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- W2006017862 abstract "Corrections of order 1/m_Q (Q=b or c) to the Bethe-Salpeter (B-S) equation for Lambda_Q are analyzed on the assumption that the heavy baryon Lambda_Q is composed of a heavy quark and a scalar, light diquark. It is found that in addition to the one B-S scalar function in the limit m_Q -> infty, two more scalar functions are needed at the order 1/m_Q. These can be related to the B-S scalar function in the leading order. The six form factors for the weak transition Lambda_b -> Lambda_c are expressed in terms of these wave functions and the results are consistent with heavy quark effective theory to order 1/m_Q. Assuming the kernel for the B-S equation in the limit m_Q -> infty to consist of a scalar confinement term and a one-gluon-exchange term we obtain numerical solutions for the B-S wave functions, and hence for the $Lambda_b to Lambda_c$ form factors to order 1/m_Q. Predictions are given for the differential and total decay widths for Lambda_b -> Lambda_c l bar{nu}, and also for the nonleptonic decay widths for Lambda_b -> Lambda_c plus a pseudoscalar or vector meson, with QCD corrections being also included." @default.
- W2006017862 created "2016-06-24" @default.
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- W2006017862 date "2000-05-11" @default.
- W2006017862 modified "2023-10-18" @default.
- W2006017862 title "1/mQcorrections to the Bethe-Salpeter equation forΛQin the diquark picture" @default.
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- W2006017862 doi "https://doi.org/10.1103/physrevd.61.116015" @default.
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