arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.08221hep-th
收藏

S-矩阵Bootstrap分析工具

An Analytical Toolkit for the S-matrix Bootstrap

Miguel Correia, Amit Sever, Alexander Zhiboedov

摘要:

我们重新审视分析方法约束非微扰$S$矩阵的酉,相对论,在$d \geq 3$时空维度的差距理论。我们假设二对二散射振幅的扩展解析性,并将其与弹性么正性一起用于振幅的两个自然展开。一个是阈值(非相对论性)膨胀,另一个是大自旋膨胀。这两者之间的关系是由弗洛伊萨特-格里博夫反演公式。当结合交叉和局部约束上的不连续性的振幅,这使我们能够约束散射在有限的能量和自旋在实验中测量的低能量参数。最后,我们讨论了现代数值方法的$S$ -矩阵引导,以及如何可以改善我们的分析结果的基础上。

英文摘要:

We revisit analytical methods for constraining the nonperturbative $S$-matrix of unitary, relativistic, gapped theories in $d \geq 3$ spacetime dimensions. We assume extended analyticity of the two-to-two scattering amplitude and use it together with elastic unitarity to develop two natural expansions of the amplitude. One is the threshold (non-relativistic) expansion and the other is the large spin expansion. The two are related by the Froissart-Gribov inversion formula. When combined with crossing and a local bound on the discontinuity of the amplitude, this allows us to constrain scattering at finite energy and spin in terms of the low-energy parameters measured in the experiment. Finally, we discuss the modern numerical approach to the $S$-matrix bootstrap and how it can be improved based on the results of our analysis.

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。

↑