Refine
Language
- English (583)
Has Fulltext
- yes (583)
Is part of the Bibliography
- no (583)
Keywords
- Heavy Ion Experiments (17)
- Hadron-Hadron scattering (experiments) (11)
- Heavy-ion collision (5)
- Experimental nuclear physics (2)
- Experimental particle physics (2)
- Lepton-Nucleon Scattering (experiments) (2)
- Particle and resonance production (2)
- Particle correlations and fluctuations (2)
- ALICE detector (1)
- Anti-nuclei (1)
- Electron-pion identification (1)
- Electroweak interaction (1)
- Fibre/foam sandwich radiator (1)
- Hadron-hadron interactions (1)
- Heavy Quark Production (1)
- Ionisation energy loss (1)
- LHC (1)
- Laser-produced plasmas (1)
- Multi-wire proportional drift chamber (1)
- Neural network (1)
- Pb–Pb collisions (1)
- Plasma-based accelerators (1)
- Quark Gluon Plasma (1)
- Relativistic heavy-ion collisions (1)
- TR (1)
- Tracking (1)
- Transition radiation detector (1)
- Trigger (1)
- Xenon-based gas mixture (1)
- dE/dx (1)
- heavy ion experiments (1)
- quark gluon plasma (1)
Institute
- Physik (583)
- Frankfurt Institute for Advanced Studies (FIAS) (528)
- Informatik (498)
- Informatik und Mathematik (3)
This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at sNN=2.76 TeV and sNN=5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the hot Quantum Chromodynamics (QCD) matter created in nuclear collisions at collider energies. Jets are reconstructed from charged particles using the anti-kT jet algorithm and resolution parameter R=0.4. The jets are measured in the pseudorapidity range |ηjet|<0.5 and in three intervals of transverse momentum between 60 GeV/c and 120 GeV/c. The measurement of the jet mass in central Pb–Pb collisions is compared to the jet mass as measured in p–Pb reference collisions, to vacuum event generators, and to models including jet quenching. It is observed that the jet mass in central Pb–Pb collisions is consistent within uncertainties with p–Pb reference measurements. Furthermore, the measured jet mass in Pb–Pb collisions is not reproduced by the quenching models considered in this letter and is found to be consistent with PYTHIA expectations within systematic uncertainties.
The second and the third order anisotropic flow, V2 and V3, are mostly determined by the corresponding initial spatial anisotropy coefficients, ε2 and ε3, in the initial density distribution. In addition to their dependence on the same order initial anisotropy coefficient, higher order anisotropic flow, Vn (n > 3), can also have a significant contribution from lower order initial anisotropy coefficients, which leads to mode-coupling effects. In this Letter we investigate the linear and non-linear modes in higher order anisotropic flow Vn for n = 4, 5, 6 with the ALICE detector at the Large Hadron Collider. The measurements are done for particles in the pseudorapidity range |η| < 0.8 and the transverse momentum range 0.2 < pT < 5.0 GeV/c as a function of collision centrality. The results are compared with theoretical calculations and provide important constraints on the initial conditions, including initial spatial geometry and its fluctuations, as well as the ratio of the shear viscosity to entropy density of the produced system.
We report on the successful implementation and characterization of a cryogenic solid hydrogen target in experiments on high-power laser-driven proton acceleration. When irradiating a solid hydrogen filament of 10 μm diameter with 10-Terawatt laser pulses of 2.5 J energy, protons with kinetic energies in excess of 20 MeV exhibiting non-thermal features in their spectrum were observed. The protons were emitted into a large solid angle reaching a total conversion efficiency of several percent. Two-dimensional particle-in-cell simulations confirm our results indicating that the spectral modulations are caused by collisionless shocks launched from the surface of the the high-density filament into a low-density corona surrounding the target. The use of solid hydrogen targets may significantly improve the prospects of laser-accelerated proton pulses for future applications.