arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.4405hep-thhep-ph
收藏

弱耦合和强耦合下的正则威尔逊圈和MHV振幅

Regular Wilson loops and MHV amplitudes at weak and strong coupling

Paul Heslop, Valentin V. Khoze

摘要:

传统上,N=4 SYM中威尔逊圈和超过一个环的振幅之间的对偶性由余数函数表征。由于BDS表达式的微扰起源,余项函数在弱耦合时比在强耦合时更自然。我们提倡一种更直接的方法,基于考虑威尔逊圈的比率。这允许我们定义一个明显有限的,正则化独立的,共形不变的量。它不直接引用BDS表达式,并且定义是独立于正则化的。它在弱耦合和强耦合时都是一个自然的对象,在强耦合时,它与辅助可积系统的自由能直接相关。然后,我们计算这些比率的连续家庭的正多边形为6,8和10点在一个和两个循环。这些结果进行了比较,最近在强耦合的表达式。

英文摘要:

Traditionally, the duality between Wilson loops and amplitudes beyond one loop in N=4 SYM is characterised by the remainder function. Because of the perturbative origins of the BDS expression, the remainder function is more natural at weak than at strong coupling. We advocate instead a more direct approach, based on considering ratios of Wilson loops. This allows us to define a manifestly finite, regularisation independent, conformally invariant quantity. It does not make a direct reference to the BDS expression and the definition is regularisation independent. It is a natural object at weak and at strong coupling, and in the latter case is directly related to the free energy of an auxiliary integrable system. We then compute these ratios for continuous families of regular polygons for 6,8 and 10 points at one and two-loops. These results are compared to expressions derived recently at strong coupling.

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。

↑