arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0811.3414hep-th
收藏

E7在N=8超引力振幅中的足迹

The footprint of E7 in amplitudes of N=8 supergravity

Renata Kallosh, Taichiro Kugo

摘要:

研究了N=8壳层超引力非线性实现的连续E7对称性的低能定理。对于Nambu-Goldstone玻色子,我们通过计算单粒子外线上的E7电流矩阵元来计算单软标量玻色子发射振幅。我们利用守恒的E7 Noether流的显式形式,证明了在假设S矩阵具有SU(8)对称性的情况下,所有的矩阵元在软动量极限下为零,这意味着所有的树振幅在单软玻色子极限下为零。我们还讨论了高阶振幅的不破E7对称性的影响。

英文摘要:

We study the low energy theorems associated with the non-linearly realized continuous E7 symmetry of the on-shell N=8 supergravity. For Nambu-Goldstone bosons we evaluate the one-soft-scalar-bosonemission amplitudes by computing the E7 current matrix element on the one-particle external lines. We use the explicit form of the conserved E7 Noether current and prove that all such matrix elements vanish in the soft momentum limit,assuming the SU(8) symmetry of the S-matrix.This implies that all tree amplitudes vanish in the one-soft-boson limit. We also discuss the implications of unbroken E7 symmetry for higher-order amplitudes.

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。

↑