INFN - Laboratori Nazionali di Frascati, May 1995
From: The Second DAFNE Physics Handbook
Chapter 1: CP and CPT Violation
Eds. L. Maiani, G. Pancheri, N. Paver
Supported by the INFN, by the EC under the HCM contract number CHRX-CT920026 and by the authors home institutions.
, E. Franco
, G. Martinelli
and L. Reina
cm
INFN, Sezione Sanità, V.le Regina Elena 299,
00161 Rome, Italy.
Dip. di Fisica,
Università degli Studi di Roma ``La Sapienza" and
INFN, Sezione di Roma, P.le A. Moro 2, 00185 Rome, Italy.
Theory Division, CERN, 1211 Geneve 23, Switzerland.
Brookhaven National Lab., Physics Department, Upton,
NY 11973, U.S.A.
effective
Hamiltonian,
relevant for 
transitions. Numerical results for the Wilson
coefficients are given for different regularization schemes.
Predictions of 
, obtained using different approaches to
evaluate the relevant hadronic matrix elements, are compared.
Given the present value of the top mass, 
GeV,
all the analyses, in spite of the large theoretical uncertainties,
indicate that the value of 
is smaller than 
.