Effective Lorentz force due to small-angle impurity scattering: Magnetotransport in high-T-c superconductors

We show that a scattering rate which varies with angle around the Fermi sur face has the same effect as a periodic Lorentz force on magnetotransport co efficients. This effect, together with the marginal Fermi liquid inelastic scattering rate, gives a quantitative explanation of the temperature depend ence and the magnitude of the observed Hall effect and magnetoresistance wi th just the measured zero-field resistivity as input.