Measurement of the centrality dependence of J/¿ yields and observation of Z production in lead–lead collisions with the ATLAS detector at the LHC

G. Aad..[et al.]; Mogens Dam; John Renner Hansen; Jørgen Beck Hansen; Jørn Dines Hansen; Peter Henrik Hansen; Morten Dam Jørgensen; Esben Bryndt Klinkby; Thomas Høvring Kittelmann; Troels Christian Petersen; Stefania Xella; Nele Maria Philomena Boelaert

Measurement of the centrality dependence of J/¿ yields and observation of Z production in lead–lead collisions with the ATLAS detector at the LHC

G. Aad..[et al.], Mogens Dam, John Renner Hansen, Jørgen Beck Hansen, Jørn Dines Hansen, Peter Henrik Hansen, Morten Dam Jørgensen, Esben Bryndt Klinkby, Thomas Høvring Kittelmann, Troels Christian Petersen, Stefania Xella, Nele Maria Philomena Boelaert

149 Citationer (Scopus)

Abstract

Using the ATLAS detector, a centrality-dependent suppression has been observed in the yield of J/Ψ mesons produced in the collisions of lead ions at the Large Hadron Collider. In a sample of minimum-bias lead-lead collisions at a nucleon-nucleon centre of mass energy sNN=2.76 TeV, corresponding to an integrated luminosity of about 6.7 μb^-1, J/Ψ mesons are reconstructed via their decays to μ⁺μ^- pairs. The measured J/Ψ yield, normalized to the number of binary nucleon-nucleon collisions, is found to significantly decrease from peripheral to central collisions. The centrality dependence is found to be qualitatively similar to the trends observed at previous, lower energy experiments. The same sample is used to reconstruct Z bosons in the μ⁺μ^- final state, and a total of 38 candidates are selected in the mass window of 66 to 116 GeV. The relative Z yields as a function of centrality are also presented, although no conclusion can be inferred about their scaling with the number of binary collisions, because of limited statistics. This analysis provides the first results on J/Ψ and Z production in lead-lead collisions at the LHC.

Originalsprog	Engelsk
Tidsskrift	Physics Letters B
Vol/bind	697
Udgave nummer	4
Sider (fra-til)	294-312
Antal sider	18
ISSN	0370-2693
Status	Udgivet - 14 mar. 2011

Citationsformater

Aad..[et al.], G., Dam, M., Hansen, J. R., Hansen, J. B., Hansen, J. D., Hansen, P. H., Jørgensen, M. D., Klinkby, E. B., Kittelmann, T. H., Petersen, T. C., Xella, S., & Boelaert, N. M. P. (2011). Measurement of the centrality dependence of J/¿ yields and observation of Z production in lead–lead collisions with the ATLAS detector at the LHC. Physics Letters B, 697(4), 294-312.

@article{f7b402822b3347a1aece86d137d2e46a,

title = "Measurement of the centrality dependence of J/¿ yields and observation of Z production in lead–lead collisions with the ATLAS detector at the LHC",

abstract = "Using the ATLAS detector, a centrality-dependent suppression has been observed in the yield of J/Ψ mesons produced in the collisions of lead ions at the Large Hadron Collider. In a sample of minimum-bias lead-lead collisions at a nucleon-nucleon centre of mass energy sNN=2.76 TeV, corresponding to an integrated luminosity of about 6.7 μb-1, J/Ψ mesons are reconstructed via their decays to μ+μ- pairs. The measured J/Ψ yield, normalized to the number of binary nucleon-nucleon collisions, is found to significantly decrease from peripheral to central collisions. The centrality dependence is found to be qualitatively similar to the trends observed at previous, lower energy experiments. The same sample is used to reconstruct Z bosons in the μ+μ- final state, and a total of 38 candidates are selected in the mass window of 66 to 116 GeV. The relative Z yields as a function of centrality are also presented, although no conclusion can be inferred about their scaling with the number of binary collisions, because of limited statistics. This analysis provides the first results on J/Ψ and Z production in lead-lead collisions at the LHC.",

author = "{Aad..[et al.]}, G. and Mogens Dam and Hansen, {John Renner} and Hansen, {J{\o}rgen Beck} and Hansen, {J{\o}rn Dines} and Hansen, {Peter Henrik} and J{\o}rgensen, {Morten Dam} and Klinkby, {Esben Bryndt} and Kittelmann, {Thomas H{\o}vring} and Petersen, {Troels Christian} and Stefania Xella and Boelaert, {Nele Maria Philomena}",

year = "2011",

month = mar,

day = "14",

language = "English",

volume = "697",

pages = "294--312",

journal = "Physics Letters B",

issn = "0370-2693",

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number = "4",

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TY - JOUR

T1 - Measurement of the centrality dependence of J/¿ yields and observation of Z production in lead–lead collisions with the ATLAS detector at the LHC

AU - Aad..[et al.], G.

AU - Dam, Mogens

AU - Hansen, John Renner

AU - Hansen, Jørgen Beck

AU - Hansen, Jørn Dines

AU - Hansen, Peter Henrik

AU - Jørgensen, Morten Dam

AU - Klinkby, Esben Bryndt

AU - Kittelmann, Thomas Høvring

AU - Petersen, Troels Christian

AU - Xella, Stefania

AU - Boelaert, Nele Maria Philomena

PY - 2011/3/14

Y1 - 2011/3/14

N2 - Using the ATLAS detector, a centrality-dependent suppression has been observed in the yield of J/Ψ mesons produced in the collisions of lead ions at the Large Hadron Collider. In a sample of minimum-bias lead-lead collisions at a nucleon-nucleon centre of mass energy sNN=2.76 TeV, corresponding to an integrated luminosity of about 6.7 μb-1, J/Ψ mesons are reconstructed via their decays to μ+μ- pairs. The measured J/Ψ yield, normalized to the number of binary nucleon-nucleon collisions, is found to significantly decrease from peripheral to central collisions. The centrality dependence is found to be qualitatively similar to the trends observed at previous, lower energy experiments. The same sample is used to reconstruct Z bosons in the μ+μ- final state, and a total of 38 candidates are selected in the mass window of 66 to 116 GeV. The relative Z yields as a function of centrality are also presented, although no conclusion can be inferred about their scaling with the number of binary collisions, because of limited statistics. This analysis provides the first results on J/Ψ and Z production in lead-lead collisions at the LHC.

AB - Using the ATLAS detector, a centrality-dependent suppression has been observed in the yield of J/Ψ mesons produced in the collisions of lead ions at the Large Hadron Collider. In a sample of minimum-bias lead-lead collisions at a nucleon-nucleon centre of mass energy sNN=2.76 TeV, corresponding to an integrated luminosity of about 6.7 μb-1, J/Ψ mesons are reconstructed via their decays to μ+μ- pairs. The measured J/Ψ yield, normalized to the number of binary nucleon-nucleon collisions, is found to significantly decrease from peripheral to central collisions. The centrality dependence is found to be qualitatively similar to the trends observed at previous, lower energy experiments. The same sample is used to reconstruct Z bosons in the μ+μ- final state, and a total of 38 candidates are selected in the mass window of 66 to 116 GeV. The relative Z yields as a function of centrality are also presented, although no conclusion can be inferred about their scaling with the number of binary collisions, because of limited statistics. This analysis provides the first results on J/Ψ and Z production in lead-lead collisions at the LHC.

M3 - Journal article

SN - 0370-2693

VL - 697

SP - 294

EP - 312

JO - Physics Letters B

JF - Physics Letters B

IS - 4

ER -

Measurement of the centrality dependence of J/¿ yields and observation of Z production in lead–lead collisions with the ATLAS detector at the LHC

Abstract

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