Hidden asymmetry and long range rapidity correlations
arXiv:1107.1215 · doi:10.1016/j.physletb.2012.03.008
Abstract
Interpretation of long-range rapidity correlations in terms of the fluctuating rapidity density distribution of the system created in high-energy collisions is proposed. When applied to recent data of the STAR coll., it shows a substantial asymmetric component in the shape of this system in central Au-Au collisions, implying that boost invariance is violated on the event-by-event basis even at central rapidity. This effect may seriously influence the hydrodynamic expansion of the system.
9 pages, new section 5 with comments, to appear in Phys. Lett. B