Abstract
Collisions between prolate uranium nuclei are used to study how particle production and azimuthal anisotropies depend on initial geometry in heavy-ion collisions. We report the two- and four-particle cumulants, and , for charged hadrons from collisions at and collisions at . Nearly fully overlapping collisions are selected based on the energy deposited by spectators in zero degree calorimeters (ZDCs). Within this sample, the observed dependence of on multiplicity demonstrates that ZDC information combined with multiplicity can preferentially select different overlap configurations in collisions. We also show that vs multiplicity can be better described by models, such as gluon saturation or quark participant models, that eliminate the dependence of the multiplicity on the number of binary nucleon-nucleon collisions.
- Received 28 May 2015
DOI:https://doi.org/10.1103/PhysRevLett.115.222301
© 2015 American Physical Society