Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at s=200 GeV (CROSBI ID 151514)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Abelev, B.I. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; et al. (the STAR Collaboration)
engleski
Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at s=200 GeV
We report precision measurements of the Feynman-x dependence, and first measurements of the transverse momentum dependence, of transverse single spin asymmetries for the production of \pi^0 mesons from polarized proton collisions at \sqrt{; ; s}; ; =200 GeV. The x_F dependence of the results is in fair agreement with perturbative QCD model calculations that identify orbital motion of quarks and gluons within the proton as the origin of the spin effects. Results for the p_T dependence at fixed x_F are not consistent with pQCD-based calculations.
single spin asymmetries
Art. no. 222001.
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Podaci o izdanju
101 (22)
2008.
222001-1-222001-6
objavljeno
0031-9007
10.1103/PhysRevLett.101.222001