Abstract
The first results from p-Pb collisions at sqrt(sNN) = 5.02 TeV are discussed.
Highlights
Proton–lead (p–Pb) collisions are an integral part of the nuclear program at the Large Hadron Collider (LHC).Their study provides the reference for the Pb–Pb data to disentangle initial from final state effects, as well as the potential to address the partonic structure of matter at low parton fractional momenta [1].The experimental results reported in these proceedings are obtained in a short low-luminosity run performed in September 2012, and a longer high-luminosity run in January/February 2013
The setup of the beams, which is constrained by the two-in-one magnet design of the LHC imposing the same magnetic rigidity of the beams, consisted of protons at energy and of
The pT dependence of the extracted v2 and v3 coefficients from two-particle correlations is found to be similar to that measured in Pb–Pb collisions (Fig. 8)
Summary
Proton–lead (p–Pb) collisions are an integral part of the nuclear program at the Large Hadron Collider (LHC). To investigate the role of nuclear effects in p–Pb collisions it is desirable to study experimental observables as a function of centrality of the collision. In p–Pb collisions, the correlation between multiplicity and collision geometry is less strong than in A–A collisions, and more importantly dynamical biases introduced by the multiplicity estimation can strongly affect the observables under study. The experimental results are either reported for minimum-bias collisions (where Ncoll = 208 σpp/σpPb = 7.0 ± 0.6, with σpp = 70 ± 5mb [2] and σpPb = 2.09 ± 0.12b [5]), or as a p-Pb, s NN.
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