Speaker
Tigran Kalaydzhyan
(Stony Brook University)
Description
We present an evidence of strong radial flow in high-multiplicity pp collisions. We analyze the CMS data on the inclusive spectra of the charged pions, kaons and protons in the LHC $\sqrt{s} =$ 7 TeV collisions. For $\langle N_{tracks}\rangle \ge 75$ we demonstrate the consistency of the hydrodynamic description with the (idealized) Gubser flow. Using a one parameter fit of the model to experimental data, we obtain the initial fireball size to be of the order of 1 fm. At smaller multiplicities, the fit cannot be performed which shows a limitation of the hydrodynamic approach and provides us with falsifiability of our theory.
| On behalf of collaboration: | NONE |
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Primary author
Tigran Kalaydzhyan
(Stony Brook University)
Co-author
Edward Shuryak
(stony brook university)
