Instanton effects in correlation functions on the light-cone
Abstract We study instanton corrections to four-point correlation correlation function of half-BPS operators in N $$ \mathcal{N} $$ = 4 SYM in the light-cone limit when operators become null separated in a sequential manner. We exploit the relation between the correlation function in this limit and...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-12-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | http://link.springer.com/article/10.1007/JHEP12(2017)093 |
| Summary: | Abstract We study instanton corrections to four-point correlation correlation function of half-BPS operators in N $$ \mathcal{N} $$ = 4 SYM in the light-cone limit when operators become null separated in a sequential manner. We exploit the relation between the correlation function in this limit and light-like rectangular Wilson loop to determine the leading instanton contribution to the former from the semiclassical result for the latter. We verify that the light-like rectangular Wilson loop satisfies anomalous conformal Ward identities nonperturbatively, in the presence of instantons. We then use these identities to compute the leading instanton contribution to the light-like cusp anomalous dimension and to anomalous dimension of twist-two operators with large spin. |
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| ISSN: | 1029-8479 |