Extracting and using photon polarization information in radiative B decays
نویسندگان
چکیده
We discuss the uses of conversion electron pairs for extracting photon polarization information in weak radiative B decays. Both cases of leptons produced through a virtual and real photon are considered. Measurements of the angular correlation between the (Kπ) and (e+e−) decay planes in B → K∗(→ Kπ)γ(∗)(→ e+e−) decays can be used to determine the helicity amplitudes in the radiative B → K∗γ decay. A large right-handed helicity amplitude in B̄ decays is a signal of new physics. The time-dependent CP asymmetry in the B0 decay angular correlation is shown to measure sin 2β and cos 2β with little hadronic uncertainty. Typeset using REVTEX Research at SLAC is supported by the Department of Energy under contract DE-AC03-76SF00515
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