  The production of heavy quarks has been studied in photoproduction processes
with the ZEUS detector at HERA using an integrated luminosity of $36.9
pb^{-1}$. Events with a photon virtuality, $Q^2<1 GeV^2$, were selected with
two jets of high transverse energy and an electron in the final state.
Consideration of the distribution in $p_T^{rel}$ - the momentum of the electron
transverse to the axis of the jet to which the electron is closest - allows a
measurement of the beauty cross-section in a restricted region of phase space.
