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We calculate the branching ratio of $\bar{B}^0 \to \Lambda_c^+ \bar{p}$ inthe PQCD approach. Most previous model calculations obtained branching ratiossignificantly larger than experimental data. We find that the predictedbranching ratio for BR$(\bar{B}^0 \to \Lambda_c^+ \bar{p})$ in the PQCDapproach can vary over a range of $(2.3\sim 5.1)\times 10^{-5}$ with thelargest uncertainty coming from the parameters in the wave function of$\Lambda_c$. With the favored values for the parameters in the $\Lambda_c^+$wave function, $\beta = 1$ GeV and $m_q = 0.3$ GeV, the branching ratio isabout $2.3\times 10^{-5}$ which is satisfactorily consistent with the valuemeasured by experiments.Comment: 45 pages, 4 figure and 4 tables. New version replace

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

Calculation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>BR</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:msup><mml:mover accent="true"><mml:mi>B</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mn>0</mml:mn></mml:msup><mml:mo>→</mml:mo><mml:msubsup><mml:mi>Λ</mml:mi><mml:mi>c</mml:mi><mml:mo>+</mml:mo></mml:msubsup><mml:mo>+</mml:mo><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mo stretchy="false">)</mml:mo></mml:math>in the …

Calculation ofBR(B¯0→Λc++p¯)in the …