Isospin structure of penguin diagrams and their consequences in B meson physics
Journal
Physical Review Letters
Journal Volume
74
Journal Issue
1
Pages
26-29
Date Issued
1995
Author(s)
Deshpande, N.G.
Abstract
Isospin structure of electroweak penguin diagrams is different from the gluon-mediated or strong penguin. Given the large top mass, these electroweak contributions are significant. This has the consequence that some previous analyses which relied on a simple isospin structurte in charmless B meson decays become inapplicable. We present the general Hamiltonian in next-to-leading order QCD, and illustrate our conclusion quantitatively for B and BK decays in the factorization approximation. Some remarks on CP asymmetries in B meson decays are also made. © 1994 The American Physical Society.
Type
journal article