Charged-particle multiplicity measurement in proton-proton collisions at root s=0.9 and 2.36 TeV with ALICE at LHC

0357540 - ÚJF 2011 RIV DE eng J - Journal Article
Aamodt, K. - Abel, N. - Abeysekara, U. - Abramyan, A. - Quintana, A.A. - Adamová, Dagmar - Bielčík, Jaroslav - Bielčíková, Jana - Kapitán, Jan - Kushpil, Svetlana - Kushpil, Vasilij - Pachr, M. - Petráček, Vojtěch - Rak, Jan - Šumbera, Michal - Tlustý, David - Wagner, Vladimír - Mareš, Jiří A. - Polák, Karel - Závada, Petr
Charged-particle multiplicity measurement in proton-proton collisions at root s=0.9 and 2.36 TeV with ALICE at LHC.
European Physical Journal C. Roč. 68, 1-2 (2010), s. 89-108. ISSN 1434-6044. E-ISSN 1434-6052
R&D Projects: GA MŠMT LA08015
Institutional research plan: CEZ:AV0Z10480505; CEZ:AV0Z10100502
Keywords : HADRON-HADRON COLLISIONS * DIFFRACTION DISSOCIATION * PP INTERACTIONS
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.248, year: 2010

Charged-particle production was studied in proton-proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range vertical bar eta vertical bar < 1.4. In the central region (vertical bar eta vertical bar < 0.5), at 0.9 TeV, we measure charged-particle pseudo-rapidity density dN(ch)/d eta = 3.02 +/- 0.01(stat.)(-0.05)(+0.08)(syst.) for inelastic interactions, and dN(ch)/d eta = 3.58 +/- 0.01 (stat.)(-0.12)(+0.12)(syst.) for non-single-diffractive interactions. At 2.36 TeV, we find dN(ch)/d eta = 3.77 +/- 0.01(stat.)(-0.12)(+0.25)(syst.) for inelastic, and dN(ch)/d eta = 4.43 +/- 0.01(stat.)(-0.12)(+0.17)(syst.) for non-single-diffractive collisions.
Permanent Link: http://hdl.handle.net/11104/0195795