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arXiv 1402.1934hep-th
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用精确谱和相移对(1 + 1)维超对称扭结质量的单圈量子修正

One-loop quantum correction to the mass of the supersymmetric Kink in (1 + 1) dimensions using the exact spectra and the phase shifts

Farid Charmchi, Siamak S. Gousheh, Seyed Morteza Hosseini

摘要:

我们在(1 + 1)维的单圈水平上计算了具有最小超对称性的扭结质量的量子修正。在本文中,我们讨论了这个问题,从卡西米尔能量的角度来看,使用相移以及模式数截止正则化方法。精确的解决方案,特别是一个精确的表达的相移已经可用于玻色子部门。在本文中,我们推导出类似的精确结果的费米子部门。最重要的是,我们推导出一个独特的和精确的表达式的费米子相移,使用精确的解决方案的连续部分的频谱和处方,我们已经介绍了。我们使用列文森定理的强形式和弱形式仅仅是为了检查我们的相移和结果的一致性,而不是作为我们过程的一个组成部分。此外,我们发现,费米子谱的性质,包括束缚态和连续态,是独立的Yukawa耦合常数$λ$的大小,和动力学质量产生发生在树水平。这些都是由超对称性引起的,与没有超对称性的类似模型形成鲜明对比,例如Jackiw-Rebbi模型,其中$λ$是自由参数。我们利用重整化微扰理论,找到了与超对称性相一致的反项。我们表明,这一过程是足够的,以获得可接受的值的单圈量子修正的质量的超对称扭结是$-\frac{m}{2π}$。

英文摘要:

We compute the quantum correction to the mass of the kink at the one-loop level in (1+1) dimensions with minimal supersymmetry. In this paper we discuss this issue from the Casimir energy perspective using phase shifts along with the mode number cut-off regularization method. Exact solutions and in particular an exact expression for the phase shifts are already available for the bosonic sector. In this paper we derive analogous exact results for the fermionic sector. Most importantly, we derive a unique and exact expression for the fermionic phase shift, using the exact solutions for the continuum parts of the spectrum and a prescription we had introduced earlier. We use the strong and weak forms of the Levinson theorem merely for checking the consistency of our phase shifts and results, and not as an integral part of our procedure. Moreover, we find that the properties of the fermionic spectrum, including bound and continuum states, are independent of the magnitude of the Yukawa coupling constant $λ$, and that the dynamical mass generation occurs at the tree level. These are all due to SUSY and are in sharp contrast to analogous models without SUSY, such as the Jackiw-Rebbi model, where $λ$ is a free parameter. We use the renormalized perturbation theory and find the counterterm which is consistent with supersymmetry. We show that this procedure is sufficient to obtain the accepted value for the one-loop quantum correction to the mass of the SUSY kink which is $-\frac{m}{2π}$.

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