L\'uscher equation with long-range forces
Autor: | Bubna, Rishabh, Hammer, Hans-Werner, Müller, Fabian, Pang, Jin-Yi, Rusetsky, Akaki, Wu, Jia-Jun |
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Rok vydání: | 2024 |
Předmět: | |
Druh dokumentu: | Working Paper |
Popis: | We derive the modified L\"uscher equation in the presence of the long-range force caused by the exchange of a light particle. It is shown that the use of this equation enables one to circumvent the problems related to the strong partial-wave mixing and the t-channel sub-threshold singularities. It is also demonstrated that the present method is intrinsically linked to the so-called modified effective-range expansion (MERE) in the infinite volume. A detailed comparison with the two recently proposed alternative approaches is provided. Comment: 28 pages, 4 figures |
Databáze: | arXiv |
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