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arXiv 1202.2011hep-ph
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重-轻QCD夸克模型中Isgur函数及其导数的分析

An analysis of the Isgur-Wise Function and its derivatives within a Heavy-Light QCD Quark Model

Sabyasachi Roy, Dilip Kumar Choudhury

摘要:

在由QCD激发势模型确定介子波函数时,如果以线性禁闭项为母体(以库仑项为微扰),则所得的波函数中出现Airy函数,这是一个无穷级数。在研究Isgur-Wise函数(IWF)及其导数时,由于积分的无限大上限而引起发散。本文提出了这类积分的上限的一些合理的截断值,并研究了截断值对结果的影响。我们还研究了无限Airy级数的多项式逼近阶在计算IWF导数时的敏感性。

英文摘要:

In determining the mesonic wave function from QCD inspired potential model, if the linear confinement term is taken as parent (with columbic term as perturbation), Airy's function appears in the resultant wave function - which is an infinite series. In the study of Isgur-Wise function (IWF) and its derivatives with such a wave function, the infinite upper limit of integration gives rise to divergence. In this paper, we have proposed some reasonable cut-off values for the upper limit of such integrations and studied the subsequent effect on the results. We also study the sensitivity of the order of polynomial approximation of the infinite Airy series in calculating the derivatives of IWF.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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