Measuring the Photon Helicity in Radiative B Decays

Abstract

We propose a way of measuring the photon polarization in radiative B decays into K resonance states decaying to Kππ, which can test the Standard Model and probe new physics. The photon polarization is shown to be measured by the up-down asymmetry of the photon direction relative to the Kππdecay plane in the K resonance rest frame. The integrated asymmetry in K_1(1400)\to Kππ, calculated to be 0.34\pm 0.05 in the Standard Model, is measurable at currently operating B factories.

4 pages, final version to appear in Physical Review Letters

References in corpus (1)

• Rare radiative B decays to orbitally excited K mesons

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