Determining the Factorization Parameter and Strong Phase Differences in B-->D^(*)πDecays

2001/07/30 by Zhi-zhong Xing
Physics and Astronomy · #hep-ph #hep-ex

paper · pdf

published as High Energy Phys.Nucl.Phys. 26 (2002) 100-103 · LaTex 6 pages. A crucial numerical error corrected, the CLEO data included, the acknowledgement changed

arxiv created 2001/07/30 · arxiv updated 2009/11/30

Abstract

The first observation of the color-suppressed decay mode B⁰_d --> D^(*)0 π⁰ by the Belle and CLEO Collaborations makes a quantitative analysis of the isospin relations for the amplitudes of B --> D^(*)πpossible. The strong (isospin) phase difference in B --> Dπtransitions is found to be about 29^∘ by use the Belle data or 26^∘ by use of the CLEO data, implying that final-state interactions might not be negligible. Applying the factorization approximation to I=3/2 and I=1/2 isospin amplitudes of B --> Dπdecays, we obtain the ratio of the effective Wilson coefficients a^eff₁ and a^eff₂: a^eff₂/a^eff₁ ≈ 0.27. A similar analysis shows that the magnitude of final-state interactions in B --> D^*πmight be comparable with that in B --> Dπ, and the factorization hypothesis works consistently in both of them.

Related

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• Measurement of the strong-phase difference between D⁰ and D⁰→ K⁺K^-π⁺π^- in bins of phase space
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