Hadron formation in semi-inclusive deep inelastic lepton-nucleus scattering

Hadron formation in semi-inclusive deep inelastic lepton-nucleus scattering

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摘要 Hadron production in lepton-nucleus deep inelastic scattering is studied in a model including quark energy loss and nuclear absorption. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES experimental data with the quark hadronization occurring inside the nucleus by means of the hadron formation time. It is shown that with increase of the energy fraction carried by the hadron, the nuclear suppression on hadron multiplicity ratio from nuclear absorption gets bigger. It is found that when hadronization occurs inside the nucleus, the nuclear absorption is the dominant mechanism causing a reduction of the hadron yield. The atomic mass dependence of hadron attenuation for quark hadronization starting inside the nucleus is confirmed theoretically and experimentally to be proportional to A1/3. Hadron production in lepton-nucleus deep inelastic scattering is studied in a model including quark energy loss and nuclear absorption. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES experimental data with the quark hadronization occurring inside the nucleus by means of the hadron formation time. It is shown that with increase of the energy fraction carried by the hadron, the nuclear suppression on hadron multiplicity ratio from nuclear absorption gets bigger. It is found that when hadronization occurs inside the nucleus, the nuclear absorption is the dominant mechanism causing a reduction of the hadron yield. The atomic mass dependence of hadron attenuation for quark hadronization starting inside the nucleus is confirmed theoretically and experimentally to be proportional to A1/3.

作者宋丽华刘娜段春贵

机构地区 Department of Physics College of Science College of Mathematics and Physics Hebei Advanced Thin Films Laboratory

出处《Chinese Physics C》 SCIE CAS CSCD 2013年第10期26-32,共7页 中国物理C（英文版）

基金 National Natural Science Foundation of China (11075044) Natural Science Foundation of Hebei Province (A2008000137)

关键词 deep inelastic scattering NUCLEI nuclear absorption hadron production deep inelastic scattering, nuclei, nuclear absorption, hadron production

分类号 O572.3 [理学—粒子物理与原子核物理] O572.2 [理学—粒子物理与原子核物理]

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2013年第10期

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Hadron formation in semi-inclusive deep inelastic lepton-nucleus scattering

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