Hadronic Production of the Doubly Charmed Baryon ${\Xi }_{cc}$ with Intrinsic Charm

Abstract

The effects of the intrinsic charm on the hadronic production of ${\Xi }_{cc}$ are studied. By taking reasonable intrinsic charm component into account, the change of the theoretical prediction on the production of ${\Xi }_{cc}$ for LHC and Tevatron is small, but in contrast it may enhance significantly for SELEX. The reason is that the collision energy at LHC and Tevatron is so large that the gluon-gluon fusion sub-process, which is irrelevant to intrinsic charm, becomes dominant. But the situation for SELEX is quite different. Our numerical results for SELEX show that by considering all the contributions from various sub-processes, the predicted cross-section may be enhanced by a factor so big as $10^2$ due to a modulating intrinsic charm being taken into account. Therefore, the hadronic production of ${\Xi }_{cc}$ at SELEX may be sensitive enough in observing the intrinsic charm inside the incident hadrons.

18 pages, 8 figures. More discussions are added

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