%0 Journal Article
%T Measurement of the centrality dependence of the charged-particle pseudorapidity distribution in proton-lead collisions at root s(NN)=5.02 TeV with the ATLAS detector
%A ATLAS Collaboration (Aad, G. et al
%A Cabrera Urban, S.
%A Castillo Gimenez, V.
%A Costa, M. J.
%A Ferrer, A.
%A Fiorini, L.
%A Fuster, J.
%A Garcia, C.
%A Garcia Navarro, J. E.
%A Gonzalez de la Hoz, S.
%A Hernandez Jimenez, Y.
%A Higon-Rodriguez, E.
%A Irles Quiles, A.
%A Kaci, M.
%A King, M.
%A Lacasta, C.
%A Lacuesta, V. R.
%A March, L.
%A Marti-Garcia, S.
%A Miñano, M.
%A Mitsou, V. A.
%A Moles-Valls, R.
%A Oliver Garcia, E.
%A Pedraza Lopez, S.
%A Perez Garcia-Estañ, M. T.
%A Romero Adam, E.
%A Ros, E.
%A Salt, J.
%A Sanchez Martinez, V.
%A Soldevila, U.
%A Sanchez, J.
%A Torro Pastor, E.
%A Valero, A.
%A Valladolid Gallego, E.
%A Valls Ferrer, J. A.
%A Villaplana Perez, M.
%A Vos, M.
%J European Physical Journal C
%D 2016
%V 76
%N 4
%I Springer
%@ 1434-6044
%G English
%F ATLASCollaborationAad_etal2016
%O WOS:000375306400002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2652), last updated on Thu, 28 Jul 2016 12:07:21 +0000
%X The centrality dependence of the mean charged-particle multiplicity as a function of pseudorapidity is measured in approximately 1 μb(-1) of proton-lead collisions at a nucleon-nucleon centre-of-mass energy of root s(NN) = 5.02 TeV using the ATLAS detector at the Large Hadron Collider. Charged particles with absolute pseudorapidity less than 2.7 are reconstructed using the ATLAS pixel detector. The p + Pb collision centrality is characterised by the total transverse energy measured in the Pb-going direction of the forward calorimeter. The charged-particle pseudorapidity distributions are found to vary strongly with centrality, with an increasing asymmetry between the proton-going and Pb-going directions as the collisions become more central. Three different estimations of the number of nucleons participating in the p + Pb collision have been carried out using the Glauber model as well as two Glauber-Gribov inspired extensions to the Glauber model. Charged-particle multiplicities per participant pair are found to vary differently for these three models, highlighting the importance of including colour fluctuations in nucleon-nucleon collisions in the modelling of the initial state of p + Pb collisions.
%R 10.1140/epjc/s10052-016-4002-3
%U http://arxiv.org/abs/1508.00848
%U https://doi.org/10.1140/epjc/s10052-016-4002-3
%P 199-30pp