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首页> 外文期刊>Physical review, C >Effect of energy conservation on the in-medium NN - N Delta cross section in isospin-asymmetric nuclear matter
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Effect of energy conservation on the in-medium NN - N Delta cross section in isospin-asymmetric nuclear matter

机译：节能对介中NN - ＆GT的影响; NΔ不对称核事件中的截二截面

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摘要

In this paper, the in-medium NN - N Delta cross section is calculated in the framework of the one-boson exchange model by including the isovector mesons, i.e., delta and rho mesons. Due to the isospin exchange in the NN - N Delta process, the vector self-energies of the outgoing particles are modified relative to the incoming particles in isospin asymmetric nuclear matter, and it leads to the effective energies of the ingoing NN pair being different from the outgoing N Delta pair. This effect is investigated in the calculation of the in-medium NN - N Delta cross section. With the corrected energy conservation, the cross sections of the Delta(++) and Delta(+) channels are suppressed, and the cross sections of the Delta(0) and Delta(-) channels are enhanced relative to the results obtained without properly considering the potential-energy changes. Our results further confirm the dependence of medium correction factor R = sigma*(NN - N Delta)/sigma (free)(NN - N Delta) on the charge state of NN - N Delta especially around the threshold energy, but the isospin splitting of medium correction factor R becomes weak at high beam energies.
机译：在本文中，中载NN - ＆ nΔ横截面是通过包括Isovector Mesons，即Delta和Rho Mesons的Isovector Mesons的框架计算。由于NN - ＆ nΔ处理，传出颗粒的载体自能相对于异旋孔不对称核物质中的入射颗粒进行修饰，并且它导致Imoing Nn对与输出Nδ对不同的有效能量。在介中NN - ＆GT的计算中研究了这种效果。 n三角洲横截面。利用校正的节能，抑制了Δ（++）和Δ（+）通道的横截面，并且相对于没有正确获得的结果，增强了Δ（0）和Δ（ - ）通道的横截面考虑到潜在的能量变化。我们的结果进一步证实了中等校正因子r = sigma *（nn - ＆ n delta）/ sigma（自由）（nn - ＆ n delta）的依赖性在Nn - ＆gt的电荷状态下; n三角洲尤其围绕阈值能量，但在高光束能量下，中等校正因子R的异位旋转分裂变弱。

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