TY - JOUR
T1 - B → K*ℓ+ℓ- decays with polarized K*
AU - Chen, C. H.
AU - Geng, C. Q.
N1 - Funding Information:
We would like to thank B.Q. Ma for the invitation to this wonderful symposium and for his hospitality during staying at Beijing. We also thank H.N. Li for his useful discussions. This work was supported in part by the National Science Council of the Republic of China under contract numbers Nos. NSC-90-2112-M-001-069 and NSC-90-2112-M-007-040 and the National Center for Theoretical Science.
PY - 2003/3/30
Y1 - 2003/3/30
N2 - We study the exclusive decays of B → K*ℓ+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+ℓ-, we can study many physical observables which are related to the different helicity combinations of B → K*ℓ+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.
AB - We study the exclusive decays of B → K*ℓ+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+ℓ-, we can study many physical observables which are related to the different helicity combinations of B → K*ℓ+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.
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U2 - 10.1142/S0217751X03014861
DO - 10.1142/S0217751X03014861
M3 - Article
AN - SCOPUS:0037473336
SN - 0217-751X
VL - 18
SP - 1443
EP - 1448
JO - International Journal of Modern Physics A
JF - International Journal of Modern Physics A
IS - 8
ER -