Abstract
Λ b semileptonic decay to\(\Lambda _c e\bar v_e \) is studied within the heavy quark effective theory, whereΛ b is moving and polarized along the direction of its motion. Normalized energy distributions ofe andΛ c are both calculated forV±A interactions by taking the
corrections and electronp t cut effects into account. It is shown that the form factor (Isgur-Wise function) effects are significant: The shapes of the distribution curves are thereby considerably changed in comparison with those calculated within the quark model. In case of the electron energy spectrums, the difference between theV±A interactions are enhanced, while that in theΛ c energy spectrums decreases. On the other hand, the
corrections are found to be negligible in both spectrums.
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Hioki, Z. Probingb-quark charged-current chiral structure viaΛ b semileptonic decay. Z. Phys. C - Particles and Fields 59, 555–561 (1993). https://doi.org/10.1007/BF01562547
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DOI: https://doi.org/10.1007/BF01562547