Celestial Liouville theory for Yang-Mills amplitudes

Celestial Liouville theory for Yang-Mills amplitudes
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杨米尔斯振幅的天体刘维尔理论

DOI:
10.1016/j.physletb.2022.137588
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发表时间:
2023
期刊:
影响因子:
4.4
通讯作者:
Zhu, Bin
Zhu, Bin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Stieberger, Stephan;Taylor, Tomasz R.;Zhu, Bin

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我们考虑耦合常数和角由动态(复零质量)膨胀场的真空期望值决定的Yang-Mills理论。我们讨论了在非平凡背景膨胀场存在下的树能级n -胶子MHV散射振幅,并通过对光锥框架能量进行梅林变换来构造相应的天体振幅。通过这种方法,我们得到了天球上主场的二维CFT相关器。我们证明了在球面膨胀激波存在下的天体Yang-Mills振幅由原始场算子的相关函数分解成全纯电流算子乘以“光”Liouville算子给出。它们在刘维尔理论的半经典极限(无限中心电荷的极限)中被评估,并由描述天球上度量的经典刘维尔场决定。
We consider Yang-Mills theory with the coupling constant and theta angle determined by the vacuum expectation values of a dynamical (complex, zero mass) dilaton field. We discuss the tree-levelN-gluon MHV scattering amplitudes in the presence of a nontrivial background dilaton field and construct the corresponding celestial amplitudes by taking Mellin transforms with respect to the light cone frame energies. In this way, we obtain two-dimensional CFT correlators of primary fields on the celestial sphere. We show that the celestial Yang-Mills amplitudes evaluated in the presence of a spherical dilaton shockwave are given by the correlation functions of primary field operators factorized into the holomorphic current operators times the “light” Liouville operators. They are evaluated in the semiclassical limit of Liouville theory (the limit of infinite central charge) and are determined by the classical Liouville field describing metrics on the celestial sphere.
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影响因子: 5.4
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