Blast-wave description of ${\rm Y}$ elliptic flow at energies available at the CERN Large Hadron Collider

Abstract

A simultaneous blast-wave fit to particle yields and elliptic flow ($v_2$) measured as a function of transverse momentum in Pb-Pb collisions at LHC energies is presented. A compact formula for the calculation of $v_2(p_T)$ 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 ${\rm Y}$ elliptic flow data is described by the prediction based on the fit to lighter particles. This prediction shows that, due to the large ${\rm Y}$ mass, a sizable elliptic flow is only expected at transverse momenta above 10 GeV/$c$.

arXiv comment9 pages, 5 figures, published version

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• Soft-dielectron excess in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Bottomonium spectroscopy in the quark-gluon plasma
• Dielectron production at midrapidity at low transverse momentum in peripheral and semi-peripheral Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Blast-wave-Tsallis-power model for $p_{\mathrm{T}}$-spectra and elliptic flow $v_2$ of hadrons in collisions of identical nuclei at energies available at the Large Hadron Collider