PROBING B-QUARK CHARGED-CURRENT CHIRAL STRUCTURE VIA POLARIZED-LAMBDA-B SEMILEPTONIC DECAY

LAMBDA(b) semileptonic decay to LAMBDA(c)ev(e)BAR is studied within th e heavy quark effective-theory, where LAMBDA(b) is moving and polarize d along the direction of its motion. Normalized energy distributions o f e and LAMBDA(c) are both calculated for V+/-A interactions by taking the O(LAMBDABAR/m(c)) (LAMBDABAR=m(LAMBDA)c-m(c)) corrections and ele ctron p(t) cut effects into account. It is shown that the form factor (Isgur-Wise function) effects are significant: The shapes of the distr ibution curves are thereby considerably changed in comparison with tho se calculated within the quark model. In case of the electron energy s pectrums, the difference between the V+/-A interactions are enhanced, while that in the LAMBDA(c) energy spectrums decreases. On the other h and, the O(LAMBDABAR/m(c)) corrections are found to be negligible in b oth spectrums.