Chiral coupled channel dynamics of the {lambda}(1520) and the K{sup -}p{yields}{pi}{sup 0}{pi}{sup 0}{lambda} reaction
- Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Aptd. 22085, E-46071 Valencia (Spain)
We study the {lambda}(1520)D{sub 03} in a chiral coupled channel approach. This resonance appears to be dynamically generated from the interaction of the decuplet of baryons and the octet of mesons in s wave, and its treatment is improved here with the phenomenological inclusion of the KN and {pi}{sigma} channels in d wave. Since the most important building block in {lambda}(1520) is the {pi}{sigma}{sup *}(1385)P{sub 13} channel, we study the K{sup -}p{yields}{pi}{sigma}{sup *}(1385)({pi}{sup 0}{lambda}) reaction in the region of {lambda}(1520) and above, and compare the results with recent experimental data. With the coupling of {lambda}(1520) to the {pi}{sigma}{sup *} channel predicted by the theory, we find a cross section in good agreement with the data. There is also agreement for the invariant mass distributions which show a neat peak for {sigma}{sup *}(1385) in the ({pi}{sup 0}{lambda}) spectrum. Predictions are made of a strong {lambda}(1520) resonant peak of the cross section, as a function of the K{sup -} momentum, in the region below the measured data, which, if confirmed experimentally, would give stronger support to the idea of {lambda}(1520) as a dynamically generated resonance.
- OSTI ID:
- 20698858
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 72, Issue 1; Other Information: DOI: 10.1103/PhysRevC.72.015206; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
Similar Records
Partial-wave analysis of the reaction K/sup -/p. --> lambda pi. /sup +/. pi. /sup -/ in the region of the. lambda. (1520) resonance
Unitary coupled channel analysis of the {lambda}(1520) resonance