Off-shell CHY amplitudes

被引：9

作者：

Lam, C. S. ^{[1
,2
]}

Yao, York-Peng ^{[3
]}

机构：

[1] McGill Univ, Dept Phys, 3600 Univ St, Montreal, PQ H3A 2T8, Canada

[2] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[3] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

来源：

NUCLEAR PHYSICS B | 2016年 / 907卷

关键词：

D O I：

10.1016/j.nuclphysb.2016.04.023

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The Cachazo-He-Yuan (CHY) formula for on-shell scattering amplitudes is extended off-shell. The off shell amplitudes (amputated Green's functions) are Mobius invariant, and have the same momentum poles as the on-shell amplitudes. The working principles which drive the modifications to the scattering equations are mainly Mobius covariance and energy momentum conservation in off-shell kinematics. The same technique is also used to obtain off-shell massive scalars. A simple off-shell extension of the CHY gauge formula which is Mobius invariant is proposed, but its true nature awaits further study. (C) 2016 The Authors. Published by Elsevier B.V.

引用

页码：678 / 694

页数：17

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