The predictions of the charm structure function exponents behaviour at low x in deep inelastic scattering

被引：15
|
作者：
Boroun, G. R. [1 ]
Rezaei, B. [1 ]
机构：
[1] Razi Univ, Dept Phys, Kermanshah 67149, Iran
来源：
EPL | 2012年 / 100卷 / 04期
关键词：
HEAVY-QUARK CONTRIBUTIONS; D-ASTERISK(+/-) PRODUCTION; PROTONS;
D O I：
10.1209/0295-5075/100/41001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We use the hard (Lipatov) pomeron for the low-x gluon distribution and provide a compact formula for the ratio R-c = F-L(c (c) over bar)/F-2(c (c) over bar) that is useful to extract the charm structure function from the reduced charm cross-section, in particular at DESY HERA. Our results show that this ratio is independent of x and independent of the DGLAP evolution of the gluon PDF. As a result, we show that the charm structure function and the reduced charm cross-section exponents do not have the same behaviour at very low x. This difference is independent of the input gluon distribution functions and predicts the non-linear effects and some evidence for shadowing and antishadowing at HERA and RHIC. Copyright (C) EPLA, 2012
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页数：6
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