Exact analytical form for the box diagram with one heavy external quark
Journal
Physical Review D
Journal Volume
41
Journal Issue
1
Pages
248-252
Date Issued
1990
Author(s)
Abstract
The exact analytical form for the box-diagram amplitude with one nonvanishing external quark mass is presented. The consequences of this work for meson mixing and the CP-violating charge asymmetry are investigated in heavy-quark systems. In the T0-T»0 system with the three-generation model the charge asymmetry is typically of order 10-4 but the mixing is extremely small (< 10-18). In the four-generation case, the mixing can be greatly enhanced. With a normal Kobayashi-Maskawa (KM) matrix, the mixing is still very small (< 10-10), but with a flavor-flipped KM matrix the mixing can be as large as a few percent while the charge asymmetry is still small (< 10-4). In the B0-B»0 system, the mixing and charge asymmetry can be of the order of a few percent, whereas in the T0-T»0 system the mixing is small. © 1990 The American Physical Society.
Type
journal article