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- Title
Lepton polarization in B → K1ℓ+ℓ− decays.
- Authors
Bashiry, V.
- Abstract
We study the single and double lepton polarization asymmetries in the semileptonic B meson decays B → K1(1270)ℓ+ℓ− ℓ≡e, μ, τ), where the strange P-wave meson, K1(1270), is the mixtures of the K1A and K1B, which are the 13P1 and 11P1 states, respectively. The lepton polarization asymmetries show relatively strong dependency in the various region of dileptonic invariant mass. The lepton polarization asymmetries can also be used for determining the K1(1270)–K1(1400) mixing angle, θK1 and new physics effects. Furthermore, it is shown that these asymmetries in B → K1(1270)ℓ+ℓ− decay compared with those of B → K*ℓ+ℓ− decay are more sensitive to the dileptonic invariant mass.
- Publication
Journal of High Energy Physics, 2009, Vol 2009, Issue 6, p062
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1088/1126-6708/2009/06/062