A note on tachyon actions in string theory
| dc.creator | Headrick, Matthew | |
| dc.date | 2008-10-15 | |
| dc.date | 2008-12-06 | |
| dc.date.accessioned | 2026-07-07T12:51:19Z | |
| dc.date.available | 2026-07-07T12:51:19Z | |
| dc.description | A number of spacetime fields in string theory (notably the metric, dilaton, bosonic and type 0 bulk closed-string tachyon, and bosonic open-string tachyon) have the following property: whenever the spacetime field configuration factorizes in an appropriate sense, the matter sector of the world-sheet theory factorizes into a tensor product of two decoupled theories. Since the beta functions for such a product theory necessarily also factorize, this property strongly constrains the form of the spacetime action encoding those beta functions. We show that this constraint alone--without needing actually to compute any of the beta functions--is sufficient to fix the form of the two-derivative action for the metric-dilaton system, as well as the potential for the bosonic open-string tachyon. We also show that no action consistent with this constraint exists for the closed-string tachyon coupled to the metric and dilaton. | |
| dc.description | 17 pages; v2: comments on implications for string field theory added; refs added | |
| dc.identifier | https://arxiv.org/abs/0810.2809 | |
| dc.identifier | http://arxiv.org/abs/0810.2809 | |
| dc.identifier | Phys.Rev.D79:046009,2009 | |
| dc.identifier | doi:10.1103/PhysRevD.79.046009 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/222952 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | A note on tachyon actions in string theory | |
| dc.type | text |