Cross section and double helicity asymmetry for [eta] mesons and their comparison to [pi] super(0) production at PHENIX

The [eta] cross section and double helicity asymmetry (p+p arrow right [eta]+X) as a function of transverse momentum have been measured at [radical]s = 200 GeV at the PHENIX experiment at RHIC. The cross section data serve as important input to the extraction of [eta] fragmentation functions, which...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Conference series 2011-01, Vol.295 (1), p.1-8
Main Author: Ellinghaus, Frank
Format: Article
Language:English
Subjects:
Asymmetry
Cross sections
Cross sections (physics)
Distribution functions
Extraction
Fragmentation
Helicity
Transverse momentum
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The [eta] cross section and double helicity asymmetry (p+p arrow right [eta]+X) as a function of transverse momentum have been measured at [radical]s = 200 GeV at the PHENIX experiment at RHIC. The cross section data serve as important input to the extraction of [eta] fragmentation functions, which were essentially unknown before. With the availability of fragmentation functions the asymmetry data can be included in future pQCD fits in order to further constrain the polarized parton distribution functions, in particular the helicity-dependent gluon distribution function. In addition, the [eta] to [pi] super(0) cross section ratio as a function of transverse momentum has been extracted in a single pass over the same data set, thus minimizing systematic uncertainties. The inclusion of these data in future fragmentation function extractions should allow for more precise results for both particle species.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/295/1/012103