Charged-particle multiplicity density at mid-rapidity in central Pb-Pb collisions at sqrt(sNN) = 2.76 TeV

K. Aamodt; M. Chojnacki; P. Christakoglou; R. S. de Rooij; A. Grelli; R. Kamermans; A. Mischke; G.J.L. Nooren; T. Peitzmann; D. Thomas; M. van Leeuwen; M Veldhoen; M. Verweij

doi:10.1103/PhysRevLett.105.252301

Charged-particle multiplicity density at mid-rapidity in central Pb-Pb collisions at sqrt(sNN) = 2.76 TeV

K. Aamodt, M. Chojnacki, P. Christakoglou, R. S. de Rooij, A. Grelli, R. Kamermans, A. Mischke, G.J.L. Nooren, T. Peitzmann, D. Thomas, M. van Leeuwen, M Veldhoen, M. Verweij

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Abstract

The first measurement of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at a centre-of-mass energy per nucleon pair sqrt(sNN) = 2.76 TeV is presented. For an event sample corresponding to the most central 5% of the hadronic cross section the pseudo-rapidity density of primary charged particles at mid-rapidity is 1584 +- 4 (stat) +- 76 (sys.), which corresponds to 8.3 +- 0.4 (sys.) per participating nucleon pair. This represents an increase of about a factor 1.9 relative to pp collisions at similar collision energies, and about a factor 2.2 to central Au-Au collisions at sqrt(sNN) = 0.2 TeV. This measurement provides the first experimental constraint for models of nucleus-nucleus collisions at LHC energies

Original language	English
Pages (from-to)	252301
Number of pages	11
Journal	Physical Review Letters
Volume	105
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.105.252301
Publication status	Published - 2010

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ALICE Collaboration

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Aamodt, K., Chojnacki, M., Christakoglou, P., de Rooij, R. S., Grelli, A., Kamermans, R., Mischke, A., Nooren, G. J. L., Peitzmann, T., Thomas, D., van Leeuwen, M., Veldhoen, M., & Verweij, M. (2010). Charged-particle multiplicity density at mid-rapidity in central Pb-Pb collisions at sqrt(sNN) = 2.76 TeV. Physical Review Letters, 105(25), 252301. https://doi.org/10.1103/PhysRevLett.105.252301

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title = "Charged-particle multiplicity density at mid-rapidity in central Pb-Pb collisions at sqrt(sNN) = 2.76 TeV",

abstract = "The first measurement of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at a centre-of-mass energy per nucleon pair sqrt(sNN) = 2.76 TeV is presented. For an event sample corresponding to the most central 5% of the hadronic cross section the pseudo-rapidity density of primary charged particles at mid-rapidity is 1584 +- 4 (stat) +- 76 (sys.), which corresponds to 8.3 +- 0.4 (sys.) per participating nucleon pair. This represents an increase of about a factor 1.9 relative to pp collisions at similar collision energies, and about a factor 2.2 to central Au-Au collisions at sqrt(sNN) = 0.2 TeV. This measurement provides the first experimental constraint for models of nucleus-nucleus collisions at LHC energies",

author = "K. Aamodt and M. Chojnacki and P. Christakoglou and {de Rooij}, {R. S.} and A. Grelli and R. Kamermans and A. Mischke and G.J.L. Nooren and T. Peitzmann and D. Thomas and {van Leeuwen}, M. and M Veldhoen and M. Verweij",

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Aamodt, K, Chojnacki, M, Christakoglou, P, de Rooij, RS, Grelli, A, Kamermans, R, Mischke, A, Nooren, GJL, Peitzmann, T, Thomas, D, van Leeuwen, M, Veldhoen, M & Verweij, M 2010, 'Charged-particle multiplicity density at mid-rapidity in central Pb-Pb collisions at sqrt(sNN) = 2.76 TeV', Physical Review Letters, vol. 105, no. 25, pp. 252301. https://doi.org/10.1103/PhysRevLett.105.252301

TY - JOUR

T1 - Charged-particle multiplicity density at mid-rapidity in central Pb-Pb collisions at sqrt(sNN) = 2.76 TeV

AU - Aamodt, K.

AU - Chojnacki, M.

AU - Christakoglou, P.

AU - de Rooij, R. S.

AU - Grelli, A.

AU - Kamermans, R.

AU - Mischke, A.

AU - Nooren, G.J.L.

AU - Peitzmann, T.

AU - Thomas, D.

AU - van Leeuwen, M.

AU - Veldhoen, M

AU - Verweij, M.

N1 - ALICE Collaboration

PY - 2010

Y1 - 2010

N2 - The first measurement of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at a centre-of-mass energy per nucleon pair sqrt(sNN) = 2.76 TeV is presented. For an event sample corresponding to the most central 5% of the hadronic cross section the pseudo-rapidity density of primary charged particles at mid-rapidity is 1584 +- 4 (stat) +- 76 (sys.), which corresponds to 8.3 +- 0.4 (sys.) per participating nucleon pair. This represents an increase of about a factor 1.9 relative to pp collisions at similar collision energies, and about a factor 2.2 to central Au-Au collisions at sqrt(sNN) = 0.2 TeV. This measurement provides the first experimental constraint for models of nucleus-nucleus collisions at LHC energies

AB - The first measurement of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at a centre-of-mass energy per nucleon pair sqrt(sNN) = 2.76 TeV is presented. For an event sample corresponding to the most central 5% of the hadronic cross section the pseudo-rapidity density of primary charged particles at mid-rapidity is 1584 +- 4 (stat) +- 76 (sys.), which corresponds to 8.3 +- 0.4 (sys.) per participating nucleon pair. This represents an increase of about a factor 1.9 relative to pp collisions at similar collision energies, and about a factor 2.2 to central Au-Au collisions at sqrt(sNN) = 0.2 TeV. This measurement provides the first experimental constraint for models of nucleus-nucleus collisions at LHC energies

U2 - 10.1103/PhysRevLett.105.252301

DO - 10.1103/PhysRevLett.105.252301

M3 - Article

SN - 0031-9007

VL - 105

SP - 252301

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

ER -

Charged-particle multiplicity density at mid-rapidity in central Pb-Pb collisions at sqrt(sNN) = 2.76 TeV

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