Measuring the photon polarization in B -->Kpipigamma.
We propose a way of measuring the photon polarization in radiative B decays into K resonance states decaying to Kpipi, 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 Kpipi decay plane in the K resonance rest frame. The integrated asymmetry in K1(1400)-->Kpipi, calculated to be 0.34 plus/minus 0.05 in the standard model, is measurable at currently operating B factories.
Gronau
Michael
M
Department of Physics, Technion-Israel Institute of Technology, Technion City, 32000 Haifa, Israel.
Grossman
Yuval
Y
Pirjol
Dan
D
Ryd
Anders
A