Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-03-12
Phys.Rev.C58:1333-1336,1998
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 3 figures, LATEX
Scientific paper
10.1103/PhysRevC.58.1333
The processes involving $K^{-}p, KN, \Sigma\pi, \Lambda\pi,\Sigma\eta, \Lambda\eta$ coupled channels are studied in the nonperturbative chiral approach. An effective potential is constructed using a chiral meson-baryon Lagrangian at lowest order. This potential is iterated to all orders with the Lippmann-Schwinger equation. A reasonable fit of the experimental data is obtained. It is pointed out, however, that due to a strong sensitivity of the results to the value of the cut-off, such an approach should be viewed as a rather phenomenological way to fit the experimental data since there is no small expansion parameter allowing for truncation of the chiral expansion of the effective potential at some given order. A possible way to construct the consistent chiral expansion is briefly discussed
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