Conformal blocks from celestial gluon amplitudes. Part II. Single-valued correlators
Conformal blocks from celestial gluon amplitudes. Part II. Single-valued correlators
复制标题
天体胶子振幅的共形块。
DOI:
10.1007/jhep11(2021)179
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发表时间:
2021
影响因子:
5.4
通讯作者:
Zhu, Bin
中科院分区:
文献类型:
--
作者:
Fan, Wei;Fotopoulos, Angelos;Stieberger, Stephan;Taylor, Tomasz R.;Zhu, Bin
In a recent paper, here referred to as part I, we considered the celestial four-gluon amplitude with one gluon represented by the shadow transform of the corresponding primary field operator. This correlator is ill-defined because it contains branch points related to the presence of conformal blocks with complex spin. In this work, we adopt a procedure similar to minimal models and construct a single-valued completion of the shadow correlator, in the limit when the shadow is “soft.” By following the approach of Dotsenko and Fateev, we obtain an integral representation of such a single-valued correlator. This allows inverting the shadow transform and constructing a single-valued celestial four-gluon amplitude. This amplitude is drastically different from the original Mellin amplitude. It is defined over the entire complex plane and has correct crossing symmetry, OPE and bootstrap properties. It agrees with all known OPEs of celestial gluon operators. The conformal block spectrum consists of primary fields with dimensions∆= m+ iλ, with integer m≥ 1 and various, but always integer spin, in all group representations contained in the product of two adjoint representations.
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DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
S. Stieberger
通讯作者:
S. Stieberger
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
W. Fan;A. Fotopoulos;S. Stieberger;T. R. Taylor
通讯作者:
T. R. Taylor
影响因子:
5.4
作者:
Crawley, Erin;Miller, Noah;Narayanan, Sruthi A.;Strominger, Andrew
通讯作者:
Strominger, Andrew
DOI:
--
发表时间:
2014
期刊:
Springer Proceedings in Mathematics & statistics
影响因子:
--
作者:
S. Stieberger
通讯作者:
S. Stieberger
影响因子:
4.4
作者:
S. Stieberger;T. R. Taylor
通讯作者:
T. R. Taylor