Naslov
Cross Sections and Transverse Single-Spin Asymmetries in Forward Neutral Pion Production from Proton Collisions at sqrt(s) = 200 GeV

Autori
Adams, J. ; Planinić, Mirko et al.

Izvornik
Physical review letters (0031-9007) 92 (2004), 171801; 171801-05

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

Ključne riječi
differential cross section; energy dependence; spin; asymmetry

Sažetak
Measurements of the production of forward high-energy pi0 mesons from transversely polarized proton collisions at \sqrt{; ; s}; ; =200 GeV are reported. The cross section is generally consistent with next-to-leading order perturbative QCD calculations. The analyzing power is small at x_F below about 0.3, and becomes positive and large at higher x_F, similar to the trend in data at \sqrt{; ; s}; ; <=20 GeV. The analyzing power is in qualitative agreement with perturbative QCD model expectations. This is the first significant spin result seen for particles produced with p_T>1 GeV/c at a polarized proton collider.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA