Bound states from the spectral Bethe-Salpeter equation
| Autor: | Eichmann, Gernot, Gómez, Andrés, Horak, Jan, Pawlowski, Jan M., Wessely, Jonas, Wink, Nicolas |
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| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We compute the bound state properties of three-dimensional scalar $\phi^4$ theory in the broken phase. To this end, we extend the recently developed technique of spectral Dyson-Schwinger equations to solve the Bethe-Salpeter equation and determine the bound state spectrum. We employ consistent truncations for the two-, three- and four-point functions of the theory that recover the scaling properties in the infinite coupling limit. Our result for the mass of the lowest-lying bound state in this limit agrees very well with lattice determinations. Comment: 15 pages, 16 figures |
| Databáze: | arXiv |
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