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arXiv 0807.0216nucl-th
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轻核中的电-弱相互作用

Electro-Weak Interactions in Light Nuclei

Doron Gazit

摘要:

本论文在少体核物理领域内,研究了弱电探针与轻核的低能非弹性反应。近年来,这种相互作用在实验和理论上都受到关注,因为它们在物理学的各个领域都发挥着作用,从检查标准模型极限,到原子核结构和动力学研究,再到天体物理现象中的微观相互作用,如超新星爆炸和元素的核合成。在这项工作中考虑的反应是:(i)中微子与A=3和$^4$ He核的相互作用,在典型的核心坍缩超新星的能量。对于$^4$ He,计算了中性和带电电流反应,而对于A=3的核,仅计算了中性电流反应。(ii)$^4$ He.这个长期存在的问题在过去的三十年里一直是理论和实验努力的吸引力。计算使用了两种新的方法。洛仑兹积分变换(LIT)方法,将散射问题转化为类束缚态问题。使用超球谐函数中的有效相互作用(EIHH)方法求解所得方程。

英文摘要:

In this thesis, conducted in the field of few--body nuclear physics,I studied low energy inelastic reactions of electro--weak probes on light nuclei. Such interactions hold experimental and theoretical attention in recent years because of the role they play in various fields of physics, stretching from checking the standard model limits; through nuclear structure and dynamics research; up to microscopic interaction in astrophysical phenomena, such as supernova explosion and the nucleosynthesis of the elements. The reactions considered in this work are: (i) Neutrino interaction with A=3 and $^4$He nuclei, in energies typical to core-collapse supernova. For $^4$He both the neutral and charged current reactions were calculated, whereas only neutral current reactions are calculated for A=3 nuclei. (ii) Photoabsorption on $^4$He. This long standing problem has been the attraction of theoretical and experimental efforts in the last three decades. The calculations make use of two novel methods. the Lorentz Integral Transform (LIT) method, which is used to transform the scattering problem to a bound state like problem. The resulting equations are solved using the Effective Interaction in the Hyperspherical Harmonics (EIHH) method.

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