Wilson lines, Grassmannians and gauge invariant off-shell amplitudes in N=4 SYM

被引：0
|
作者：
Bork, L. V. [1 ,2 ]
Onishchenko, A. I. [3 ,4 ,5 ]
机构：
[1] Inst Theoret & Expt Phys, Moscow, Russia
[2] All Russia Res Inst Automat, Ctr Fundamental & Appl Res, Moscow, Russia
[3] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna, Russia
[4] State Univ, Moscow Inst Phys & Technol, Dolgoprudnyi, Russia
[5] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow, Russia
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2017年 / 04期
关键词：
Scattering Amplitudes; Extended Supersymmetry; Integrable Field Theories; HIGH-ENERGY FACTORIZATION; SCATTERING-AMPLITUDES;
D O I：
10.1007/JHEP04(2017)019
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：
In this paper we consider tree-level gauge invariant off - shell amplitudes (Wilson line form factors) in N = 4 SYM. For the off - shell amplitudes with one leg off - shell we present a conjecture for their Grassmannian integral representation in spinor helicity, twistor and momentum twistor parameterizations. The presented conjecture is successfully checked against BCFW results for MHVn, NMHV4 and NMHV5 off - shell amplitudes. We have also verified that our Grassmannian integral representation correctly reproduces soft (on-shell) limit for the off - shell gluon momentum. It is shown that the (deformed) off - shell amplitude expressions could be also obtained using quantum inverse scattering method for auxiliary gl (4 vertical bar 4) super spin chain.
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页数：50
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