Atomic mass dependence of hadron production in deep inelastic scattering on nuclei

被引：36

作者：

Accardi, A

Grünewald, D

Muccifora, V

Pirner, HJ

机构：

[1] Univ Heidelberg, Inst Theoret Phys, D-69120 Heidelberg, Germany

[2] Iowa State Univ Sci & Technol, Dept Phys & Astrophys, Ames, IA 50011 USA

[3] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[4] Columbia Univ, Dept Phys, New York, NY 10027 USA

来源：

NUCLEAR PHYSICS A | 2005年 / 761卷 / 1-2期

关键词：

semi-inclusive deep inelastic scattering; fragmentation; particle production in nuclei;

D O I：

10.1016/j.nuclphysa.2005.05.201

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Hadron production in lepton-nucleus deep inelastic scattering is studied in an absorption model. In the proposed model, the early stage of hadronization in the nuclear medium is dominated by prehadron formation and absorption, controlled by flavor-dependent formation lengths and absorption cross sections. Computations for hadron multiplicity ratios are presented and compared with the HERMES experimental data for pions, kaons, protons and antiprotons. The mass-number dependence of hadron attenuation is shown to be sensitive to the underlying hadronization dynamics. Contrary to common expectations for absorption models, a leading term proportional to A(2/3) is found. Deviations from the leading behavior arise at large mass-numbers and large hadron fractional momenta. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：67 / 91

页数：25

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