J/Psi suppression at forward rapidity in Pb-Pb collisions at root s(NN)=5.02 TeV

J. Adam; D. Adamova; MM. Aggarwal; G.A. Rinella; Maria Agnello; N. Agrawal; Z. Ahammed; Shafqat Ahmad; S. U. Ahn; S. Aiola; A. Akindinov; SN Alam; DSD Albuquerque; D. Aleksandrov; B. Alessandro; Ian Bearden; Christian Holm Christensen; Kristjan Herlache Gulbrandsen; Jens Jørgen Gaardhøje; Børge Svane Nielsen; Ante Bilandzic; Marek Chojnacki; Valentina Zaccolo; You Zhou; Christian Alexander Bourjau; Lais Ozelin de Lima Pimentel; Katarina Gajdosova; Vojtech Pacik

doi:10.1016/j.physletb.2016.12.064

J/Psi suppression at forward rapidity in Pb-Pb collisions at root s(NN)=5.02 TeV

J. Adam, D. Adamova, MM. Aggarwal, G.A. Rinella, Maria Agnello, N. Agrawal, Z. Ahammed, Shafqat Ahmad, S. U. Ahn, S. Aiola, A. Akindinov, SN Alam, DSD Albuquerque, D. Aleksandrov, B. Alessandro, Ian Bearden, Christian Holm Christensen, Kristjan Herlache Gulbrandsen, Jens Jørgen Gaardhøje, Børge Svane NielsenAnte Bilandzic, Marek Chojnacki, Valentina Zaccolo, You Zhou, Christian Alexander Bourjau, Lais Ozelin de Lima Pimentel, Katarina Gajdosova, Vojtech Pacik

Experimental Particle Physics

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Abstract

The inclusive J/ψ production has been studied in Pb–Pb and pp collisions at the centre-of-mass energy per nucleon pair s_NN=5.02 TeV, using the ALICE detector at the CERN LHC. The J/ψ meson is reconstructed, in the centre-of-mass rapidity interval 2.5>y<4 and in the transverse-momentum range p_T<12 GeV/c, via its decay to a muon pair. In this Letter, we present results on the inclusive J/ψ cross section in pp collisions at s=5.02 TeV and on the nuclear modification factor R_AA. The latter is presented as a function of the centrality of the collision and, for central collisions, as a function of the transverse momentum p_T of the J/ψ. The measured R_AA values indicate a suppression of the J/ψ in nuclear collisions and are then compared to our previous results obtained in Pb–Pb collisions at s_NN=2.76 TeV. The ratio of the R_AA values at the two energies is also computed and compared to calculations of statistical and dynamical models. The numerical value of the ratio for central events (0–10% centrality) is 1.17±0.04(stat)±0.20(syst). In central events, as a function of p_T, a slight increase of R_AA with collision energy is visible in the region 2<p_T<6 GeV/c. Theoretical calculations qualitatively describe the measurements, within uncertainties.

Original language	English
Journal	Physics Letters B
Volume	766
Pages (from-to)	212-224
ISSN	0370-2693
DOIs	https://doi.org/10.1016/j.physletb.2016.12.064
Publication status	Published - 10 Mar 2017

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Adam, J., Adamova, D., Aggarwal, MM., Rinella, G. A., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., U. Ahn, S., Aiola, S., Akindinov, A., Alam, SN., Albuquerque, DSD., Aleksandrov, D., Alessandro, B., Bearden, I., Christensen, C. H., Gulbrandsen, K. H., Gaardhøje, J. J., ... Pacik, V. (2017). J/Psi suppression at forward rapidity in Pb-Pb collisions at root s(NN)=5.02 TeV. Physics Letters B, 766, 212-224. https://doi.org/10.1016/j.physletb.2016.12.064

Adam, J, Adamova, D, Aggarwal, MM, Rinella, GA, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, U. Ahn, S, Aiola, S, Akindinov, A, Alam, SN, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Bearden, I , Christensen, CH , Gulbrandsen, KH , Gaardhøje, JJ , Nielsen, BS, Bilandzic, A, Chojnacki, M, Zaccolo, V, Zhou, Y, Bourjau, CA, Pimentel, LODL, Gajdosova, K & Pacik, V 2017, 'J/Psi suppression at forward rapidity in Pb-Pb collisions at root s(NN)=5.02 TeV', Physics Letters B, vol. 766, pp. 212-224. https://doi.org/10.1016/j.physletb.2016.12.064

@article{009ba76f88c14073a867d7fda70ae5e0,

title = "J/Psi suppression at forward rapidity in Pb-Pb collisions at root s(NN)=5.02 TeV",

abstract = "The inclusive J/ψ production has been studied in Pb–Pb and pp collisions at the centre-of-mass energy per nucleon pair sNN=5.02 TeV, using the ALICE detector at the CERN LHC. The J/ψ meson is reconstructed, in the centre-of-mass rapidity interval 2.5>y<4 and in the transverse-momentum range pT<12 GeV/c, via its decay to a muon pair. In this Letter, we present results on the inclusive J/ψ cross section in pp collisions at s=5.02 TeV and on the nuclear modification factor RAA. The latter is presented as a function of the centrality of the collision and, for central collisions, as a function of the transverse momentum pT of the J/ψ. The measured RAA values indicate a suppression of the J/ψ in nuclear collisions and are then compared to our previous results obtained in Pb–Pb collisions at sNN=2.76 TeV. The ratio of the RAA values at the two energies is also computed and compared to calculations of statistical and dynamical models. The numerical value of the ratio for central events (0–10% centrality) is 1.17±0.04(stat)±0.20(syst). In central events, as a function of pT, a slight increase of RAA with collision energy is visible in the region 2T<6 GeV/c. Theoretical calculations qualitatively describe the measurements, within uncertainties.",

author = "J. Adam and D. Adamova and MM. Aggarwal and G.A. Rinella and Maria Agnello and N. Agrawal and Z. Ahammed and Shafqat Ahmad and {U. Ahn}, S. and S. Aiola and A. Akindinov and SN Alam and DSD Albuquerque and D. Aleksandrov and B. Alessandro and Ian Bearden and Christensen, {Christian Holm} and Gulbrandsen, {Kristjan Herlache} and Gaardh{\o}je, {Jens J{\o}rgen} and Nielsen, {B{\o}rge Svane} and Ante Bilandzic and Marek Chojnacki and Valentina Zaccolo and You Zhou and Bourjau, {Christian Alexander} and Pimentel, {Lais Ozelin de Lima} and Katarina Gajdosova and Vojtech Pacik",

year = "2017",

month = mar,

day = "10",

doi = "10.1016/j.physletb.2016.12.064",

language = "English",

volume = "766",

pages = "212--224",

journal = "Physics Letters B: Particle Physics, Nuclear Physics and Cosmology",

issn = "0370-2693",

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TY - JOUR

T1 - J/Psi suppression at forward rapidity in Pb-Pb collisions at root s(NN)=5.02 TeV

AU - Adam, J.

AU - Adamova, D.

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, Maria

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, Shafqat

AU - U. Ahn, S.

AU - Aiola, S.

AU - Akindinov, A.

AU - Alam, SN

AU - Albuquerque, DSD

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Bearden, Ian

AU - Christensen, Christian Holm

AU - Gulbrandsen, Kristjan Herlache

AU - Gaardhøje, Jens Jørgen

AU - Nielsen, Børge Svane

AU - Bilandzic, Ante

AU - Chojnacki, Marek

AU - Zaccolo, Valentina

AU - Zhou, You

AU - Bourjau, Christian Alexander

AU - Pimentel, Lais Ozelin de Lima

AU - Gajdosova, Katarina

AU - Pacik, Vojtech

PY - 2017/3/10

Y1 - 2017/3/10

N2 - The inclusive J/ψ production has been studied in Pb–Pb and pp collisions at the centre-of-mass energy per nucleon pair sNN=5.02 TeV, using the ALICE detector at the CERN LHC. The J/ψ meson is reconstructed, in the centre-of-mass rapidity interval 2.5>y<4 and in the transverse-momentum range pT<12 GeV/c, via its decay to a muon pair. In this Letter, we present results on the inclusive J/ψ cross section in pp collisions at s=5.02 TeV and on the nuclear modification factor RAA. The latter is presented as a function of the centrality of the collision and, for central collisions, as a function of the transverse momentum pT of the J/ψ. The measured RAA values indicate a suppression of the J/ψ in nuclear collisions and are then compared to our previous results obtained in Pb–Pb collisions at sNN=2.76 TeV. The ratio of the RAA values at the two energies is also computed and compared to calculations of statistical and dynamical models. The numerical value of the ratio for central events (0–10% centrality) is 1.17±0.04(stat)±0.20(syst). In central events, as a function of pT, a slight increase of RAA with collision energy is visible in the region 2T<6 GeV/c. Theoretical calculations qualitatively describe the measurements, within uncertainties.

AB - The inclusive J/ψ production has been studied in Pb–Pb and pp collisions at the centre-of-mass energy per nucleon pair sNN=5.02 TeV, using the ALICE detector at the CERN LHC. The J/ψ meson is reconstructed, in the centre-of-mass rapidity interval 2.5>y<4 and in the transverse-momentum range pT<12 GeV/c, via its decay to a muon pair. In this Letter, we present results on the inclusive J/ψ cross section in pp collisions at s=5.02 TeV and on the nuclear modification factor RAA. The latter is presented as a function of the centrality of the collision and, for central collisions, as a function of the transverse momentum pT of the J/ψ. The measured RAA values indicate a suppression of the J/ψ in nuclear collisions and are then compared to our previous results obtained in Pb–Pb collisions at sNN=2.76 TeV. The ratio of the RAA values at the two energies is also computed and compared to calculations of statistical and dynamical models. The numerical value of the ratio for central events (0–10% centrality) is 1.17±0.04(stat)±0.20(syst). In central events, as a function of pT, a slight increase of RAA with collision energy is visible in the region 2T<6 GeV/c. Theoretical calculations qualitatively describe the measurements, within uncertainties.

U2 - 10.1016/j.physletb.2016.12.064

DO - 10.1016/j.physletb.2016.12.064

M3 - Journal article

SN - 0370-2693

VL - 766

SP - 212

EP - 224

JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

ER -

J/Psi suppression at forward rapidity in Pb-Pb collisions at root s(NN)=5.02 TeV

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