Abstract
Chiral shift symmetries of the massless free bosons in two dimensions are global symmetries that are somewhat similar to asymptotic symmetries. They are most transparent in double-null coordinates where they are parametrized by two functions of one variable. In BMS-type coordinates, half of them appear as an infinite tower of sub-leading super-shift symmetries.
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Acknowledgments
G.B. is supported by the F.R.S.-FNRS Belgium through convention FRFC PDR T.1025.14 and IISN 4.4514.08. H.G. is supported by FONDECYT grants 1230853, 1221920 and the ANID/ACT210100 ANILLO grant. The authors thank M. Henneaux, G. Giribet and A. Pérez for useful discussions. Research at Perimeter Institute is supported in part by the Government of Canada through the Department of Innovation, Science and Economic Development Canada and by the Province of Ontario through the Ministry of Colleges and Universities.
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Barnich, G., Ciambelli, L. & González, H.A. Chiral shift symmetries as an infinite tower of subleading super-shift symmetries. J. High Energ. Phys. 2024, 29 (2024). https://doi.org/10.1007/JHEP08(2024)029
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DOI: https://doi.org/10.1007/JHEP08(2024)029