20 research outputs found
Soft Physics in ALICE
ALICE is the dedicated experiment for relativistic heavy-ion physics at LHC. Following some considerations on the main characteristics of heavy-ion physics expected at the LHC energies, a review of the performance of the ALICE detector in the soft physics domain is discussed. In particular, global event characterization, measurement of identified particle spectra, detection of hadronic short-lived resonances, anisotropic flow determination and HBT correlation studies are discusse
Numerical simulation of tests for the evaluation of the performance of the reinforced concrete slabs strengthening by FRCM
AbstractIn this work the attention is focused to the numerical simulation of the experimental bending tests carried out on a total of six reinforced concrete r.c. plates the latter aimed to provide a basic understanding of the its performance when strengthened by Fiber Reinforced Cementitius Matrix (FRCM) Composites. Three of those were used as control specimens. The numerical simulation was carried out by LUSAS software. A good correlation between the FE results and data obtained from the test, both in the loadâdeformation behavior and the failure load was highlighted. This permits to prove that applied strengthening system gives back an enhancement 2.5 times greater in respect of the unreinforced case. A greater energy dissipation ability and a residual load-bearing capacity makes the proposed system very useful in the retrofitting as well as in the case of strengthening of bridge structures. Based on the validation of the FE results in bending, the numerical analysis was also extended to characterize the behavior of this strengthening system in tensile
Hadronic resonance production in pp and PbâPb collisions at LHC with the ALICE experiment
Resonances, with their lifetimes comparable to that of the fireball, can be used to estimate the time span and hadronic interaction cross section in the phase between chemical and kinetic freeze-out. In pp collisions, measurements of resonances provide an important baseline for heavy-ion data and allow for the tuning of QCD-inspired particle production models. The ALICE collaboration measured K*(892) and (1020) production, both in pp collisions at TeV and in PbâPb collisions at TeV. The inelastic yield of ÎŁ(1385)± in pp collision at TeV was also measured. Transverse momentum spectra, ratios to stable particles and a comparison between central and peripheral production are shown
Performance of prototypes for the ALICE electromagnetic calorimeter
The performance of prototypes for the ALICE electromagnetic sampling
calorimeter has been studied in test beam measurements at FNAL and CERN. A
array of final design modules showed an energy resolution of about
11% / 1.7 % with a uniformity of the response
to electrons of 1% and a good linearity in the energy range from 10 to 100 GeV.
The electromagnetic shower position resolution was found to be described by 1.5
mm 5.3 mm /. For an electron identification
efficiency of 90% a hadron rejection factor of was obtained.Comment: 10 pages, 10 figure
Hadronic resonance production in pp and PbâPb collisions at LHC with the ALICE experiment
Resonances, with their lifetimes comparable to that of the fireball, can be used to estimate the time span and hadronic interaction cross section in the phase between chemical and kinetic freeze-out. In pp collisions, measurements of resonances provide an important baseline for heavy-ion data and allow for the tuning of QCD-inspired particle production models. The ALICE collaboration measured K*(892)â° and Ï(1020) production, both in pp collisions at âs=7 TeV and in PbâPb collisions at âsNN=2,76 TeV. The inelastic yield of ÎŁ(1385)± in pp collision at âs=7 TeV was also measured. Transverse momentum spectra, ratios to stable particles and a comparison between central and peripheral production are shown
Strange hadrons and resonances at LHC energies with the ALICE detector
The study of (multi)strange hadrons and resonance production allows in heavyion collisions to gather information on the early partonic phase of the fireball and its evolution. The ALICE collaboration has measured the production of K*(892)0, Ï(1020) resonances and KS0, Î, Îâ, Ωâ hadrons and their anti-particles at mid-rapidity in PbâPb collisions at âsNN = 2.76 TeV. This contribution presents results on strangeness enhancement, baryon to meson ratios (Î/KS0 and Ωâ/Ï) and on resonance to stable particle ratio (Ï/K and K*/K). The nuclear modification factor RAA of the Ï(1020) will be also discussed
Hadronic resonance production measured by the ALICE detector at LHC energies
Hadronic resonances are a valuable tool to study the properties of the medium formed in heavy-ion collisions. In particular, they can provide information on particleformation mechanisms and on the properties of the medium at freeze-out, and furthermore they contribute to the systematic study of energy loss and recombination. Measurements of resonances in pp and in p-Pb collisions provide a necessary baseline for heavy-ion data and help to disentangle initial-state effects from medium-induced effects. In this proceedings the latest ALICE results on hadronic resonance production in pp, p-Pb and Pb-Pb collisions at LHC energies will be presented. In particular, the production of the K*(892)^0 and o/(1020) resonances at mid-rapidity has been studied in different collision systems at LHC energies, reconstructing the resonances via their hadronic decay in a wide momentum range. The resonance transverse momentum spectra, mean transverse momenta, ratio to stable particles and nuclear modification factor will be discussed
METHOD FOR MANUFACTURING A UV-RADIATION DETECTOR DEVICE BASED ON SIC, AND UV-RADIATION DETECTOR DEVICE BASED ON SIC
Subthreshold production of pions in coincidence with light particles
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