arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.09372hep-thmath.CO
收藏

类幅面体几何

Amplituhedron-like geometries

Gabriele Dian, Paul Heslop

摘要:

我们考虑振幅面体的几何形状,它是以类似的方式定义的振幅面体的内在定义,但与非最大绕组数。我们建议,对于最少的点的情况下,这些几何的标准形对应于产品的奇偶共轭振幅在树以及循环水平。超空间中振幅的乘积提升为玻色化超空间中的星积,并给出了星积的精确定义。我们给出了一个替代的定义的幅面体几何形状,类似于原来的幅面体的定义,也是一个表征作为一个总和对壳图,我们用来证明猜想在树的水平。所有类振幅面像几何的并集有一个非常简单的定义,只由物理不等式给出。虽然这样的并集并不给出正几何,但标准形式的标准定义的自然扩展,即全局定向标准形式,作用于这个并集并给出振幅的平方。

英文摘要:

We consider amplituhedron-like geometries which are defined in a similar way to the intrinsic definition of the amplituhedron but with non-maximal winding number. We propose that for the cases with minimal number of points the canonical form of these geometries corresponds to the product of parity conjugate amplitudes at tree as well as loop level. The product of amplitudes in superspace lifts to a star product in bosonised superspace which we give a precise definition of. We give an alternative definition of amplituhedron-like geometries, analogous to the original amplituhedron definition, and also a characterisation as a sum over pairs of on-shell diagrams that we use to prove the conjecture at tree level. The union of all amplituhedron-like geometries has a very simple definition given by only physical inequalities. Although such a union does not give a positive geometry, a natural extension of the standard definition of canonical form, the globally oriented canonical form, acts on this union and gives the square of the amplitude.

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。

↑