Document Type
Article
Publication Date
3-16-2020
DOI
10.1103/PhysRevC.101.034910
Abstract
The PHENIX experiment has studied nuclear effects in p+Al and p+Au collisions at √sNN=200GeV on charged hadron production at forward rapidity (1.4<η<2.4, p-going direction) and backward rapidity (−2.2<η<−1.2, A-going direction). Such effects are quantified by measuring nuclear modification factors as a function of transverse momentum and pseudorapidity in various collision multiplicity selections. In central p+Al and p+Au collisions, a suppression (enhancement) is observed at forward (backward) rapidity compared to the binary scaled yields in p+p collisions. The magnitude of enhancement at backward rapidity is larger in p+Au collisions than in p+Al collisions, which have a smaller number of participating nucleons. However, the results at forward rapidity show a similar suppression within uncertainties. The results in the integrated centrality are compared with calculations using nuclear parton distribution functions, which show a reasonable agreement at the forward rapidity but fail to describe the backward rapidity enhancement.
Recommended Citation
Daugherity, Mike; Isenhower, Donald; and Towell, Rusty, "Nuclear-modification factor of charged hadrons at forward and backward rapidity in p + Al and p + Au collisions at √sNN=200GeV" (2020). Engineering and Physics. 22.
https://digitalcommons.acu.edu/engineer_physics/22
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.