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arXiv 2603.04485hep-thhep-ph
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弦振幅的高自旋和高点约束

Higher-Spin and Higher-Point Constraints on Stringy Amplitudes

Max-Planck-Institut für Physik (Werner-Heisenberg-Institut)(马克斯·普朗克物理研究所(维尔纳·海森堡研究所));Center for Cosmology and Particle Physics, Department of Physics, New York University(纽约大学物理系宇宙学与粒子物理中心)

Ivano Basile, Grant N. Remmen, Georgina Staudt

AI总结:

利用多粒子因子化方法,通过七点因子化唯一固定Koba-Nielsen型振幅的Regge截距,并导出超弦形变的高自旋多重正性界限,证明Gross振幅族的四点形变被幺正性禁止。

摘要:

我们利用多粒子因子化来约束树级开弦振幅的形变。假设直到第二激发能级的相同自旋中间态具有最小简并性,我们发现通过七点因子化可以唯一固定所有Koba-Nielsen型振幅的Regge截距,精确匹配玻色弦。此外,我们产生了对世界sheet被积函数形变的新约束。然后,我们转向具有无质量外部态和任意谱简并性的超弦形变,使用软运动学。考虑高自旋共振的无限塔,我们在大能级极限下导出领先和次领先阶的多重正性界限。我们将这些界限应用于Gross发现的振幅族中最简单的可因子化卫星形变,表明任何此类四点弦振幅的形变都被幺正性禁止。我们的结果强化了弦激发的高自旋塔比任何有限数量的物种都更加刚性的普遍观点。

英文摘要:

We employ multiparticle factorization to constrain deformations of tree-level open string amplitudes. Assuming minimal degeneracy among intermediate states of the same spin up through the second excited level, we find that the Regge intercept among all amplitudes of the Koba-Nielsen type can be uniquely fixed using seven-point factorization, precisely matching the bosonic string. Moreover, we produce novel constraints on deformations of the worldsheet integrand. We then turn to deformations of superstrings, with massless external states and arbitrary spectral degeneracy, using soft kinematics. Accounting for the infinite tower of higher-spin resonances, we obtain novel multipositivity bounds to leading and subleading order in the large-level limit. We apply these bounds to the simplest factorizable satellite deformation in the family of amplitudes found by Gross, showing that any deformation of four-point string amplitudes of this type is forbidden by unitarity. Our results reinforce the folklore that the higher-spin tower of string excitations is dramatically more rigid than any finite number of species.

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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