arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1609.03804nucl-thhep-ph
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三体系统的光锋自旋相关谱函数和核子动量分布

Light-Front spin-dependent Spectral Function and Nucleon Momentum Distributions for a Three-Body System

Alessio Del Dotto, Emanuele Pace, Giovanni Salmè, Sergio Scopetta

摘要:

从系统的光阵面波函数出发,提出了三费米子束缚系统的自旋相关谱函数和光阵面哈密顿动力学中动量分布的Poincare协变定义.所采用的方法是基于Bakamjian-Thomas构造的庞加莱发电机,这使得人们可以很容易地将熟悉的和广泛的核相互作用的知识导入到一个光阵面框架。所提出的形式主义可以找到有用的应用在精细的核计算,如需要评估的EMC效应或半包容的深度非弹性截面与极化核目标,因为显着的光前非极化动量分布的定义满足规范化和动量和规则。它还示出了一个简单的概括的定义的光阵面谱函数的A-核子系统。

英文摘要:

Poincare' covariant definitions for the spin-dependent spectral function and for the momentum distributions within the light-front Hamiltonian dynamics are proposed for a three-fermion bound system, starting from the light-front wave function of the system. The adopted approach is based on the Bakamjian-Thomas construction of the Poincare' generators, that allows one to easily import the familiar and wide knowledge on the nuclear interaction into a light-front framework. The proposed formalism can find useful applications in refined nuclear calculations, like the ones needed for evaluating the EMC effect or the semi-inclusive deep inelastic cross sections with polarized nuclear targets, since remarkably the light-front unpolarized momentum distribution by definition fulfills both normalization and momentum sum rules. It is also shown a straightforward generalization of the definition of the light-front spectral function to an A-nucleon system.

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