Q2 and x-Rescaling Meehanisms and the Nuclear Momentum Conservation in the EMC Effect

Li Guanglie; K F. Liu

Chinese Physics C> 1989, Vol. 13> Issue(S3) : 263-272

Q² and x-Rescaling Meehanisms and the Nuclear Momentum Conservation in the EMC Effect

Li Guanglie ¹ ,
K F. Liu ²

1. Center of Theoretical Physics, CCAST(World Laboratory), Beijing;Institute of High Energy Physics, Chinese Academy of Sciences, Beijing;
2. Department of Physics and Astronomy, University of Kentucky, U. S. A.

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Abstract：
Based upon the consideration of the Fermi motion correction and the nuclear binding effect, the EMC effect can be explained by introducing the Q²- and x-rescaling mechanisms. The experimental data, especially in the region 0.2 < x < 0.5, can be better reproduced by using the x-rescaling mechanism than using the Q²-rescaling mechanism. The problem of the nuclear momentum conservation in the EMC effect is further discussed. In order to make up the 4% nuclear momentum loss, the different Q²- or x-rescaling parameters for the momentum distributions of the valence and sea quarks in the nucleon structure function are chosen. The result shows that, by employing the extended x-rescaling mechanism, a better agreement between the theoretical result and the experimental data in the small x region can be obtained.

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Li Guanglie and K F. Liu. Q² and x-Rescaling Meehanisms and the Nuclear Momentum Conservation in the EMC Effect[J]. Chinese Physics C, 1989, 13(S3): 263-272.

Li Guanglie and K F. Liu. Q² and x-Rescaling Meehanisms and the Nuclear Momentum Conservation in the EMC Effect[J]. Chinese Physics C, 1989, 13(S3): 263-272. shu

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Received: 1988-06-16

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Supported by the National Natural Science Foundation of China.

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Q² and x-Rescaling Meehanisms and the Nuclear Momentum Conservation in the EMC Effect

Li Guanglie ^1,
K F. Liu ^2,

1. Center of Theoretical Physics, CCAST(World Laboratory), Beijing;Institute of High Energy Physics, Chinese Academy of Sciences, Beijing;
2. Department of Physics and Astronomy, University of Kentucky, U. S. A.

Received Date: 1988-06-16

Fund Project: Supported by the National Natural Science Foundation of China.

Abstract: Based upon the consideration of the Fermi motion correction and the nuclear binding effect, the EMC effect can be explained by introducing the Q²- and x-rescaling mechanisms. The experimental data, especially in the region 0.2 < x < 0.5, can be better reproduced by using the x-rescaling mechanism than using the Q²-rescaling mechanism. The problem of the nuclear momentum conservation in the EMC effect is further discussed. In order to make up the 4% nuclear momentum loss, the different Q²- or x-rescaling parameters for the momentum distributions of the valence and sea quarks in the nucleon structure function are chosen. The result shows that, by employing the extended x-rescaling mechanism, a better agreement between the theoretical result and the experimental data in the small x region can be obtained.