EPJ Web Conf.
Volume 191, 2018XXth International Seminar on High Energy Physics (QUARKS-2018)
|Number of page(s)||10|
|Section||Modern Field Theory and Mathematical Physics|
|Published online||31 October 2018|
Asymptotic symmetries and charges at null infinity: from low to high spins
Institut für Theoretische Physik, ETH Zürich, Wolfgang-Pauli-Strasse 27, 8093 Zürich, Switzerland
2 Museo Storico della Fisica e Centro Studi e Ricerche E. Fermi, Piazza del Viminale 1, I-00184 Roma, Italy
3 Roma Tre University and INFN, Via della Vasca Navale 84, I-00146 Roma, Italy
4 Scuola Normale Superiore and INFN, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
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Published online: 31 October 2018
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.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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