TY - JOUR
T1 - Suppression of ψ(2S) production in p-Pb collisions at √sNN = 5.02 TeV
AU - The ALICE collaboration
AU - Abelev, B.
AU - Adam, J.
AU - Adamová, D.
AU - Aggarwal, M. M.
AU - Agnello, M.
AU - Agostinelli, A.
AU - Agrawal, N.
AU - Ahammed, Z.
AU - Ahmad, N.
AU - Ahmed, I.
AU - Ahn, S. U.
AU - Ahn, S. A.
AU - Aimo, I.
AU - Aiola, S.
AU - Ajaz, M.
AU - Akindinov, A.
AU - Alam, S. N.
AU - Aleksandrov, D.
AU - Alessandro, B.
AU - Alexandre, D.
AU - Alici, A.
AU - Alkin, A.
AU - Alme, J.
AU - Alt, T.
AU - Altinpinar, S.
AU - Altsybeev, I.
AU - Alves Garcia Prado, C.
AU - Andrei, C.
AU - Andronic, A.
AU - Anguelov, V.
AU - Anielski, J.
AU - Antičić, T.
AU - Antinori, F.
AU - Antonioli, P.
AU - Aphecetche, L.
AU - Appelshäuser, H.
AU - Arcelli, S.
AU - Armesto, N.
AU - Arnaldi, R.
AU - Aronsson, T.
AU - Arsene, I. C.
AU - Arslandok, M.
AU - Augustinus, A.
AU - Averbeck, R.
AU - Awes, T. C.
AU - Azmi, M. D.
AU - Bach, M.
AU - Badalà, A.
AU - Kang, J. H.
AU - Kwon, Y.
N1 - Publisher Copyright:
© 2014, The Author(s).
PY - 2014
Y1 - 2014
N2 - Abstract: The ALICE Collaboration has studied the inclusive production of the charmonium state ψ(2S) in proton-lead (p-Pb) collisions at the nucleon-nucleon centre of mass energy (formula presented.) = 5.02 TeV at the CERN LHC. The measurement was performed at forward (2.03 < ycms< 3.53) and backward (−4.46 < ycms< −2.96) centre of mass rapidities, studying the decays into muon pairs. In this paper, we present the inclusive production cross sections σψ(2S), both integrated and as a function of the transverse momentum pT, for the two ycms domains. The results are compared to those obtained for the 1S vector state (J/ψ), by showing the ratios between the production cross sections, as well as the double ratios [σψ(2S)/σJ/ψ ]pPb/[σψ(2S)/σJ/ψ]pp between p-Pb and proton-proton collisions. Finally, the nuclear modification factor for inclusive ψ(2S) is evaluated and compared to the measurement of the same quantity for J/ψ and to theoretical models including parton shadowing and coherent energy loss mechanisms. The results show a significantly larger suppression of the ψ(2S) compared to that measured for J/ψ and to models. These observations represent a clear indication for sizeable final state effects on ψ(2S) production.[Figure not available: see fulltext.
AB - Abstract: The ALICE Collaboration has studied the inclusive production of the charmonium state ψ(2S) in proton-lead (p-Pb) collisions at the nucleon-nucleon centre of mass energy (formula presented.) = 5.02 TeV at the CERN LHC. The measurement was performed at forward (2.03 < ycms< 3.53) and backward (−4.46 < ycms< −2.96) centre of mass rapidities, studying the decays into muon pairs. In this paper, we present the inclusive production cross sections σψ(2S), both integrated and as a function of the transverse momentum pT, for the two ycms domains. The results are compared to those obtained for the 1S vector state (J/ψ), by showing the ratios between the production cross sections, as well as the double ratios [σψ(2S)/σJ/ψ ]pPb/[σψ(2S)/σJ/ψ]pp between p-Pb and proton-proton collisions. Finally, the nuclear modification factor for inclusive ψ(2S) is evaluated and compared to the measurement of the same quantity for J/ψ and to theoretical models including parton shadowing and coherent energy loss mechanisms. The results show a significantly larger suppression of the ψ(2S) compared to that measured for J/ψ and to models. These observations represent a clear indication for sizeable final state effects on ψ(2S) production.[Figure not available: see fulltext.
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U2 - 10.1007/JHEP12(2014)073
DO - 10.1007/JHEP12(2014)073
M3 - Article
AN - SCOPUS:84918578120
VL - 2014
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1126-6708
IS - 12
M1 - 73
ER -