Measuring the Photon Helicity in Radiative B Decays

Details Measuring the Photon Helicity in Radiative B Decays Measuring the Photon Helicity in Radiative B Decays

2001-07-25

arxiv.org/abs/hep-ph/0107254v3

Phys.Rev.Lett. 88 (2002) 051802

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, final version to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.88.051802

We propose a way of measuring the photon polarization in radiative B decays into K resonance states decaying to K\pi\pi, 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 K\pi\pi decay plane in the K resonance rest frame. The integrated asymmetry in K_1(1400)\to K\pi\pi, calculated to be 0.34\pm 0.05 in the Standard Model, is measurable at currently operating B factories.

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