Asymptotic symmetries and charges at null infinity: from low to high spins
| Autor: | Campoleoni, A., Francia, D., Heissenberg, C. |
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| Rok vydání: | 2018 |
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| Druh dokumentu: | Working Paper |
| Popis: | Weinberg's celebrated factorisation theorem holds for soft quanta of arbitrary integer spin. The same result, for spin one and two, has been rederived assuming that the infinite-dimensional asymptotic symmetry group of Maxwell's equations and of asymptotically flat spaces leave the S-matrix invariant. For higher spins, on the other hand, no such infinite-dimensional asymptotic symmetries were known and, correspondingly, no a priori derivation of Weinberg's theorem could be conjectured. In this contribution we review the identification of higher-spin supertranslations and superrotations in $D=4$ as well as their connection to Weinberg's result. While the procedure we follow can be shown to be consistent in any $D$, no infinite-dimensional enhancement of the asymptotic symmetry group emerges from it in $D>4$, thus leaving a number of questions unanswered. Comment: 11 pages. Contribution to the proceedings of Quarks-2018, XXth International Seminar on High Energy Physics; Valday, Russia, 27 May - 2 June 2018 |
| Databáze: | arXiv |
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