Cross section and double helicity asymmetry for η mesons and their comparison to π0 production in p + p collisions at √s = 200 GeV
Physical Review D Volume 83 Issue 3
Page 032001-1-032001-11
published_at 2011-02-01
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| File | |
| Title ( eng ) |
Cross section and double helicity asymmetry for η mesons and their comparison to π0 production in p + p collisions at √s = 200 GeV
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| Creator |
PHENIX Collaboration
Hachiya T.
Harada H.
Haruna K.
Kijima K. M.
Nakamiya Y.
Nakamura T.
Ouchida M.
Sakata H.
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| Source Title |
Physical Review D
|
| Volume | 83 |
| Issue | 3 |
| Start Page | 032001-1 |
| End Page | 032001-11 |
| Abstract |
Measurements of double-helicity asymmetries in inclusive hadron production in polarized p + p collisions are sensitive to helicity-dependent parton distribution functions, in particular, to the gluon helicity distribution, Δg. This study focuses on the extraction of the double-helicity asymmetry in η production (p^^→ + p^^→ → η + X), the η cross section, and the η/π0 cross section ratio. The cross section and ratio measurements provide essential input for the extraction of fragmentation functions that are needed to access the helicity-dependent parton distribution functions.
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| NDC |
Physics [ 420 ]
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| Language |
eng
|
| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2011-02-01 |
| Rights |
Copyright (c) 2011 American Physical Society
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0556-2821
[ISSN] 2470-0010
[NCID] AA00773624
[DOI] 10.1103/PhysRevD.83.032001
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