Charged-particle multiplicities in proton-proton collisions at root s=0.9 to 8 TeV
EUROPEAN PHYSICAL JOURNAL C, vol.77, no.1, 2017 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 77 Issue: 1
- Publication Date: 2017
- Doi Number: 10.1140/epjc/s10052-016-4571-1
- Journal Name: EUROPEAN PHYSICAL JOURNAL C
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Bursa Uludag University Affiliated: No
Abstract
A detailed study of pseudorapidity densities and multiplicity distributions of primary charged particles produced in proton-proton collisions, atv root s = 0.9, 2.36, 2.76, 7 and 8 TeV, in the pseudorapidity range vertical bar n vertical bar< 2, was carried out using the ALICE detector. Measurements were obtained for three event classes: inelastic, non-single diffractive and events with at least one charged particle in the pseudorapidity interval vertical bar n vertical bar<1. The use of an improved track-counting algorithm combined with ALICE's measurements of diffractive processes allows a higher precision compared to our previous publications. A KNO scaling study was performed in the pseudorapidity intervals vertical bar n vertical bar< 0.5, 1.0 and 1.5. The data are compared to other experimental results and to models as implemented in Monte Carlo event generators PHOJET and recent tunes of PYTHIA6, PYTHIA8 and EPOS.