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Search for collectivity with azimuthal J/[psi]-hadron correlations in high multiplicity p-Pb collisions at √sNN=5.02 and 8.16 TeV

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We present a measurement of azimuthal correlations between inclusive J/ψ and charged hadrons in p-Pb collisions recorded with the ALICE detector at the CERN LHC. The J/ψ are reconstructed at forward (p-going, 2.03<y<3.53) and backward (Pb-going, −4.46<y<−2.96) rapidity via their μ+μ− dec...

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Main Authors: Acharya, Shreyasi (Author) , Angelov, Venelin (Author) , Arslandok, Mesut (Author) , Danisch, Meike (Author) , Glässel, Peter (Author) , Kim, Jiyoung (Author) , Klewin, Sebastian (Author) , Köhler, Markus Konrad (Author) , Leardini, Lucia (Author) , Ohlson, Alice (Author) , Pachmayer, Yvonne C. (Author) , Reygers, Klaus (Author) , Schicker, Rainer (Author) , Schmidt, Marten Ole (Author) , Stachel, Johanna (Author) , Weiser, Dennis (Author) , Windelband, Bernd (Author) , Beck, Hans (Author) , Borissov, Alexander (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: 2 March 2018
In: Physics letters
Year: 2018, Volume: 780, Pages: 7-20
ISSN:1873-2445
DOI:10.1016/j.physletb.2018.02.039
Online Access:Verlag, Volltext: https://doi.org/10.1016/j.physletb.2018.02.039
Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0370269318301412
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Author Notes:ALICE Collaboration*
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Summary:We present a measurement of azimuthal correlations between inclusive J/ψ and charged hadrons in p-Pb collisions recorded with the ALICE detector at the CERN LHC. The J/ψ are reconstructed at forward (p-going, 2.03<y<3.53) and backward (Pb-going, −4.46<y<−2.96) rapidity via their μ+μ− decay channel, while the charged hadrons are reconstructed at mid-rapidity (|η|<1.8). The correlations are expressed in terms of associated charged-hadron yields per J/ψ trigger. A rapidity gap of at least 1.5 units is required between the trigger J/ψ and the associated charged hadrons. Possible correlations due to collective effects are assessed by subtracting the associated per-trigger yields in the low-multiplicity collisions from those in the high-multiplicity collisions. After the subtraction, we observe a strong indication of remaining symmetric structures at Δφ≈0 and Δφ≈π, similar to those previously found in two-particle correlations at middle and forward rapidity. The corresponding second-order Fourier coefficient (v2) in the transverse momentum interval between 3 and 6 GeV/c is found to be positive with a significance of about 5σ. The obtained results are similar to the J/ψ v2 coefficients measured in Pb-Pb collisions at sNN=5.02 TeV, suggesting a common mechanism at the origin of the J/ψ v2.
Item Description:Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol, "NN" ist dabei tiefgestellt
ALICE Collaboration: S. Acharya, V. Anguelov, M. Arslandok, H. Beck, A. Borissov, M.C. Danisch, P. Glässel, J. Kim, S. Klewin, M.K. Köhler, L. Leardini, A. Ohlson, Y. Pachmayer, K. Reygers, R. Schicker, M.O. Schmidt, J. Stachel, D.F. Weiser, B. Windelband [und weitere]
Gesehen am 01.07.2019
Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2018.02.039

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