期刊
PHYSICAL REVIEW D
卷 91, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.91.125022
关键词
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资金
- Title A Research Fellowship at St. John's College, Cambridge
- Cambridge Commonwealth, European and International Trust
- STFC [ST/J000434/1, ST/L000385/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J000434/1, ST/L000385/1] Funding Source: researchfish
We describe a theory living on the null conformal boundary I of four-dimensional Minkowski space, the states of which include the radiative modes of Yang-Mills theory. The action of a Kac-Moody symmetry algebra on the correlators of these states leads to a Ward identity for asymptotic large gauge transformations which is equivalent to the soft gluon theorem. The subleading soft gluon behavior is also obtained from a Ward identity for charges acting as vector fields on the sphere of null generators of I. Correlation functions of the Yang-Mills states are shown to produce the full classical S-matrix of Yang-Mills theory. The model contains additional states arising from nonunitary gravitational degrees of freedom, indicating a relationship with the twistor string of Berkovits and Witten.
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