PROBING THE HEAVY-QUARK CONTENT OF THE PHOTON USING B-TAGGING AT HIGH-ENERGY E-GAMMA AND E(-) COLLIDERS()E()

We suggest a method for probing the quark content of the photon using b tagging at high energy e(+)e(-) and e gamma colliders. We find that heavy quark tagging provides a sensitive and effective probe of the qu ark content of the photon especially in the low x region where the var ious models differ the most. This process is complementary to others t hat have been studied in the literature and can contribute to more pre cise determinations of quark and gluon distributions inside the photon .