The Delta-resonance in a finite volume
| Autor: | Bernard, V., Meissner, U.G., Rusetsky, A. |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Nuclear Theory
Baryon resonances High Energy Physics - Lattice (hep-lat) lattice field theory FOS: Physical sciences Delta [nucleon resonance] field theory in a finite volume Nuclear Theory (nucl-th) High Energy Physics - Phenomenology lattice QCD High Energy Physics - Lattice High Energy Physics - Phenomenology (hep-ph) pole [propagator] quantum chromodynamics ddc:530 chiral [effective Lagrangian] energy levels numerical calculations Chiral lagrangians |
| Zdroj: | Nuclear physics / B 788, 1-20 (2008). doi:10.1016/j.nuclphysb.2007.07.030 |
| DOI: | 10.48550/arxiv.hep-lat/0702012 |
| Popis: | We study the extraction of Delta-resonance parameters from lattice data for small quark masses, corresponding to the case of an unstable Delta. To this end, we calculate the spectrum of the correlator of two Delta-fields in a finite Euclidian box up-to-and-including O(epsilon^3) in the small scale expansion using infrared regularization. On the basis of our numerical study, we argue that the extraction of the parameters of the Delta-resonance (in particular, of the mass and the pion-nucleon-delta coupling constant) from the measured volume dependence of the lowest energy levels should be feasible. Comment: 20 pages, 8 postscript figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|