Taming the ϵ-expansion with large spin perturbation theory
Abstract We apply analytic bootstrap techniques to the four-point correlator of fundamental fields in the Wilson-Fisher model. In an ϵ-expansion crossing symmetry fixes the double discontinuity of the correlator in terms of CFT data at lower orders. Large spin perturbation theory, or equivalently th...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-07-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP07(2018)131 |
| _version_ | 1818887215559737344 |
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| author | Luis F. Alday Johan Henriksson Mark van Loon |
| author_facet | Luis F. Alday Johan Henriksson Mark van Loon |
| author_sort | Luis F. Alday |
| collection | DOAJ |
| description | Abstract We apply analytic bootstrap techniques to the four-point correlator of fundamental fields in the Wilson-Fisher model. In an ϵ-expansion crossing symmetry fixes the double discontinuity of the correlator in terms of CFT data at lower orders. Large spin perturbation theory, or equivalently the recently proposed Froissart-Gribov inversion integral, then allows one to reconstruct the CFT data of intermediate operators of any spin. We use this method to compute the anomalous dimensions and OPE coefficients of leading twist operators. To cubic order in ϵ the double discontinuity arises solely from the identity operator and the scalar bilinear operator, making the computation straightforward. At higher orders the double discontinuity receives contributions from infinite towers of higher spin operators. At fourth order, the structure of perturbation theory leads to a proposal in terms of functions of certain degree of transcendentality, which can then be fixed by symmetries. This leads to the full determination of the CFT data for leading twist operators to fourth order. |
| first_indexed | 2024-12-19T16:33:41Z |
| format | Article |
| id | doaj.art-066fd147cc724276ac6ff2b819247f48 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-19T16:33:41Z |
| publishDate | 2018-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-066fd147cc724276ac6ff2b819247f482022-12-21T20:14:02ZengSpringerOpenJournal of High Energy Physics1029-84792018-07-012018712110.1007/JHEP07(2018)131Taming the ϵ-expansion with large spin perturbation theoryLuis F. Alday0Johan Henriksson1Mark van Loon2Mathematical Institute, University of OxfordMathematical Institute, University of OxfordMathematical Institute, University of OxfordAbstract We apply analytic bootstrap techniques to the four-point correlator of fundamental fields in the Wilson-Fisher model. In an ϵ-expansion crossing symmetry fixes the double discontinuity of the correlator in terms of CFT data at lower orders. Large spin perturbation theory, or equivalently the recently proposed Froissart-Gribov inversion integral, then allows one to reconstruct the CFT data of intermediate operators of any spin. We use this method to compute the anomalous dimensions and OPE coefficients of leading twist operators. To cubic order in ϵ the double discontinuity arises solely from the identity operator and the scalar bilinear operator, making the computation straightforward. At higher orders the double discontinuity receives contributions from infinite towers of higher spin operators. At fourth order, the structure of perturbation theory leads to a proposal in terms of functions of certain degree of transcendentality, which can then be fixed by symmetries. This leads to the full determination of the CFT data for leading twist operators to fourth order.http://link.springer.com/article/10.1007/JHEP07(2018)131Conformal Field TheoryRenormalization GroupConformal and W Symmetry |
| spellingShingle | Luis F. Alday Johan Henriksson Mark van Loon Taming the ϵ-expansion with large spin perturbation theory Journal of High Energy Physics Conformal Field Theory Renormalization Group Conformal and W Symmetry |
| title | Taming the ϵ-expansion with large spin perturbation theory |
| title_full | Taming the ϵ-expansion with large spin perturbation theory |
| title_fullStr | Taming the ϵ-expansion with large spin perturbation theory |
| title_full_unstemmed | Taming the ϵ-expansion with large spin perturbation theory |
| title_short | Taming the ϵ-expansion with large spin perturbation theory |
| title_sort | taming the ϵ expansion with large spin perturbation theory |
| topic | Conformal Field Theory Renormalization Group Conformal and W Symmetry |
| url | http://link.springer.com/article/10.1007/JHEP07(2018)131 |
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