Abstract
We present evidence of strong radial flow in high-multiplicity collisions. We analyze the CMS Collaboration data on the inclusive spectra of the charged pions, kaons and protons in the Large Hadron Collider TeV collisions. For 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.
- Received 3 April 2015
DOI:https://doi.org/10.1103/PhysRevC.91.054913
©2015 American Physical Society