arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0709.0500hep-ph
收藏

硬壁AdS/QCD模型手征极限中的π介子形状因子

Pion Form Factor in Chiral Limit of Hard-Wall AdS/QCD Model

H. R. Grigoryan, A. V. Radyushkin

摘要:

本文利用具有硬壁截断的全息QCD对偶模型,发展了一种计算手征极限下π介子形状因子和电荷密度分布的方法。我们引入了两个共轭π介子波函数,并给出了这些函数和π介子形状因子的解析表达式。它们允许相关的π衰变常数和π电荷的电半径的手性凝聚体和硬壁截止尺度的值等可观的。的π形状因子的演变大值的动量转移进行了讨论,并将结果与现有的实验数据进行了比较。

英文摘要:

We develop a formalism to calculate form factor and charge density distribution of pion in the chiral limit using the holographic dual model of QCD with hard-wall cutoff. We introduce two conjugate pion wave functions and present analytic expressions for these functions and for the pion form factor. They allow to relate such observables as the pion decay constant and the pion charge electric radius to the values of chiral condensate and hard-wall cutoff scale. The evolution of the pion form factor to large values of the momentum transfer is discussed, and results are compared to existing experimental data.

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。

↑