Research on parton distributions in nucleon

XU Shi-Lei; RUAN Jian-Hong

doi:10.3969/j.issn.1000-5641.2015.01.024

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Mar. 2015

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XU Shi-Lei, RUAN Jian-Hong. Research on parton distributions in nucleon[J]. Journal of East China Normal University (Natural Sciences), 2015, (1): 195-202. doi: 10.3969/j.issn.1000-5641.2015.01.024

Citation:

XU Shi-Lei, RUAN Jian-Hong. Research on parton distributions in nucleon[J]. Journal of East China Normal University (Natural Sciences), 2015, (1): 195-202. doi: 10.3969/j.issn.1000-5641.2015.01.024

XU Shi-Lei, RUAN Jian-Hong. Research on parton distributions in nucleon[J]. Journal of East China Normal University (Natural Sciences), 2015, (1): 195-202. doi: 10.3969/j.issn.1000-5641.2015.01.024

Citation:

XU Shi-Lei, RUAN Jian-Hong. Research on parton distributions in nucleon[J]. Journal of East China Normal University (Natural Sciences), 2015, (1): 195-202. doi: 10.3969/j.issn.1000-5641.2015.01.024

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Research on parton distributions in nucleon

doi: 10.3969/j.issn.1000-5641.2015.01.024

XU Shi-Lei,
RUAN Jian-Hong^,

1.
Department of Physics, East China Normal University, Shanghai 200241, China

Received Date: 2014-04-01
Publish Date: 2015-01-25

Abstract

Abstract

We present the parton distributions at leading order (LO) coming from GJR, MSTW and CTEQ parton sets and compare them at different momentum scales. Obvious differences exist in their gluon and sea quark distributions at small x region. Itindicates that people have not known the nucleon parton distributions very well. We analysze the influence of higher twist effects, i.e., the shadowing effects and anti-shadowing effects, on parton distributions. Because of the shadowing effects, the twist-4 gluon and sea quark distributions are smaller than the twist-2 distributions at small and middle x region, while, the anti-shadowing effects make the twist-4 gluon and sea quark distributions larger than the twist-2 distributions at x 2 region. Finally, we present a detailed analysis of how the protons momentum is shared among various parton flavors at different Q2 for different parton sets. With the numerical calculation, we show that the MD-DGLAP equations are momentum conservation.
- parton distributions,
- higher twist effect,
- evolution equation

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References(1)

References

[1]

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