Sizable time-reversal violating effects in bottom baryon decays

We study time-reversal~(T) asymmetries in the charmless two-body decays of antitriplet bottom baryons. find that ${\bf B}_b \to {\bf B}_n P$ with = (\Xi _b ^- , \,\Xi_b^0, \,\Lambda_b)$ and B}_n(P)$ a octet baryon (pseudoscalar meson), positive negative helicity amplitudes are both sizable, resulting large T-violating effects. Particularly, T-odd parameters, $\beta_w$, for color-enhanced channels expected to be around $40\%$ $-25\%$ $b\to s $ d transitions standard model, which can measured by experiments at LHCb, respectively. On other hand, V(\gamma)$ $V(\gamma)$ vector meson~(photon), predominated single amplitude, T violating effects correlations among spins suppressed. also explore observables $\Xi_b$ based on angular distributions.