Gottfried sum rule from maximum entropy method quark distributions with DGLAP evolution and with DGLAP evolution with GLR-MQ-ZRS corrections

Chengdong Han; Qiang Fu; Xurong Chen

doi:10.1088/1674-1137/42/10/103103

Chinese Physics C> 2018, Vol. 42> Issue(10) : 103103 DOI: 10.1088/1674-1137/42/10/103103

Gottfried sum rule from maximum entropy method quark distributions with DGLAP evolution and with DGLAP evolution with GLR-MQ-ZRS corrections

Chengdong Han ^1,2 ,
Qiang Fu ^1,2,3 ,
Xurong Chen ¹

1.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Lanzhou University, Lanzhou 730000, China
4.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

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Abstract：
A new method to test the valence quark distribution of nucleons obtained from the maximum entropy method using the Gottfried sum rule by performing the DGLAP equations with GLR-MQ-ZRS corrections and the original leading-order/next-to-leading-order (LO/NLO) DGLAP equations is outlined. The test relies on knowledge of the unpolarized electron-proton structure function F₂^ep and the electron-neutron structure function F₂^en and the assumption that Bjorken scaling is satisfied. In this work, the original Gottfried summation value obtained by the integrals of the structure function at different Q² is in accordance with the theoretical value of 1/3 under the premise of light-quark flavor symmetry of the nucleon sea, whether it results from dynamical evolution equations or from global quantum chromodynamics fits of PDFs. Finally, we present the summation value of the LO/NLO DGLAP global fits of PDFs under the premise of light-quark flavor asymmetry of the nucleon sea. According to analysis of the original Gottfried summation value with two evolution equations at different Q², we find that the valence quark distributions of nucleons obtained by using the maximum entropy method are effective and reliable.
- Gottfired sum rule ,
- DGLAP-GLR-MQ-ZRS equations ,
- DGLAP equations ,
- deviation

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Chengdong Han, Qiang Fu and Xurong Chen. Gottfried sum rule from maximum entropy method quark distributions with DGLAP evolution and with DGLAP evolution with GLR-MQ-ZRS corrections[J]. Chinese Physics C, 2018, 42(10): 103103. doi: 10.1088/1674-1137/42/10/103103

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Received: 2018-04-22
Revised: 2018-07-02

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Supported by National Basic Research Program of China (973 Program) (2014CB845406).

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Gottfried sum rule from maximum entropy method quark distributions with DGLAP evolution and with DGLAP evolution with GLR-MQ-ZRS corrections

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Gottfried sum rule from maximum entropy method quark distributions with DGLAP evolution and with DGLAP evolution with GLR-MQ-ZRS corrections

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