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  Extended BMS Algebra of Celestial CFT

Fotopoulos, A., Stieberger, S., Taylor, T. R., & Zhu, B. (2020). Extended BMS Algebra of Celestial CFT. Journal of High Energy Physics, 2003, 130. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2019-264.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0008-1C07-2 Version Permalink: https://hdl.handle.net/21.11116/0000-0008-1C08-1
Genre: Journal Article

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https://publications.mppmu.mpg.de/2019/MPP-2019-264/FullText.10973.pdf (Any fulltext)
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http://arxiv.org/abs/arXiv:1912.10973 (Any fulltext)
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 Creators:
Fotopoulos, Angelos1, Author
Stieberger, Stephan1, Author
Taylor, Tomasz R.1, Author
Zhu, Bin1, Author
Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650              

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Free keywords: Field Theory
 Abstract: We elaborate on the proposal of flat holography in which four-dimensional physics is encoded in two-dimensional celestial conformal field theory (CCFT). The symmetry underlying CCFT is the extended BMS symmetry of (asymptotically) flat spacetime. We use soft and collinear theorems of Einstein-Yang-Mills theory to derive the OPEs of BMS field operators generating superrotations and supertranslations. The energy-momentum tensor, given by a shadow transform of a soft graviton operator, implements superrotations in the Virasoro subalgebra of $\mathfrak{bms_4}$. Supertranslations can be obtained from a single translation generator along the light-cone direction by commuting it with the energy-momentum tensor. This operator also originates from a soft graviton and generates a flow of conformal dimensions. All supertranslations can be assembled into a single primary conformal field operator on celestial sphere.

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 Dates: 2020
 Publication Status: Issued
 Pages: -
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 Rev. Type: -
 Identifiers: Other: MPP-2019-264
URI: https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2019-264
arXiv: arxiv:1912.10973
URI: https://inspirehep.net/search?p=find+eprint+1912.10973
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Title: Journal of High Energy Physics
  Abbreviation : JHEP
Source Genre: Journal
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Pages: - Volume / Issue: 2003 Sequence Number: - Start / End Page: 130 Identifier: -