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arXiv · 1509.01304

Measurements of charged particle spectra and nuclear modification factor in p+Pb collisions with the ATLAS detector

Petr Balek
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Abstract

The ATLAS detector at the LHC obtained the sample of p+Pb data at $\sqrt{s_{NN}}={}$5.02TeV with integrated luminosity of 25nb${}^{-1}$, which can be compared to the pp data obtained by interpolating pp measurements at $\sqrt{s}={}$2.76TeV and 7TeV. Due to the excellent capabilities of the ATLAS detector, and its stable operation in heavy ion as well as proton-proton physics runs, the data allow measurements of the nuclear modification factor, ratio of heavy ion charged particle spectra divided by pp reference, in different centrality classes over a wide range of rapidity. The charged particle nuclear modification factor is found to vary significantly as a function of transverse momentum with a stronger dependence in more peripheral collisions.

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Petr Balek. 2015-09-03. Measurements of charged particle spectra and nuclear modification factor in p+Pb collisions with the ATLAS detector. https://doi.org/10.1016/j.nuclphysa.2014.09.042

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