CP asymmetry and branching ratio of B -> pi pi

Details CP asymmetry and branching ratio of B -> pi pi CP asymmetry and branching ratio of B -> pi pi

2006-01-31

arxiv.org/abs/hep-ph/0601272v2

Phys.Rev.D74:014010,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 10 figures

Scientific paper

10.1103/PhysRevD.74.014010

We investigate the branching ratios and CP asymmetries of the B -> pi pi processes measured in B factory experiments. Fits to the experimental data of this process indicate a large ratio of color-suppressed (C) to color-allowed (T) tree contributions. We investigate whether the large C/T can be explained within the QCD based model computation with i) a large effect from the end-point singularity or with ii) large final-state-interaction phase between two different isospin amplitudes. We show that the current experimental data do not exclude either possibility but we may be able to distinguish these two effects in future measurements of direct CP asymmetry of B -> pi^0 pi^0.

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