Remarks on a Technique of Measuring CP phase $α$

Details Remarks on a Technique of Measuring CP phase $α$ Remarks on a Technique of Measuring CP phase $α$

1996-04-16

arxiv.org/abs/hep-ph/9604336v1

Phys.Lett.B384:283-287,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages (Latex), 1 PS fig (uuencoded, epsf.tex)

Scientific paper

10.1016/0370-2693(96)00515-1

We present a method to measure the CKM phase $\alpha$ and the tree and penguin (strong and electroweak) amplitudes in $B \rightarrow \pi \pi$ decays, based on isospin consideration and the weak assumption that all tree amplitudes have a common strong phase and all penguin amplitudes have a different common phase. The method needs only the time-independent measurements of the relevant decay rates in $B \rightarrow \pi \pi$. We also propose a method to experimentally examine the validity of the assumption that all penguin amplitudes have the same strong phases, and to extract detailed informations about the hadronic matrix elements.

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