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arXiv 1104.0093nucl-thhep-ph
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核介质中核子结构函数的有限压力修正

Finite Pressure Corrections to Nucleon Structure Function Inside a Nuclear Medium

J. Rożynek

摘要:

我们在相对论平均场(RMF)框架下进行的模型计算表明,在饱和点以上,核物质(NM)中核子结构函数(SF)的改变是多么重要。它们起源于部分子纵向动量守恒--这对于解释NM饱和点处的EMC效应至关重要。对于更高的密度,有限压力修正来自于对NM有效的Hugenholtz-van Hove(HH)定理,并要求修改核子SF。密度越高,核SF的密度演化越强。在这里,我们表明,在我们的修改Walecka模型的状态方程(EoS)的过程是非常接近,从广泛的DBHF计算波恩A潜力。核的可压缩性降低。我们的模型-核RMF的非线性扩展,没有额外的参数。

英文摘要:

Our model calculations performed in the frame of the Relativistic Mean Field (RMF) approach show how important are the modifications of nucleon Structure Function (SF) in Nuclear Matter (NM) above the saturation point. They originated from the conservation of a parton longitudinal momenta - essential in the explanation of the EMC effect at the saturation point of NM. For higher density the finite pressure corrections emerge from the Hugenholtz -van Hove (HH) theorem valid for NM and asks to modify the nucleon SF. The density evolution of the nuclear SF seems to be stronger for higher densities. Here we show that the course of Equation o State (EoS) in our modified Walecka model is very close to that obtained from extensive DBHF calculations with a Bonn A potential. The nuclear compressibility decreases. Our model - a nonlinear extension of nuclear RMF, has no additional parameters.

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