Papers › Blast-wave description of Υ elliptic flow at energies available at the CERN Large...
Blast-wave description of Υ elliptic flow at energies available at the CERN Large Hadron Collider
Klaus Reygers, Alexander Schmah, Anastasia Berdnikova, Xu Sun
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A simultaneous blast-wave fit to particle yields and elliptic flow (v₂) measured as a function of transverse momentum in Pb-Pb collisions at LHC energies is presented. A compact formula for the calculation of v₂(p_T) for an elliptic freeze-out surface is used which follows from the Cooper-Frye ansatz without further assumptions. Over the full available p_T range, the Υ elliptic flow data is described by the prediction based on the fit to lighter particles. This prediction shows that, due to the large Υ mass, a sizable elliptic flow is only expected at transverse momenta above 10 GeV/c.
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