Atomic mass dependence of hadron production in semi-inclusive deep inelastic lepton-nucleus scattering

Hadron production in lepton-nucleus deep inelastic scattering is studied in a quark energy loss model. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES pions production data with the quark hadronization occurring outside the nucleus by...

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Bibliographic Details
Published in:Chinese physics C 2013-08, Vol.37 (8), p.29-33
Main Author: 宋丽华 刘娜 段春贵
Format: Article
Language:English
Subjects:
Atomic properties
Attenuation
Hadrons
Inelastic scattering
Nuclei
Pions
Power law
Quarks
原子核
原子质量
强子
损失模型
深度非弹性散射
深部
生产数据
能量损失
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Summary:Hadron production in lepton-nucleus deep inelastic scattering is studied in a quark energy loss model. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES pions production data with the quark hadronization occurring outside the nucleus by means of the hadron formation time. It is found that the obtained energy loss per unit length is 0.440±0.013 GeV/fm for an outgoing quark by the global fit. It is confirmed that the atomic mass number dependence of hadron attenuation is theoretically and experimentally in good agreement with the A2/3 power law for quark hadronization occurring outside the nucleus,
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/37/8/084102