Nucleon-gold collisions at 200A GeV using tagged d + Au interactions in the PHOBOS detector
Name
PhysRevC.92.034915.pdf
Size
827.75 KB
Format
Adobe PDF
Checksum (MD5)
6226d21f3c40bbbd58106ee0e1c72726
Author(s)
Back, B. B.
Baker, M. D.
Barton, D. S.
Becker, B.
Betts, R. R.
Bickley, A. A.
Bindel, R.
Carroll, A.
García, E.
Gburek, T.
Date Issued
September 2015
Journal
Physical Review C
Publisher
American Physical Society
Citation
Back, B. B., et al. "Nucleon-gold collisions at 200A GeV using tagged d + Au interactions in the PHOBOS detector." Phys. Rev. C 92, 034915 (September 2015). © 2015 American Physical Society
Version
Final published version
Abstract
Forward calorimetry in the PHOBOS detector has been used to study charged hadron production in d + Au, p + Au, and n + Au collisions at √s[subscript NN] = 200 GeV. The forward proton calorimeter detectors are described and a procedure for determining collision centrality with these detectors is detailed. The deposition of energy by deuteron spectator nucleons in the forward calorimeters is used to identify p + Au and n + Au collisions in the data. A weighted combination of the yield of p + Au and n + Au is constructed to build a reference for Au + Au collisions that better matches the isospin composition of the gold nucleus. The p[subscript T] and centrality dependence of the yield of this improved reference system is found to match that of d + Au. The shape of the charged-particle transverse momentum distribution is observed to extrapolate smoothly from p + [bar over p] to central d + Au as a function of the charged-particle pseudorapidity density. The asymmetry of positively and negatively charged hadron production in p + Au is compared to that of n + Au. No significant asymmetry is observed at midrapidity. These studies augment recent results from experiments at the CERN Large Hadron Collider and BNL Relativistic Heavy Ion Collider facilities to give a more complete description of particle production in p + A and d + A collisions, essential for the understanding the medium produced in high-energy nucleus-nucleus collisions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevC.92.034915
