverse momentum spectra of primary charged particles in Pb–Pb collisions at √sNN=2.76 TeV have been measured by the ALICE Collaboration at the LHC. The data are presented for central and peripheral collisions, corresponding to 0–5% and 70–80% of the hadronic Pb–Pb cross section. The measured charged particle spectra in |η|<0.8 and 0.3<pT<20 GeV/c are compared to the expectation in pp collisions at the same sNN, scaled by the number of underlying nucleon–nucleon collisions. The comparison is expressed in terms of the nuclear modification factor RAA. The result indicates only weak medium effects (RAA≈0.7) in peripheral collisions. In central collisions, RAA reaches a minimum of about 0.14 at pT=6–7 GeV/c and increases significantly at larger pT. The measured suppression of high-pT particles is stronger than that observed at lower collision energies, indicating that a very dense medium is formed in central Pb–Pb collisions at the LHC.
Rapidity and transverse momentum dependence of inclusive J/ψ production in pp collisions at √s=7 TeV
(2011)
The ALICE experiment at the LHC has studied inclusive J/ψ production at central and forward rapidities in pp collisions at √s=7 TeV. In this Letter, we report on the first results obtained detecting the J/ψ through the dilepton decay into e+e− and μ+μ− pairs in the rapidity ranges |y|<0.9 and 2.5<y<4, respectively, and with acceptance down to zero pT. In the dielectron channel the analysis was carried out on a data sample corresponding to an integrated luminosity Lint=5.6 nb−1 and the number of signal events is NJ/ψ=352±32(stat.)±28(syst.); the corresponding figures in the dimuon channel are Lint=15.6 nb−1 and NJ/ψ=1924±77(stat.)±144(syst.). The measured production cross sections are σJ/ψ(|y|<0.9)=10.7±1.0(stat.)±1.6(syst.)−2.3+1.6(syst.pol.)μb and σJ/ψ(2.5<y<4)=6.31±0.25(stat.)±0.76(syst.)−1.96+0.95(syst.pol.)μb. The differential cross sections, in transverse momentum and rapidity, of the J/ψ were also measured.
We report the first measurement at the LHC of coherent photoproduction of ρ0 mesons in ultra-peripheral Pb-Pb collisions. The invariant mass and transverse momentum distributions for ρ0 production are studied in the π+π− decay channel at mid-rapidity. The production cross section in the rapidity range |y|<0.5 is found to be dσ/dy=425±10(stat.) +42−50(sys.) mb. Coherent ρ0 production is studied with and without requirement of nuclear breakup, and the fractional yields for various breakup scenarios are presented. The results are compared with those from lower energies and with model predictions.