Mixing of pseudoscalar-baryon and vector-baryon in theJP=1/2−sector and theN*(1535) andN*(1650) resonances

Autor:	E. Oset, E. J. Garzon
Rok vydání:	2015
Předmět:	Physics Nuclear and High Energy Physics Particle physics Branching fraction Scattering High Energy Physics::Phenomenology Nuclear Theory Resonance Vector meson dominance Pseudoscalar Baryon Nuclear physics Amplitude Nuclear Experiment Nuclear theory
Zdroj:	Physical Review C. 91
ISSN:	1089-490X 0556-2813
DOI:	10.1103/physrevc.91.025201
Popis:	We study the meson-baryon interaction with J P = 1/2 using the hidden-gauge Lagrangians and mixing pseudoscalar meson-baryon with the vector meson-baryon states in a coupled channels scheme withN, �N, K�, K�, �N and �� (d-wave). We fit the subtraction constants of each channel to the S11 partial wave amplitude of theN scattering data extracted from experimental data. We find two poles that we associate to the N � (1535) and the N � (1650) resonances and show that the subtraction constants are all negative and of natural size. We calculate the branching ratios for the different channels of each resonance and we find a good agreement with the experimental data. The cross section for thep ! �n scattering is also evaluated and compared with experiment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b40987713a3366e4ddbd7cadb09f1b8f https://doi.org/10.1103/physrevc.91.025201 Zobrazit plný text záznamu