Using the next e(+)-e(-) linear collider, it will be possible to produce, b
y Compton backscattering, highly monochromatic photons of energy, 250 GeV o
r higher. We describe how to use such photons to photoproduce large quantit
ies of B-0-B-0 mesons and tau (+)-tau (-) lepton pairs for studies of CP-vi
olation and tau decay. (C) 2000 Elsevier Science B.V. All rights reserved.