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arXiv · hep-ph/9611300

Rho meson properties in the Nambu-Jona-Lasinio model

A. Polleri·R. A. Broglia·P. M. Pizzochero·N. N. Scoccola
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Abstract

Some properties of the rho vector meson are calculated within the Nambu-Jona-Lasinio model, including processes that go beyond the random phase approximation. To classify the higher order contributions, we adopt $1/N_c$ as expansion parameter. In particular, we evaluate the leading order contributions to the $ρ\rightarrow ππ$ decay width, obtaining the value $Γ= 118$ MeV, and to the shift of the rho mass which turns out to be lowered by 64 MeV with respect to its RPA value. A set of model parameters is determined accordingly.

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A. Polleri, R. A. Broglia, P. M. Pizzochero, N. N. Scoccola. 1996-11-11. Rho meson properties in the Nambu-Jona-Lasinio model. https://doi.org/10.1007/s002180050249

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