Measurement of an Excess in the Yield of J/ψ at Very Low pT in Pb-Pb Collisions at √sNN=2.76 TeV (Englisch)

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We report on the first measurement of an excess in the yield of J/ψ at very low transverse momentum (pT<0.3 GeV/c) in peripheral hadronic Pb-Pb collisions at sNN=2.76 TeV, performed by ALICE at the CERN LHC. Remarkably, the measured nuclear modification factor of J/ψ in the rapidity range 2.5