J/psi Elliptic Flow in Pb-Pb Collisions at root s(NN)=5.02 TeV

S. Acharya; D. Adamova; J Adolfsson; MM. Aggarwal; G.A. Rinella; A. Agnello; N. Agrawal; Z. Ahammed; S. U. Ahn; S. Aiola; A. Akindinov; M. Al-Turany; SN Alam; DSD Albuquerque; D. Aleksandrov; B. Alessandro; Ricardo Molina; Yusuf Ali; 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:10.1103/PhysRevLett.119.242301

J/psi Elliptic Flow in Pb-Pb Collisions at root s(NN)=5.02 TeV

S. Acharya, D. Adamova, J Adolfsson, MM. Aggarwal, G.A. Rinella, A. Agnello, N. Agrawal, Z. Ahammed, S. U. Ahn, S. Aiola, A. Akindinov, M. Al-Turany, SN Alam, DSD Albuquerque, D. Aleksandrov, B. Alessandro, Ricardo Molina, Yusuf Ali, Ian Bearden, Christian Holm ChristensenKristjan 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

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Abstract

We report a precise measurement of the J/ψ elliptic flow in Pb-Pb collisions at sNN=5.02 TeV with the ALICE detector at the LHC. The J/ψ mesons are reconstructed at midrapidity (|y|<0.9) in the dielectron decay channel and at forward rapidity (2.5<y<4.0) in the dimuon channel, both down to zero transverse momentum. At forward rapidity, the elliptic flow v2 of the J/ψ is studied as a function of the transverse momentum and centrality. A positive v2 is observed in the transverse momentum range 2<pT<8 GeV/c in the three centrality classes studied and confirms with higher statistics our earlier results at sNN=2.76 TeV in semicentral collisions. At midrapidity, the J/ψ v2 is investigated as a function of the transverse momentum in semicentral collisions and found to be in agreement with the measurements at forward rapidity. These results are compared to transport model calculations. The comparison supports the idea that at low pT the elliptic flow of the J/ψ originates from the thermalization of charm quarks in the deconfined medium but suggests that additional mechanisms might be missing in the models.

Originalsprog	Engelsk
Artikelnummer	242301
Tidsskrift	Physical Review Letters
Vol/bind	119
Udgave nummer	24
ISSN	0031-9007
DOI	https://doi.org/10.1103/PhysRevLett.119.242301
Status	Udgivet - 15 dec. 2017

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10.1103/PhysRevLett.119.242301Licens: CC BY

PhysRevLett.119.242301Forlagets udgivne version, 461 KBLicens: CC BY

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Acharya, S., Adamova, D., Adolfsson, J., Aggarwal, MM., Rinella, G. A., Agnello, A., Agrawal, N., Ahammed, Z., U. Ahn, S., Aiola, S., Akindinov, A., Al-Turany, M., Alam, SN., Albuquerque, DSD., Aleksandrov, D., Alessandro, B., Molina, R., Ali, Y., Bearden, I., ... Pacik, V. (2017). J/psi Elliptic Flow in Pb-Pb Collisions at root s(NN)=5.02 TeV. Physical Review Letters, 119(24), [242301]. https://doi.org/10.1103/PhysRevLett.119.242301

Acharya, S, Adamova, D, Adolfsson, J, Aggarwal, MM, Rinella, GA, Agnello, A, Agrawal, N, Ahammed, Z, U. Ahn, S, Aiola, S, Akindinov, A, Al-Turany, M, Alam, SN, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Molina, R, Ali, Y, 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 Elliptic Flow in Pb-Pb Collisions at root s(NN)=5.02 TeV', Physical Review Letters, bind 119, nr. 24, 242301. https://doi.org/10.1103/PhysRevLett.119.242301

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abstract = "We report a precise measurement of the J/ψ elliptic flow in Pb-Pb collisions at sNN=5.02 TeV with the ALICE detector at the LHC. The J/ψ mesons are reconstructed at midrapidity (|y|<0.9) in the dielectron decay channel and at forward rapidity (2.5",

author = "S. Acharya and D. Adamova and J Adolfsson and MM. Aggarwal and G.A. Rinella and A. Agnello and N. Agrawal and Z. Ahammed and {U. Ahn}, S. and S. Aiola and A. Akindinov and M. Al-Turany and SN Alam and DSD Albuquerque and D. Aleksandrov and B. Alessandro and Ricardo Molina and Yusuf Ali 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",

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doi = "10.1103/PhysRevLett.119.242301",

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T1 - J/psi Elliptic Flow in Pb-Pb Collisions at root s(NN)=5.02 TeV

AU - Acharya, S.

AU - Adamova, D.

AU - Adolfsson, J

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, A.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - U. Ahn, S.

AU - Aiola, S.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Alam, SN

AU - Albuquerque, DSD

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Molina, Ricardo

AU - Ali, Yusuf

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 - 2017/12/15

Y1 - 2017/12/15

N2 - We report a precise measurement of the J/ψ elliptic flow in Pb-Pb collisions at sNN=5.02 TeV with the ALICE detector at the LHC. The J/ψ mesons are reconstructed at midrapidity (|y|<0.9) in the dielectron decay channel and at forward rapidity (2.5

AB - We report a precise measurement of the J/ψ elliptic flow in Pb-Pb collisions at sNN=5.02 TeV with the ALICE detector at the LHC. The J/ψ mesons are reconstructed at midrapidity (|y|<0.9) in the dielectron decay channel and at forward rapidity (2.5

U2 - 10.1103/PhysRevLett.119.242301

DO - 10.1103/PhysRevLett.119.242301

M3 - Journal article

C2 - 29286736

SN - 0031-9007

VL - 119

JO - Physical Review Letters

JF - Physical Review Letters

IS - 24

M1 - 242301

ER -

J/psi Elliptic Flow in Pb-Pb Collisions at root s(NN)=5.02 TeV

Abstract

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