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Title: Cross section and transverse single-spin asymmetry of eta mesons in p plus p collisions at √s=200 GeV at forward rapidity

Journal Article · · Physical Review. D, Particles, Fields, Gravitation and Cosmology
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We present a measurement of the cross section and transverse single-spin asymmetry (AN) for ηmesons at large pseudorapidity from √s=200 GeV p+p collisions. The measured cross section for 0.5< pT <5.0 GeV/c and 3.0<|η|<3.8 is well described by a next-to-leading-order perturbative-quantum-chromodynamics calculation. The asymmetries AN have been measured as a function of Feynman-x (xF) from 0.2<|xF|<0.7, as well as transverse momentum (pT) from 1.0< pT<4.5 GeV/c. The asymmetry averaged over positive xF is = 0.061±0.014. The results are consistent with prior transverse single-spin measurements of forward η and π0 mesons at various energies in overlapping xF ranges. Comparison of different particle species can help to determine the origin of the large observed asymmetries in p+p collisions.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Contributing Organization:
PHENIX Collaboration
Grant/Contract Number:
AC02-98CH10886
OSTI ID:
1163338
Alternate ID(s):
OSTI ID: 1180556
Report Number(s):
BNL-106303-2014-JA; PRVDAQ; KB0201021
Journal Information:
Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 90, Issue 7; ISSN 1550-7998
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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