Little string amplitudes (and the unreasonable effectiveness of 6D SYM)

被引：25

作者：

Chang, Chi-Ming ^{[1
]}

Lin, Ying-Hsuan ^{[1
]}

Shao, Shu-Heng ^{[1
]}

Wang, Yifan ^{[2
]}

Yan, Xi ^{[1
]}

机构：

[1] Harvard Univ, Jefferson Phys Lab, Cambridge, MA 02138 USA

[2] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2014年 / 12期

基金：

美国国家科学基金会;

关键词：

Supersymmetric gauge theory; Gauge-gravity correspondence; Scattering Amplitudes; CONFORMAL SYMMETRY; MATRIX DESCRIPTION; D-BRANES; DIMENSIONS;

D O I：

10.1007/JHEP12(2014)176

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：

We study tree level scattering amplitudes of four massless states in the double scaled little string theory, and compare them to perturbative loop amplitudes in six-dimensional super-Yang-Mills theory. The little string amplitudes are computed from correlators in the cigar coset CFT and in N = 2 minimal models. The results are expressed in terms of integrals of conformal blocks and evaluated numerically in the alpha' expansion. We find striking agreements with up to 2-loop scattering amplitudes of massless gluons in 6D SU(k) SYM at a Z(k) invariant point on the Coulomb branch. We comment on the issue of UV divergence at higher loop orders in the gauge theory and discuss the implication of our results.

引用

页数：52

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