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Nuclear-modification factor of charged hadrons at forward and backward rapidity in p + Al and p + Au collisions at sNN =200 GeV

Aidala, C. ; Oskarsson, Anders LU ; Silvermyr, David LU orcid and Zou, L. (2020) In Physical Review C 101(3).
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... (More)
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. (Less)
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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C
volume
101
issue
3
article number
034910
publisher
American Physical Society
external identifiers
  • scopus:85082688747
ISSN
2469-9985
DOI
10.1103/PhysRevC.101.034910
language
English
LU publication?
yes
id
a62a7318-e278-41af-bb5a-8bdee5e2b733
date added to LUP
2020-04-23 16:34:36
date last changed
2025-04-04 14:03:28
@article{a62a7318-e278-41af-bb5a-8bdee5e2b733,
  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&lt;η&lt;2.4, p-going direction) and backward rapidity (-2.2&lt;η&lt;-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.}},
  author       = {{Aidala, C. and Oskarsson, Anders and Silvermyr, David and Zou, L.}},
  issn         = {{2469-9985}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{3}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Nuclear-modification factor of charged hadrons at forward and backward rapidity in p + Al and p + Au collisions at sNN =200 GeV}},
  url          = {{http://dx.doi.org/10.1103/PhysRevC.101.034910}},
  doi          = {{10.1103/PhysRevC.101.034910}},
  volume       = {{101}},
  year         = {{2020}},
}