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We report on the first measurement of the triangular v3, quadrangular v4, and pentagonal v5 charged particle flow in Pb-Pb collisions at sqrt(s(NN)) = 2.76  TeV measured with the ALICE detector at the CERN Large Hadron Collider. We show that the triangular flow can be described in terms of the initial spatial anisotropy and its fluctuations, which provides(More)
Measurements of cross sections of inelastic and diffractive processes in proton–proton collisions at LHC energies were carried out with the ALICE detector. The fractions of diffractive processes in inelastic collisions were determined from a study of gaps in charged particle pseudora-pidity distributions: for single diffraction (diffractive mass
The ALICE measurement of K(S)(0) and Λ production at midrapidity in Pb-Pb collisions at √(s(NN))=2.76 TeV is presented. The transverse momentum (p(T)) spectra are shown for several collision centrality intervals and in the p(T) range from 0.4 GeV/c (0.6 GeV/c for Λ) to 12 GeV/c. The p(T) dependence of the Λ/K(S)(0) ratios exhibits maxima in the vicinity of(More)
Differential cross sections of charged particles in inelastic pp collisions as a function of p T have been measured at √ s = 0.9, 2.76 and 7 TeV at the LHC. The p T spectra are compared to NLO-pQCD calculations. Though the differential cross section for an individual √ s cannot be described by NLO-pQCD, the relative increase of cross section with √ s is in(More)
The directed flow of charged particles at midrapidity is measured in Pb-Pb collisions at √(s(NN))=2.76 TeV relative to the collision symmetry plane defined by the spectator nucleons. A negative slope of the rapidity-odd directed flow component with approximately 3 times smaller magnitude than found at the highest RHIC energy is observed. This suggests a(More)
Finding particle trajectories is usually the most time consuming part of modern experiments in high energy physics. In many present experiments with high track densities and complicated event topologies a Kalman filter based track fit is used already at this combinatorial part of the event reconstruction. Therefore speed of the track fitting algorithm(More)
Lattice QCD today is one of the big computational challenges. Amongst other subjects lattice QCD allows to study the quark gluon plasma in areas where perturbative methods fail.[2] The current algorithm of choice is the rational hybrid Monte Carlo.[1] Up till now Lattice QCD calculations are often perfor-mend on specialized hardware like the apeNEXT or(More)
The ALICE Collaboration at the LHC has measured the J/ψ and ψ photoproduction at mid-rapidity in ultra-peripheral Pb–Pb collisions at √ s NN = 2.76 TeV. The charmonium is identified via its leptonic decay for events where the hadronic activity is required to be minimal. The analysis is based on an event sample corresponding to an integrated luminosity of(More)
The feasibility analysis of ontology incorporation into queries semantic analysis process, where queries to databases are formulated in natural polish language are contained in this paper. In presented work, the semantics of queries and the database was formalized with use of Description Logic. 1. Wprowadzenie W związku z tym, że niemal we wszystkich(More)