Naslov
Long range rapidity correlations and jet production in high energy nuclear collisions

Autori
Abelev, B.I. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ...

Izvornik
Physical review. C. Nuclear physics (0556-2813) 80 (2009), 6; 064912-1

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

Ključne riječi
di-hadron; correlations

Sažetak
The STAR Collaboration at RHIC presents a systematic study of high transverse momentum charged di-hadron correlations at small azimuthal pair separation \dphino, in d+Au and central Au+Au collisions at $\rts = 200$ GeV. Significant correlated yield for pairs with large longitudinal separation \deta is observed in central Au+Au, in contrast to d+Au collisions. The associated yield distribution in \detano$\times$\dphi can be decomposed into a narrow jet-like peak at small angular separation which has a similar shape to that found in d+Au collisions, and a component which is narrow in \dphi and \textcolor{; ; ; ; black}; ; ; ; {; ; ; ; depends only weakly on}; ; ; ; $\deta$, the "ridge". Using two systematically independent analyses, \textcolor{; ; ; ; black}; ; ; ; {; ; ; ; finite ridge yield}; ; ; ; is found to persist for trigger $\pt > 6$ \GeVc, indicating that it is correlated with jet production. The transverse momentum spectrum of hadrons comprising the ridge is found to be similar to that of bulk particle production in the measured range ($2 < \pt < 4 \GeVc$).

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA