PoS - Proceedings of Science
Volume 340 - The 39th International Conference on High Energy Physics (ICHEP2018) - Parallel: Heavy Ions
Transverse momentum distributions of charged particles in pp and nuclear collisions with ALICE at the LHC
E. Perez lezama* on behalf of the ALICE collaboration
*corresponding author
Full text: pdf
Published on: August 02, 2019
Abstract
The charged-particle transverse momentum spectrum in pp collisions is an important observable for testing perturbative QCD calculations and serves as a reference for heavy-ion collisions to study the properties of deconfined matter created in nucleus-nucleus (AA) collisions. The study of inclusive charged particle spectra gives information on parton energy loss in the medium created in AA collisions, leading to a suppression of hadron production at high transverse momentum ($p_{\rm T}$). This effect can be investigated by calculating the nuclear modification factor, defined as the ratio between the $p_{\rm T}$ spectrum measured in nucleus-nucleus collisions and a reference spectrum in pp collisions scaled by the number of binary collisions. ALICE has measured pp collisions over a large energy range $\sqrt{\textrm{s}} = $13, 7, 5.02 and 2.76 TeV, p-Pb at $\sqrt{\textrm{s}_{\rm NN}} = $5.02 TeV, Xe-Xe at $\sqrt{\textrm{s}_{\rm NN}} = $5.44 TeV and Pb-Pb $\sqrt{\textrm{s}_{\rm NN}} = $5.02 TeV and 2.76 TeV. We show the $p_{\rm T}$ spectra in pp and nuclear collisions as well as the nuclear modification factors with an exceptional precision as compared to previous results.
DOI: https://doi.org/10.22323/1.340.0674
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.