SU(6) prediction ofΛcbranching ratio inB-meson decays

We study two-body baryonic decays of pseudoscalar $B$ mesons to charmed-baryon-antibaryon pairs, where baryons (or antibaryons) are orbital ground states in spin doublets or quartets. The four-fermion interaction theory forbids $F$-wave decays for spin-quartet-quartet final-state configurations. SU(6) symmetry requires that all decay amplitudes are expressed by no more than eight parameters: three for $S$ wave, four for $P$ wave, and one for $D$ wave. Both ${\Lambda }_c$ inclusive and some exclusive branching ratios are studied based on the assumption of two-body dominance in baryonic decays of $B$ mesons. Results are listed in tables.