B → K*ℓ+- decays with polarized K*

C. H. Chen, C. Q. Geng

Research output: Contribution to journalArticlepeer-review


We study the exclusive decays of B → K*ℓ+- within the framework of the PQCD. We obtain the form factors for the B → K* transition in the large recoil region, where the PQCD for heavy B meson decays is reliable. We find that the form factors at q2 = 0 are consistent with those from the large energy effective theory combined with the heavy quark effective theory and the experiment of B → K*γ. Via the decay chain of B → K*(Kπ) ℓ+-, we can study many physical observables which are related to the different helicity combinations of B → K*ℓ+-, such as the forward-backward asymmetries (FBAs). In particular, we can study the T violating effect which is small in the standard model but can be up to 10% in models with new physics.

Original languageEnglish
Pages (from-to)1443-1448
Number of pages6
JournalInternational Journal of Modern Physics A
Issue number8
Publication statusPublished - 2003 Mar 30

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics


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