Naslov
Forward neutral pion production in p+p and d+Au collisions at s(NN)**(1/2) = 200-GeV

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

Izvornik
Physical Review Letters (0031-9007) 97 (2006), 15; 1-6

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

Ključne riječi
p p; colliding beams; scattering; heavy ion; pi0; hadroproduction; production; small-angle; differential cross section; energy dependence;

Sažetak
Measurements of the production of forward pi0 mesons from p+p and d+Au collisions at sqrt(s_NN)=200 GeV are reported. The p+p yield generally agrees with next-to-leading order perturbative QCD calculations. The d+Au yield per binary collision is suppressed as eta increases, decreasing to ~30% of the p+p yield at <eta>=4.00, well below shadowing expectations. Exploratory measurements of azimuthal correlations of the forward pi0 with charged hadrons at eta~0 show a recoil peak in p+p that is suppressed in d+Au at low pion energy. These observations are qualitatively consistent with a saturation picture of the low-x gluon structure of heavy nuclei.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
Stranice navedene u časopisu: 2302.

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