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Some emerging difficulties in the theoretical description of exclusivesemileptonic $\bar B$ decays are discussed in the context of the quark model.While there are no unambiguous problems at this time, I discuss physics beyondthe valence quark model which should eventually be probed by precisionmeasurements of $\bar B$ semileptonic decays.Comment: revtex file, 6 pages, no figure

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Exclusive versus inclusive semileptonic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mi>¯</mml:mi></mml:mrow></mml:mover></mml:mrow></mml:mrow></mml:math>decays in the quark model: A reply

Exclusive versus inclusive semileptonicB¯decays in the quark model: A reply