FIZIKA B 10 (2001)  4, 307-356

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WEAK MESON VERTICES AND THE HYPERNUCLEAR POTENTIAL

CESAR BARBEROa,1, DUBRAVKO HORVATb,2, FRANJO KRMPOTIĆa,3, ZORAN NARANČIĆb and DUBRAVKO TADIĆc,4

aDepartamento de Física, Facultad de Ciencias, Universidad Nacional de La Plata,
C. C. 67, 1900 La Plata, Argentina

bDepartment of Physics, Faculty of Electrical Engineering, University of Zagreb,
HR-10000 Zagreb, Croatia

cPhysics Department, University of Zagreb, HR-10000 Zagreb, Croatia

E-mail addresses: 1barbero@venus.fisica.unlp.edu.ar, 2dubravko.horvat@fer.hr, 3krmpotic@venus.fisica.unlp.edu.ar, 4tadic@phy.hr

Dedicated to Professor Kseno Ilakovac on the occasion of his 70th birthday

Received 30 October 2001; Accepted 21 January 2002
Online 6 April 2002

This paper is a continuation of an earlier paper on hypernuclear potentials. A novel derivation of the hypernuclear strangeness-violating potential due to the pseudoscalar meson exchanges is presented. Comparison with the earlier method shows that the theoretical uncertainty is less than 30%. Relative signs of pseudoscalar meson exchanges and vector (axial vector) exchanges are discussed in detail. Additional comments on the nonrelativistic approximation are included.

PACS numbers: 21.80.+a
UDC 539.126

Keywords: hypernuclear potentials, strangeness-violating potential, pseudoscalar meson exchange, vector (axial vector) exchange, nonrelativistic approximation

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