- Author
-
The ATLAS Collaboration
- Date
- 10-12-2016
- Title
- Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in √sNN =5.02 TeV p + Pb collisions measured by the ATLAS experiment
- Journal
- Physics Letters B
- Volume
- 763
- Pages (from-to)
- 313-336
- Document type
- Article
- Faculty
- Faculty of Science (FNWI)
- Institute
- Institute for High Energy Physics (IHEF)
- Abstract
-
Measurements of the per-event charged-particle yield as a function of the charged-particle transverse momentum and rapidity are performed using p + Pb collision data collected by the ATLAS experiment at the LHC at a centre-of-mass energy of √sNN = 5.02 TeV. Charged particles are reconstructed over pseudorapidity |η\< 2.3 and transverse momentum between 0.1 GeV and 22 GeV in a dataset corresponding to an integrated luminosity of 1μb-1. The results are presented in the form of charged-particle nuclear modification factors, where the p + Pb charged-particle multiplicities are compared between central and peripheral p + Pb collisions as well as to charged-particle cross sections measured in pp collisions. The p + Pb collision centrality is characterized by the total transverse energy measured in -4.9 < η < -3.1, which is in the direction of the outgoing lead beam. Three different estimations of the number of nucleons participating in the p + Pb collision are carried out using the Glauber model and two Glauber–Gribov colour-fluctuation extensions to the Glauber model. The values of the nuclear modification factors are found to vary significantly as a function of rapidity and transverse momentum. A broad peak is observed for all centralities and rapidities in the nuclear modification factors for charged-particle transverse momentum values around 3 GeV. The magnitude of the peak increases for more central collisions as well as rapidity ranges closer to the direction of the outgoing lead nucleus.
- URL
- go to publisher's site
- Language
- English
- Persistent Identifier
- https://hdl.handle.net/11245.1/2f9be2e9-15fb-4182-a3ff-827559381d41
- Downloads
-
Transverse momentum, rapidity, and centrality dependence(Final published version)
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