Renormalization group and scattering-equivalent Hamiltonians on a coarse momentum grid
Metadatos
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Jagiellonian University
Fecha
2021Referencia bibliográfica
Gómez, M. & Ruiz, E. (2021). Renormalization group and scattering-equivalent Hamiltonians on a coarse momentum grid. Acta Physica Polonica B Proceedings Supplement, nº 1, vol. 14. DOI:[10.5506/APhysPolBSupp.14.101]
Patrocinador
Spanish Government FIS2017-85053-C2-1-P; European Commission FIS2017-85053-C2-1-P; Junta de Andalucia FQM-225; Juan de la Cierva-Incorporacion Programme IJCI-2017-31531Resumen
We consider the 7r7r-scattering problem in the context of the Kadyshevsky equation. In this scheme, we introduce a momentum grid and provide an isospectral definition of the phase shift based on the spectral shift of a Chebyshev angle. We address the problem of the unnatural high momentum tails present in the fitted interactions which reaches energies far beyond the maximal center-of-mass energy of root s = 1.4 GeV. It turns out that these tails can be integrated out by using a block-diagonal generator of the SRG.