Abstract: The transverse momentum (p<inf>T</inf>) dependence of the nuclear modification factor R<inf>AA</inf> and the centrality dependence of the average transverse momentum 〈p<inf>T</inf>〉 for inclusive J/ψ have been measured with ALICE for Pb-Pb collisions at √s<inf>NN</inf> TeV in the e+e− decay channel at mid-rapidity (|y| < 0.8). The 〈p<inf>T</inf>〉 is significantly smaller than the one observed for pp collisions at the same centre-of-mass energy. Consistently, an increase of R<inf>AA</inf> is observed towards low p<inf>T</inf>. 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<inf>B</inf>, has been determined in the region 1.5 < p<inf>T</inf>< 10 GeV/c in three centrality intervals. No significant centrality dependence of f<inf>B</inf> is observed. Finally, the R<inf>AA</inf> of non-prompt J/ψ is discussed and compared with model predictions. The nuclear modification in the region 4.5 < p<inf>T</inf>< 10 GeV/c is found to be stronger than predicted by most models. © 2015, The Author(s).

Inclusive, prompt and non-prompt J/ψ production at mid-rapidity in Pb-Pb collisions at √s_NN = 2.76 TeV / Adam, J., Adamová, D., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S.U., Aimo, I., Aiola, S., Ajaz, M., Akindinov, A., Alam, S.N., Aleksandrov, D., Alessandro, B., Alexandre, D., Alfaro Molina, R., Alici, A., Alkin, A., Alme, J., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2015:7(2015). [10.1007/JHEP07(2015)051]

Inclusive, prompt and non-prompt J/ψ production at mid-rapidity in Pb-Pb collisions at √s_NN = 2.76 TeV

BRUNO, Giuseppe Eugenio;
2015

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. © 2015, The Author(s).
2015
http://link.springer.com/journal/13130
Inclusive, prompt and non-prompt J/ψ production at mid-rapidity in Pb-Pb collisions at √s_NN = 2.76 TeV / Adam, J., Adamová, D., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S.U., Aimo, I., Aiola, S., Ajaz, M., Akindinov, A., Alam, S.N., Aleksandrov, D., Alessandro, B., Alexandre, D., Alfaro Molina, R., Alici, A., Alkin, A., Alme, J., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2015:7(2015). [10.1007/JHEP07(2015)051]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/60356
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