Inclusive, prompt and non-prompt J/psi production at mid-rapidity in Pb-Pb collisions at root S-NN=2.76 TeV

J. Adam; D. Adamová; MM. Aggarwal; G.A. Rinella; A. Agnello; N. Agrawal; Z. Ahammed; S.U. Ahn; I. Amiot; S. Aiola; Hans Bøggild; Ian Bearden; Ante Bilandzic; Christian Holm Christensen; Jens Jørgen Gaardhøje; Kristjan Herlache Gulbrandsen; Alexander Colliander Hansen; Børge Svane Nielsen; Valentina Zaccolo; Marek Chojnacki

doi:10.1007/JHEP07(2015)051

Inclusive, prompt and non-prompt J/psi production at mid-rapidity in Pb-Pb collisions at root S-NN=2.76 TeV

J. Adam, D. Adamová, MM. Aggarwal, G.A. Rinella, A. Agnello, N. Agrawal, Z. Ahammed, S.U. Ahn, I. Amiot, S. Aiola, Hans Bøggild, Ian Bearden, Ante Bilandzic, Christian Holm Christensen, Jens Jørgen Gaardhøje, Kristjan Herlache Gulbrandsen, Alexander Colliander Hansen, Børge Svane Nielsen, Valentina Zaccolo, Marek Chojnacki

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Abstract

Abstract: The transverse momentum (p_T) dependence of the nuclear modification factor R_AA and the centrality dependence of the average transverse momentum 〈p_T〉 for inclusive J/ψ have been measured with ALICE for Pb-Pb collisions at √s_NN TeV in the e+e⁻ decay channel at mid-rapidity (|y| < 0.8). The 〈p_T〉 is significantly smaller than the one observed for pp collisions at the same centre-of-mass energy. Consistently, an increase of R_AA is observed towards low p_T. These observations might be indicative of a sizable contribution of charm quark coalescence to the J/ψ production. Additionally, the fraction of non-prompt J/ψ from beauty hadron decays, f_B, has been determined in the region 1.5 < p_T< 10 GeV/c in three centrality intervals. No significant centrality dependence of f_B is observed. Finally, the R_AA of non-prompt J/ψ is discussed and compared with model predictions. The nuclear modification in the region 4.5 < p_T< 10 GeV/c is found to be stronger than predicted by most models.

Originalsprog	Engelsk
Artikelnummer	051
Tidsskrift	Journal of High Energy Physics (Online)
Vol/bind	2015
Udgave nummer	7
ISSN	1126-6708
DOI	https://doi.org/10.1007/JHEP07(2015)051
Status	Udgivet - 25 jul. 2015

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10.1007/JHEP07(2015)051

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Adam, J., Adamová, D., Aggarwal, MM., Rinella, G. A., Agnello, A., Agrawal, N., Ahammed, Z., Ahn, S. U., Amiot, I., Aiola, S., Bøggild, H., Bearden, I., Bilandzic, A., Christensen, C. H., Gaardhøje, J. J., Gulbrandsen, K. H., Hansen, A. C., Nielsen, B. S., Zaccolo, V., & Chojnacki, M. (2015). Inclusive, prompt and non-prompt J/psi production at mid-rapidity in Pb-Pb collisions at root S-NN=2.76 TeV. Journal of High Energy Physics (Online), 2015(7), [051]. https://doi.org/10.1007/JHEP07(2015)051

Adam, J, Adamová, D, Aggarwal, MM, Rinella, GA, Agnello, A, Agrawal, N, Ahammed, Z, Ahn, SU, Amiot, I, Aiola, S, Bøggild, H , Bearden, I, Bilandzic, A, Christensen, CH , Gaardhøje, JJ , Gulbrandsen, KH, Hansen, AC, Nielsen, BS, Zaccolo, V & Chojnacki, M 2015, 'Inclusive, prompt and non-prompt J/psi production at mid-rapidity in Pb-Pb collisions at root S-NN=2.76 TeV', Journal of High Energy Physics (Online), bind 2015, nr. 7, 051. https://doi.org/10.1007/JHEP07(2015)051

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title = "Inclusive, prompt and non-prompt J/psi production at mid-rapidity in Pb-Pb collisions at root S-NN=2.76 TeV",

abstract = "Abstract: The transverse momentum (pT) dependence of the nuclear modification factor RAA and the centrality dependence of the average transverse momentum 〈pT〉 for inclusive J/ψ have been measured with ALICE for Pb-Pb collisions at √sNN TeV in the e+e− decay channel at mid-rapidity (|y| < 0.8). The 〈pT〉 is significantly smaller than the one observed for pp collisions at the same centre-of-mass energy. Consistently, an increase of RAA is observed towards low pT. These observations might be indicative of a sizable contribution of charm quark coalescence to the J/ψ production. Additionally, the fraction of non-prompt J/ψ from beauty hadron decays, fB, has been determined in the region 1.5 < pT< 10 GeV/c in three centrality intervals. No significant centrality dependence of fB is observed. Finally, the RAA of non-prompt J/ψ is discussed and compared with model predictions. The nuclear modification in the region 4.5 < pT< 10 GeV/c is found to be stronger than predicted by most models.",

author = "J. Adam and D. Adamov{\'a} and MM. Aggarwal and G.A. Rinella and A. Agnello and N. Agrawal and Z. Ahammed and S.U. Ahn and I. Amiot and S. Aiola and Hans B{\o}ggild and Ian Bearden and Ante Bilandzic and Christensen, {Christian Holm} and Gaardh{\o}je, {Jens J{\o}rgen} and Gulbrandsen, {Kristjan Herlache} and Hansen, {Alexander Colliander} and Nielsen, {B{\o}rge Svane} and Valentina Zaccolo and Marek Chojnacki",

year = "2015",

month = jul,

day = "25",

doi = "10.1007/JHEP07(2015)051",

language = "English",

volume = "2015",

journal = "Journal of High Energy Physics (Online)",

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T1 - Inclusive, prompt and non-prompt J/psi production at mid-rapidity in Pb-Pb collisions at root S-NN=2.76 TeV

AU - Adam, J.

AU - Adamová, D.

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, A.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahn, S.U.

AU - Amiot, I.

AU - Aiola, S.

AU - Bøggild, Hans

AU - Bearden, Ian

AU - Bilandzic, Ante

AU - Christensen, Christian Holm

AU - Gaardhøje, Jens Jørgen

AU - Gulbrandsen, Kristjan Herlache

AU - Hansen, Alexander Colliander

AU - Nielsen, Børge Svane

AU - Zaccolo, Valentina

AU - Chojnacki, Marek

PY - 2015/7/25

Y1 - 2015/7/25

N2 - Abstract: The transverse momentum (pT) dependence of the nuclear modification factor RAA and the centrality dependence of the average transverse momentum 〈pT〉 for inclusive J/ψ have been measured with ALICE for Pb-Pb collisions at √sNN TeV in the e+e− decay channel at mid-rapidity (|y| < 0.8). The 〈pT〉 is significantly smaller than the one observed for pp collisions at the same centre-of-mass energy. Consistently, an increase of RAA is observed towards low pT. These observations might be indicative of a sizable contribution of charm quark coalescence to the J/ψ production. Additionally, the fraction of non-prompt J/ψ from beauty hadron decays, fB, has been determined in the region 1.5 < pT< 10 GeV/c in three centrality intervals. No significant centrality dependence of fB is observed. Finally, the RAA of non-prompt J/ψ is discussed and compared with model predictions. The nuclear modification in the region 4.5 < pT< 10 GeV/c is found to be stronger than predicted by most models.

AB - Abstract: The transverse momentum (pT) dependence of the nuclear modification factor RAA and the centrality dependence of the average transverse momentum 〈pT〉 for inclusive J/ψ have been measured with ALICE for Pb-Pb collisions at √sNN TeV in the e+e− decay channel at mid-rapidity (|y| < 0.8). The 〈pT〉 is significantly smaller than the one observed for pp collisions at the same centre-of-mass energy. Consistently, an increase of RAA is observed towards low pT. These observations might be indicative of a sizable contribution of charm quark coalescence to the J/ψ production. Additionally, the fraction of non-prompt J/ψ from beauty hadron decays, fB, has been determined in the region 1.5 < pT< 10 GeV/c in three centrality intervals. No significant centrality dependence of fB is observed. Finally, the RAA of non-prompt J/ψ is discussed and compared with model predictions. The nuclear modification in the region 4.5 < pT< 10 GeV/c is found to be stronger than predicted by most models.

U2 - 10.1007/JHEP07(2015)051

DO - 10.1007/JHEP07(2015)051

M3 - Journal article

SN - 1126-6708

VL - 2015

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

IS - 7

M1 - 051

ER -

Inclusive, prompt and non-prompt J/psi production at mid-rapidity in Pb-Pb collisions at root S-NN=2.76 TeV

Abstract

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