Naslov
Dependence on pseudorapidity and on centrality of charged hadron production in PbPb collisions at sNN=276 TeV

Autori
Chatrchyan, S. ; ... ; Godinović, Nikola ; Kovač, Marko ; Lelas, Karlo ; Pleština, Roko ; Polić, Dunja ; Puljak, Ivica ; Antunović, Željko ; Dželalija, Mile ; Brigljević, Vuko ; Đurić, Senka ; Kadija, Krešo ; Morović, Srećko ; ... ; White, A.

Izvornik
The Journal of high energy physics (1126-6708) (2011), 8; 141-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
CERN; CMS; LHC

Sažetak
A measurement is presented of the charged hadron multiplicity in hadronic PbPb collisions, as a function of pseudorapidity and centrality, at a collision energy of 2.76 TeV per nucleon pair. The data sample is collected using the CMS detector and a minimum- bias trigger, with the CMS solenoid off. The number of charged hadrons is measured both by counting the number of reconstructed particle hits and by forming hit doublets of pairs of layers in the pixel detector. The two methods give consistent results. The charged hadron multiplicity density, dN ch /dη| η=0, for head-on collisions is found to be 1612 ± 55, where the uncertainty is dominated by systematic effects. Comparisons of these results to previous measurements and to various models are also presented.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
The CMS collaboration

POVEZANOST RADA