Comments on the two-point string amplitudes
Autor: | Giribet, Gaston, Labranche, Nicholas, La Madrid, Joan |
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Rok vydání: | 2023 |
Předmět: | |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevD.107.106021 |
Popis: | The two-point string amplitude at tree level in flat spacetime reproduces the expected expression for free particles. This has been proven by Erbin, Maldacena and Skliros in [JHEP 07 (2019) 139] by two methods. Here, we provide an alternative proof of this result. Our method consists in considering a timelike Liouville direction as a regularization parameter, which suffices to break time translation invariance and, at the same time, to stabilize the residual conformal symmetry in the worldsheet. This allows taking a limit and restoring Poincare symmetry in a controlled way, thus reproducing the correct expression of the two-point amplitude. Comment: 13 pages. v3 references and comments added. Version accepted for publication |
Databáze: | arXiv |
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