2 papers
hep-lat2024
Lellouch-Lüscher factor for the decays
Jin-Yi Pang, Rishabh Bubna, Fabian Müller +2
We derive an explicit expression for the Lellouch-Lüscher (LL) factor in the decays at leading order (without derivative couplings). Several important technical details…
hep-lat2024
Lüscher equation with long-range forces
Rishabh Bubna, Hans-Werner Hammer, Fabian Müller +3
We derive the modified Lüscher 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 t…