Isospin Violation in ${\bf B\to ππ}$ Decays

Details Isospin Violation in ${\bf B\to ππ}$ Decays Isospin Violation in ${\bf B\to ππ}$ Decays

1999-06-06

arxiv.org/abs/hep-ph/9906269v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, REVTeX, epsf, 1 eps figure, talk at DPF'99

Scientific paper

An isospin analysis of $B\to \pi\pi$ decays yields $\sin 2\alpha$, where $\alpha$ is the usual CKM angle $\alpha\equiv {\rm arg} [-V_{td} V_{tb}^\ast/(V_{ud}V_{ub}^\ast)]$ without hadronic uncertainty if isospin is a perfect symmetry. Yet isospin symmetry is broken not only by electroweak effects but also by the $u$ and $d$ quark mass difference --- the latter drives $\pi^0-\eta,\eta'$ mixing and converts the isospin-perfect triangle relation between the $B\to \pi\pi$ amplitudes to a quadrilateral. The error incurred in $\sin 2\alpha$ through the neglect of the resulting isospin-violating effects can be significant, particularly if $\sin 2\alpha$ is small.

Affiliated with

Also associated with

No associations

Rating

Isospin Violation in ${\bf B\to ππ}$ Decays does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Isospin Violation in ${\bf B\to ππ}$ Decays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isospin Violation in ${\bf B\to ππ}$ Decays will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-516023