Strong phase shifts and color-suppressed tree amplitudes in B → DK* and B → Dπ, Dρ decays

C. S. Kim, Sechul Oh, Chaehyun Yu

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11 Citations (Scopus)


We analyze the decay processes B → DK, DK*, Dπ, and Dρ in a model-independent way. Using the quark diagram approach, we determine the magnitudes of the relevant amplitudes and the relative strong phase shifts. In order to find the most likely values of the magnitudes and the relative strong phases of the amplitudes in a statistically reliable way, we use the χ2 minimization technique. We find that the strong phase difference between the color-allowed and the color-suppressed tree amplitude can be large and is non-zero at 1σ level with the present data. The color-suppressed tree contributions are found to be sizably enhanced. We also examine the validity of factorization and estimate the breaking effects of flavor SU(3) symmetry in B → DK, Dπ and in B → DK*, Dρ.

Original languageEnglish
Pages (from-to)259-268
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
Publication statusPublished - 2005 Aug 18

Bibliographical note

Funding Information:
The work of C.S.K. was supported in part by CHEP-SRC Program, in part by Grant No. R02-2003-000-10050-0 from BRP of the KOSEF and in part by 2004 Yonsei University Grant. The work of S.O. was supported by Korea Research Foundation Grant (KRF-2004-050-C00005). The work of C.Y. was supported in part by Brain Korea 21 Program and in part by Grant No. F01-2004-000-10292-0 of KOSEF-NSFC International Collaborative Research Grant.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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