Study of charmless two-body baryonic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math> decays

We study the charmless two-body decays of $B\to {\bf B}_n \overline{\bf B}_n^\prime$ with $B = ( B^+ , B^0 B^0_s)$ and ${\bf B}_n^{(\prime)}$ low-lying octet baryons. The factorizable amplitudes are calculated by modified bag model, while nonfactorizable ones extracted from experimental data $SU(3)_F$ flavor symmetry. able to explain all current measurements provide predictions on decay branching ratios in B}_n^\prime$. Particularly, we find that ${\cal B}(B_s^0 \to \Xi^0 \overline{\Xi}^0) (19.3\pm 2.7 )\times 10^{-7}$ \Xi^- \overline{\Xi}^-) (19.4\pm 10^{-7}$, which sizable be observed ongoing experiments at LHCb BELLE-II. Furthermore, $B_s^0 (p\overline{p}, n\overline{n})$ $B^0 (\Xi^0 \overline{\Xi}^0 ,\Sigma^+\overline{\Sigma}^+)$ expected $O(10^{-10})$, suppressed due angular momentum conservation chiral