Probing polarized gluon distributions through charmed hadron production in polarized pp collisions at BNL-RHIC energy

摘要

In order to extract information about behavior of polarized gluons in the nucleon, charmed hadron productions, i.e. D*(+) meson and Lambda(+)(c) baryon productions, are studied in polarized pp reactions at BNL-RHIC energy. For these processes, the spin correlation asymmetry D-LL between the target proton and the produced charmed hadron, and its statistical sensitivity delta D-LL are calculated. From analyses on these processes, we found that the pseudorapidity distribution of D-LL in the limited transverse momentum region is quite effective for distinguishing the model of polarized gluons as well as the model of spin-dependent fragmentation functions.