Naslov
Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at s=200 GeV

Autori
Abelev, B.I. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; et al. (the STAR Collaboration)

Izvornik
Physical Review Letters (0031-9007) 101 (2008), 22; 222001-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
single spin asymmetries

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
Art. no. 222001.

POVEZANOST RADA