Extraction of a weak phase from $B \\to D^{(*)} \\pi$
Journal
Physical Review
Journal Volume
D65
Pages
054025
Date Issued
2001-10
Author(s)
Abstract
To observe CP-violating asymmetries through the interference of a weaker amplitude with a stronger one in B0 → D(*)π and B̄0 → D(*)π decays, one must collect enough events that the intensity associated with the weaker amplitude would be statistically significant. We show that, provided the weaker amplitude is measured separately in B± → D(*)±π0 decays, the time-integrated approach requires around 2.5×108 BB̄ pairs for measurements of the weak phase sin(2β+γ) with an uncertainty of 0.05 or better. We also determine the optimal conditions for precise 2β+γ measurements and discuss the possibilities for resolving a discrete ambiguity. © 2002 The American Physical Society.
Type
journal article