Abstract
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 2.76TeV 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, dNch/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.
| Original language | English |
|---|---|
| Article number | 141 |
| Journal | Journal of High Energy Physics |
| Volume | 2011 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2011 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
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Dependence on pseudorapidity and on centrality of charged hadron production in PbPb collisions at √sNN = 2.76 TeV. / The CMS Collaboration.
In: Journal of High Energy Physics, Vol. 2011, No. 8, 141, 01.01.2011.Research output: Contribution to journal › Article
TY - JOUR
T1 - Dependence on pseudorapidity and on centrality of charged hadron production in PbPb collisions at √sNN = 2.76 TeV
AU - The CMS Collaboration
AU - Chatrchyan, S.
AU - Khachatryan, V.
AU - Sirunyan, A. M.
AU - Tumasyan, A.
AU - Adam, W.
AU - Bergauer, T.
AU - Dragicevic, M.
AU - Erö, J.
AU - Fabjan, C.
AU - Friedl, M.
AU - Frühwirth, R.
AU - Ghete, V. M.
AU - Hammer, J.
AU - Hänsel, S.
AU - Hoch, M.
AU - Hörmann, N.
AU - Hrubec, J.
AU - Jeitler, M.
AU - Kiesenhofer, W.
AU - Krammer, M.
AU - Liko, D.
AU - Mikulec, I.
AU - Pernicka, M.
AU - Rahbaran, B.
AU - Rohringer, H.
AU - Schöfbeck, R.
AU - Strauss, J.
AU - Taurok, A.
AU - Teischinger, F.
AU - Trauner, C.
AU - Wagner, P.
AU - Waltenberger, W.
AU - Walzel, G.
AU - Widl, E.
AU - Wulz, C. E.
AU - Mossolov, V.
AU - Shumeiko, N.
AU - Suarez Gonzalez, J.
AU - Bansal, S.
AU - Benucci, L.
AU - De Wolf, E. A.
AU - Janssen, X.
AU - Luyckx, S.
AU - Maes, T.
AU - Mucibello, L.
AU - Ochesanu, S.
AU - Roland, B.
AU - Rougny, R.
AU - Selvaggi, M.
AU - Van Haevermaet, H.
PY - 2011/1/1
Y1 - 2011/1/1
N2 - 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 2.76TeV 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, dNch/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.
AB - 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 2.76TeV 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, dNch/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.
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U2 - 10.1007/JHEP08(2011)141
DO - 10.1007/JHEP08(2011)141
M3 - Article
AN - SCOPUS:80053129601
VL - 2011
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1126-6708
IS - 8
M1 - 141
ER -