Speaker
Prof.
Giorgio Torrieri
(IFGW Unicamp)
Description
We argue that heavy ion data, taken as a whole, presents scaling patterns ( the scaling of v2 between large and small systems, the scaling of v2 with multiplicity across energies, the near energy-independence of v2(pT), the presence of photon v2) which look too simple to be described by a non-linear multi-parameter theory such as hydrodynamics.
In particular, we remark that such scaling behavior resembles the approximate Bjorken scaling of parton distribution functions, and could be naturally explained if "somehow", parton distribution functions aquired an angular dependence.
We speculate on how this could occur, focusing on the stability structure of the GLR (Gribov-Levin Ryskin equation) when its full 2+1 dimensional structure is considered. Via a linearized solution, we isolate a regime in which azimuthal perturbations grow with ln(1/x).
| On behalf of collaboration: | NONE |
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Author
Prof.
Giorgio Torrieri
(IFGW Unicamp)
Co-author
Mr
Guillermo Gambini
(IFGW Unicamp)
