Off-shell CHY amplitudes and Feynman graphs

被引：2
|
作者：
Dolan, Louise [1 ]
Goddard, Peter [2 ]
机构：
[1] Univ N Carolina, Dept Phys, Chapel Hill, NC 27599 USA
[2] Inst Adv Study, Sch Nat Sci, Olden Lane, Princeton, NJ 08540 USA
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2020年 / 2020卷 / 04期
关键词：
Scattering Amplitudes; Field Theories in Higher Dimensions; Field Theories in Lower Dimensions;
D O I：
10.1007/JHEP04(2020)141
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：
A polynomial form is established for the off-shell CHY scattering equations proposed by Lam and Yao. Re-expressing this in terms of independent Mandelstam invariants provides a new expression for the polynomial scattering equations, immediately valid off shell, which makes it evident that they yield the off-shell amplitudes given by massless ?(3) Feynman graphs. A CHY expression for individual Feynman graphs, valid even off shell, is established through a recurrence relation.
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页数：19
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