Refine
Language
- English (292)
Has Fulltext
- yes (292)
Is part of the Bibliography
- no (292)
Keywords
- BESIII (9)
- e +-e − Experiments (9)
- Branching fraction (8)
- Particle and Resonance Production (6)
- Quarkonium (5)
- Lepton colliders (4)
- Quark-Gluon Plasma (4)
- Charm Physics (3)
- Charmed mesons (3)
- Electroweak interaction (3)
- Exotics (3)
- Experimental nuclear physics (3)
- Experimental particle physics (3)
- Hadron-Hadron Scattering (3)
- Jets and Jet Substructure (3)
- Spectroscopy (3)
- e+-e− Experiments (3)
- Charm physics (2)
- Electroweak Interaction (2)
- Hadronic decays (2)
- Initial state radiation (2)
- Leptonic, semileptonic & radiative decays (2)
- Particle decays (2)
- QCD (2)
- ALICE detector (1)
- Anti-nuclei (1)
- BESIII detector (1)
- Bhabha (1)
- Boosted Jets (1)
- Born cross section measurement (1)
- Branching fractions (1)
- CP violation (1)
- Charmonium (1)
- Charmonium (-like) (1)
- Covariance matrix (1)
- Cross section (1)
- Dark photon (1)
- Dark sector (1)
- Electromagnetic form factor (1)
- Electromagnetic form factors (1)
- FOS: Physical sciences (1)
- Flavor changing neutral currents (1)
- Flavor symmetries (1)
- Flavour Physics (1)
- Form factors (1)
- Hadron-Hadron Scattering Heavy (1)
- Hadron-hadron interactions (1)
- Hadronic cross section (1)
- Heavy Ion Experiment (1)
- High Energy Physics - Experiment (hep-ex) (1)
- Hyperons (1)
- Invisible decays (1)
- Jet Physics (1)
- Jet Substructure (1)
- Jets (1)
- LHC (1)
- Muon anomaly (1)
- Neutrinos (1)
- Particle and resonance production (1)
- Particle phenomena (1)
- Pb–Pb collisions (1)
- Pion form factor (1)
- Polarization (1)
- Properties of Hadrons (1)
- Proton (1)
- Quantum chromodynamics (1)
- Quark Production (1)
- Radiative decay (1)
- Rare decays (1)
- Relativistic heavy-ion collisions (1)
- Semi-leptonic decays (1)
- Techniques Electromagnetic calorimeters (1)
- Vector Boson Production (1)
- Y states (1)
- center-of-mass energy (1)
- charmonium-like states (1)
- dimuon (1)
- e+e − annihilation (1)
- e+e⁻ − Experiments (1)
- e+e− Experiments (1)
- electron-positron collision (1)
- hadron spectroscopy (1)
- hadronic events (1)
- helicity amplitude analysis (1)
- inclusive J/ψ decays (1)
- number of J/ψ events (1)
- tetraquark (1)
- trigger efficiency (1)
- Λ+c baryon (1)
- Σ hyperon (1)
Institute
- Physik (292)
- Frankfurt Institute for Advanced Studies (FIAS) (111)
- Informatik (108)
- Informatik und Mathematik (3)
In ultraperipheral collisions (UPCs) of relativistic nuclei without overlap of nuclear densities, the two nuclei are excited by the Lorentz-contracted Coulomb fields of their collision partners. In these UPCs, the typical nuclear excitation energy is below a few tens of MeV, and a small number of nucleons are emitted in electromagnetic dissociation (EMD) of primary nuclei, in contrast to complete nuclear fragmentation in hadronic interactions. The cross sections of emission of given numbers of neutrons in UPCs of 208Pb nuclei at sNN−−−√=5.02 TeV were measured with the neutron zero degree calorimeters (ZDCs) of the ALICE detector at the LHC, exploiting a similar technique to that used in previous studies performed at sNN−−−√=2.76 TeV. In addition, the cross sections for the exclusive emission of one, two, three, four, and five forward neutrons in the EMD, not accompanied by the emission of forward protons, and thus mostly corresponding to the production of 207,206,205,204,203Pb, respectively, were measured for the first time. The predictions from the available models describe the measured cross sections well. These cross sections can be used for evaluating the impact of secondary nuclei on the LHC components, in particular, on superconducting magnets, and also provide useful input for the design of the Future Circular Collider (FCC-hh).
First measurement of Λ+c production down to pT = 0 in pp and p-Pb collisions at √𝑠NN = 5.02 TeV
(2023)
The production of prompt +c baryons has been measured at midrapidity in the transverse momentum interval 0 < pT < 1 GeV/c for the first time, in pp and p–Pb collisions at a center-of-mass energy per nucleon-nucleon collision √sNN = 5.02 TeV. The measurement was performed in the decay channel +c → pK0S by applying new decay reconstruction techniques using a Kalman-Filter vertexing algorithm and adopting a machine-learning approach for the candidate selection. The pT -integrated +c production cross sections in both collision systems were determined and used along with the measured yields in Pb–Pb collisions to compute the pT -integrated nuclear modification factors RpPb and RAA of +c baryons, which are compared to model calculations that consider nuclear modification of the parton distribution functions. The +c /D0 baryon-to-meson yield ratio is reported for pp and p–Pb collisions. Comparisons with models that include modified hadronization processes are presented, and the implications of the results on the understanding of charm hadronization in hadronic collisions are discussed. A significant (3.7σ) modification of the mean transverse momentum of + c baryons is seen in p–Pb collisions with respect to pp collisions, while the pT -integrated +c /D0 yield ratio was found to be consistent between the two collision systems within the uncertainties.