Joaquim Prades, Johan Bijnens, Elvira Gamiz
The B_K Kaon Parameter in the 1/N_c
Expansion
Invited Talk given by J.P. at the "Large N_c QCD
Workshop", 59 July 2004, Trento, Italy
Abstract
We present work going on calculating the kaon B_K parameter
in the 1/N_c expansion. The goal of this work is to analyze
analytically in the presence of chiral corrections this
phenomenologically very important parameter. We present the
method used and preliminary results for the chiral limit
value for which we get the invariant \hat B_K^\chi=0.29 \pm
0.15. We also give some analytical indications of why the
large N_c prediction of \hat B_K= 3/4 may have small 1/N_c
corrections in the real case.
LU TP 0503, hepph/0501177
