Simplicity of polygon Wilson loops in $$ \mathcal{N} $$ = 4 SYM
Simplicity of polygon Wilson loops in $$ \mathcal{N} $$ = 4 SYM
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$$ mathcal{N} $$ = 4 SYM 中多边形威尔逊循环的简单性
DOI:
10.1007/jhep01(2010)050
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发表时间:
2010
影响因子:
5.4
通讯作者:
Brandhuber A
中科院分区:
文献类型:
--
作者:
Brandhuber A
Wilson loops with lightlike polygonal contours have been conjectured to be equivalent to MHV scattering amplitudes in= 4 super Yang-Mills. We compute such Wilson loops for special polygonal contours at two loops in perturbation theory. Specifically, we concentrate on the remainder function, obtained by subtracting the known ABDK/BDS ansatz from the Wilson loop. First, we consider a particular two dimensional eight-point kinematics studied at strong coupling by Alday and Maldacena. We find numerical evidence thatis the same at weak and at strong coupling, up to an overall, coupling-dependent constant. This suggests a universality of the remainder function at strong and weak coupling for generic null polygonal Wilson loops, and therefore for arbitrary MHV amplitudes in= 4 super Yang-Mills. We analyse the consequences of this statement. We further consider regular n-gons, and find that the remainder function is linear in n at large n through numerical computations performed up to n= 30. This reproduces a general feature of the corresponding strong-coupling result.
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DOI:
10.1016/j.nuclphysb.2009.02.015
发表时间:
2008
期刊:
Nuclear Physics
影响因子:
--
作者:
J. Drummond;J. Henn;G. Korchemsky;E. Sokatchev
通讯作者:
E. Sokatchev
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
R. Schabinger
通讯作者:
R. Schabinger
DOI:
10.1016/j.nuclphysb.2007.11.007
发表时间:
2007
期刊:
Nuclear Physics
影响因子:
--
作者:
J. Drummond;J. Henn;G. Korchemsky;E. Sokatchev
通讯作者:
E. Sokatchev
影响因子:
4.4
作者:
G. Korchemsky;A. Radyushkin
通讯作者:
A. Radyushkin
影响因子:
4.4
作者:
J. Drummond;J. Henn;G. Korchemsky;E. Sokatchev
通讯作者:
E. Sokatchev