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Suppression of $\Upsilon (1S)$ at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV

The ALICE collaboration
Phys.Lett. B738 (2014) 361-372, 2014

Abstract (data abstract)
CERN-LHC. We report on the measurement of the inclusive Upsilon(1S) production in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV carried out at forward rapidity (2.5 < y < 4) and down to zero transverse momentum using its mu+ mu- decay channel with the ALICE detector at the Large Hadron Collider. A strong suppression of the inclusive Upsilon(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 Upsilon(1S) suppression increases with the centrality of the collision and is more pronounced than in corresponding mid-rapidity measurements.

  • Table 1

    Data from Figure 2

    10.17182/hepdata.64436.v1/t1

    Inclusive Upsilon (1S) Nuclear Modification Factor (Raa) measured in Lead-Lead collisions at sqrt(sNN) = 2.76 TeV in 2.5 < y...

  • Table 2

    Data from Figure 4

    10.17182/hepdata.64436.v1/t2

    Inclusive Upsilon (1S) Nuclear Modification Factor (Raa) measured in Lead-Lead collisions at sqrt(sNN) = 2.76 TeV in 2.5 < y...

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