An Evidence of the Shadowing Effects to the Perturbative QCD Evolution Process

RUAN JianHong; ZHU Wei; LI GuangLie

Chinese Physics C> 2000, Vol. 24> Issue(11) : 991-997

An Evidence of the Shadowing Effects to the Perturbative QCD Evolution Process

Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039, China2 Department of Physics, East China Normal University, Shanghai 200062, China3 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China

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Abstract：
The longitudinal structure function F_L and the ratio R_L of the longitudinally to the transversely polarized virtual photon absorption cross section are mainly dependent on the gluon distribution in the small-x region. And the initial gluon distribution at Q²= Q²₀ determines whether we must consider the shadowing corrections to the evolution process. In this paper we use the new evolution equation to analysis F_L and R_L, and found there must be Shadowing effects in the parton evolution process.

References

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RUAN JianHong, ZHU Wei and LI GuangLie. An Evidence of the Shadowing Effects to the Perturbative QCD Evolution Process[J]. Chinese Physics C, 2000, 24(11): 991-997.

RUAN JianHong, ZHU Wei and LI GuangLie. An Evidence of the Shadowing Effects to the Perturbative QCD Evolution Process[J]. Chinese Physics C, 2000, 24(11): 991-997. shu

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Received: 1999-10-08
Revised: 1900-01-01

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