We report on the measurement of the inclusive ϒhooked(1S) production in Pb-Pb collisions at sNN=2.76 TeV carried out at forward rapidity (2.5<y<4) and down to zero transverse momentum using its μ+μ- decay channel with the ALICE detector at the Large Hadron Collider. A strong suppression of the inclusive ϒhooked(1S) yield is observed with respect to pp collisions scaled by the number of independent nucleon-nucleon collisions. The nuclear modification factor, for events in the 0-90% centrality range, amounts to 0.30±0.05(stat)±0.04(syst). The observed ϒhooked(1S) suppression tends to increase with the centrality of the collision and seems more pronounced than in corresponding mid-rapidity measurements. Our results are compared with model calculations, which are found to underestimate the measured suppression and fail to reproduce its rapidity dependence. © 2014 The Authors.

Suppression of ϒ(1S) at forward rapidity in Pb-Pb collisions at sNN=2.76 TeV / Abelev, B., Adam, J., Adamová, D., Aggarwal, M.M., Agnello, M., Agostinelli, A., Agrawal, N., Ahammed, Z., Ahmad, N., Ahmed, I., Ahn, S.U., Ahn, S.A., Aimo, I., Aiola, S., Ajaz, M., Akindinov, A., Alam, S.N., Aleksandrov, D., Alessandro, B., Alexandre, D., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 738:(2014), pp. 361-372. [10.1016/j.physletb.2014.10.001]

Suppression of ϒ(1S) at forward rapidity in Pb-Pb collisions at sNN=2.76 TeV

BRUNO, Giuseppe Eugenio;
2014

Abstract

We report on the measurement of the inclusive ϒhooked(1S) production in Pb-Pb collisions at sNN=2.76 TeV carried out at forward rapidity (2.5
2014
Suppression of ϒ(1S) at forward rapidity in Pb-Pb collisions at sNN=2.76 TeV / Abelev, B., Adam, J., Adamová, D., Aggarwal, M.M., Agnello, M., Agostinelli, A., Agrawal, N., Ahammed, Z., Ahmad, N., Ahmed, I., Ahn, S.U., Ahn, S.A., Aimo, I., Aiola, S., Ajaz, M., Akindinov, A., Alam, S.N., Aleksandrov, D., Alessandro, B., Alexandre, D., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 738:(2014), pp. 361-372. [10.1016/j.physletb.2014.10.001]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/56998
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