Nuclear Dependence of the Transverse-Single-Spin Asymmetry for Forward Neutron Production in Polarized p+A Collisions at sNN =200 GeV
Aidala, C. ; Akiba, Y. ; Alfred, M. ; Andrieux, V. ; Aoki, K. ; Apadula, N. ; Oskarsson, Anders LU and Silvermyr, David LU
(2018)
In Physical Review Letters
120(2).
- Abstract
- During 2015, the Relativistic Heavy Ion Collider (RHIC) provided collisions of transversely polarized protons with Au and Al nuclei for the first time, enabling the exploration of transverse-single-spin asymmetries with heavy nuclei. Large single-spin asymmetries in very forward neutron production have been previously observed in transversely polarized p+p collisions at RHIC, and the existing theoretical framework that was successful in describing the single-spin asymmetry in p+p collisions predicts only a moderate atomic-mass-number (A) dependence. In contrast, the asymmetries observed at RHIC in p+A collisions showed a surprisingly strong A dependence in inclusive forward neutron production. The observed asymmetry in p+Al collisions is... (More)
- During 2015, the Relativistic Heavy Ion Collider (RHIC) provided collisions of transversely polarized protons with Au and Al nuclei for the first time, enabling the exploration of transverse-single-spin asymmetries with heavy nuclei. Large single-spin asymmetries in very forward neutron production have been previously observed in transversely polarized p+p collisions at RHIC, and the existing theoretical framework that was successful in describing the single-spin asymmetry in p+p collisions predicts only a moderate atomic-mass-number (A) dependence. In contrast, the asymmetries observed at RHIC in p+A collisions showed a surprisingly strong A dependence in inclusive forward neutron production. The observed asymmetry in p+Al collisions is much smaller, while the asymmetry in p+Au collisions is a factor of 3 larger in absolute value and of opposite sign. The interplay of different neutron production mechanisms is discussed as a possible explanation of the observed A dependence. © 2018 authors. Published by the American Physical Society. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3bc114de-4a14-4665-bf5d-ba9d4aa9700c
- author
- Aidala, C.
; Akiba, Y.
; Alfred, M.
; Andrieux, V.
; Aoki, K.
; Apadula, N.
; Oskarsson, Anders
LU
and Silvermyr, David
LU
- author collaboration
- organization
- publishing date
- 2018
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 120
- issue
- 2
- article number
- 022001
- publisher
- American Physical Society
- external identifiers
-
- scopus:85040457713
- pmid:29376675
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.120.022001
- language
- English
- LU publication?
- yes
- additional info
- Export Date: 22 January 2018
- id
- 3bc114de-4a14-4665-bf5d-ba9d4aa9700c
- date added to LUP
- 2018-01-22 12:37:39
- date last changed
- 2023-04-08 06:10:11
@article{3bc114de-4a14-4665-bf5d-ba9d4aa9700c,
abstract = {{During 2015, the Relativistic Heavy Ion Collider (RHIC) provided collisions of transversely polarized protons with Au and Al nuclei for the first time, enabling the exploration of transverse-single-spin asymmetries with heavy nuclei. Large single-spin asymmetries in very forward neutron production have been previously observed in transversely polarized p+p collisions at RHIC, and the existing theoretical framework that was successful in describing the single-spin asymmetry in p+p collisions predicts only a moderate atomic-mass-number (A) dependence. In contrast, the asymmetries observed at RHIC in p+A collisions showed a surprisingly strong A dependence in inclusive forward neutron production. The observed asymmetry in p+Al collisions is much smaller, while the asymmetry in p+Au collisions is a factor of 3 larger in absolute value and of opposite sign. The interplay of different neutron production mechanisms is discussed as a possible explanation of the observed A dependence. © 2018 authors. Published by the American Physical Society.}},
author = {{Aidala, C. and Akiba, Y. and Alfred, M. and Andrieux, V. and Aoki, K. and Apadula, N. and Oskarsson, Anders and Silvermyr, David}},
issn = {{1079-7114}},
language = {{eng}},
number = {{2}},
publisher = {{American Physical Society}},
series = {{Physical Review Letters}},
title = {{Nuclear Dependence of the Transverse-Single-Spin Asymmetry for Forward Neutron Production in Polarized p+A Collisions at sNN =200 GeV}},
url = {{http://dx.doi.org/10.1103/PhysRevLett.120.022001}},
doi = {{10.1103/PhysRevLett.120.022001}},
volume = {{120}},
year = {{2018}},
}