Quark-diagram estimates ofCP violation in two-body baryonicB_d^0 - bar B_d^0 decays

CP violation in partial-decay-rate asymmetries are examined for some two-body baryonic decays of (B_d^0 - bar B_d^0 ) system. We discuss two feasible experimental circumstances: the symmetrice ⁺ e ^? collisions (i) on theZ ⁰ resonance to produce incoherent (B_d^0 bar B_d^0 ) states, and (ii) just above the ?(4S) resonance to produceC=even (B_d^0 bar B_d^0 ) states. Using the quark-diagram scheme, we estimate the branching ratios of those decays, and the numbers ofb (bar b) pairs needed for testing theCP-violating effects for 3σ signature. We find that the promising channels may beB _d ⁰ , (bar B_d^0 to pbar p) , (Delta ^ + bar Delta ^ - ) , (pbar Delta ^ - ) , (Delta ^ + bar p) , (nbar n) , (Delta ^0 bar Delta ^0 ) , (nbar Delta ^0 ) , (Delta ^0 bar n) , (Sigma _c^ + bar Sigma _c^ - ) , (Lambda _c^ + bar Lambda _c^ - ) , (Sigma _c^ + bar Lambda _c^ - ) , (Lambda _c^ + bar Sigma _c^ - ) , (Sigma _c^0 bar Sigma _c^0 ) , (Xi _c^0 bar Xi _c^0 ) , which should be interesting for experimental observation.