Charmless two-body anti-triplet $b$-baryon decays

Abstract

We study the charmless two-body decays of $b$-baryons $({\Lambda }_b$, ${\Xi }_b^{-}$, ${\Xi }_b^0)$. We find that $\mathcal{B}({\Xi }_b^{-}\to \Lambda {\rho }^{-})=(2.08_{-0.51}^{+0.69})\times 10^{-6}$ and $\mathcal{B}({\Xi }_b^0\to {\Sigma }^{+}{M}^{-})=(4.45_{-1.09}^{+1.46},11.49_{-2.9}^{+3.8},4.69_{-0.79}^{+1.11},2.98_{-0.51}^{+0.76})\times 10^{-6}$ for $M^{-}=({\pi }^{-},{\rho }^{-},K^{-},K^{\ast -})$, which are compatible to $\mathcal{B}({\Lambda }_b\to p{\pi }^{-},p{K}^{-})$. We also obtain that $\mathcal{B}({\Lambda }_b\to \Lambda \omega )=(2.30\pm 0.10)\times 10^{-6}$, $\mathcal{B}({\Xi }_b^{-}\to {\Xi }^{-}\varphi ,{\Xi }^{-}\omega )\simeq \mathcal{B}({\Xi }_b^0\to {\Xi }^0\varphi ,{\Xi }^0\omega )=(5.35\pm 0.41,3.65\pm 0.16)\times 10^{-6}$ and $\mathcal{B}({\Xi }_b^{-}\to {\Xi }^{-}{\eta }^{(\prime )})\simeq \mathcal{B}({\Xi }_b^0\to {\Xi }^0{\eta }^{(\prime )})=(2.51_{-0.46}^{+0.70},2.99_{-0.57}^{+1.16})\times 10^{-6}$. For the CP violating asymmetries, we show that ${\mathcal{A}}_{CP}({\Lambda }_b\to p{K}^{\ast -})={\mathcal{A}}_{CP}({\Xi }_b^{-}\to {\Sigma }^0(\Lambda )K^{\ast -})={\mathcal{A}}_{CP}({\Xi }_b^0\to {\Sigma }^{+}{K}^{\ast -})=(19.7\pm 1.4)\%$. Similar to the charmless two-body ${\Lambda }_b$ decays, the ${\Xi }_b$ decays are accessible to the LHCb detector.

13 pages, no figure, version accepted by PRD

References in corpus (4)

• Direct observation of the strange b baryon Xi_b^{-}
• Direct CP violation in ${\Lambda }_b$ decays
• Observation of the ${\Lambda }_b^0\to J/\psi p{\pi }^{-}$ decay
• Observation of the decay ${\Xi }_b^{-}\to p{K}^{-}{K}^{-}$

Cited by in corpus (21)

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• The semi-leptonic and non-leptonic weak decays of ${\Lambda }_b^0$
• ${\Lambda }_b\to p$ transition form factors in perturbative QCD
• Nonleptonic two-body weak decays of ${\Lambda }_b$ in modified MIT bag model
• Non-leptonic beauty baryon decays and $CP$-asymmetries based on $SU(3)$-Flavor analysis
• Study of $\itΛ_{\it{b}}^\rm{0}$ and $\itΞ_{\it{b}}^\rm{0}$ decays to $\Lambda h^{+}{h}^{{}^{\prime }-}$ and evidence for $CP$ violation in $\itΛ_{\it{b}}^\rm{0}\to\itΛ K^+K^-$ decays
• Direct CP violation in internal W-emission dominated baryonic B decays
• Time-reversal asymmetries and angular distributions in ${\Lambda }_b\to \Lambda V$
• Non-leptonic two-body decays of ${\Lambda }_b^0$ in light-front quark model
• Estimates of exchange topological contributions and $CP$-violating observables in ${\Lambda }_b\to \Lambda \varphi$ decay
• Beauty baryon non-leptonic decays into decuplet baryons and $CP$-asymmetries based on $SU(3)$-Flavor analysis
• Measurement of $CP$ asymmetries in ${\Lambda }_b^0\to p{h}^{-}$ decays
• Sizable Time-reversal violating effects in bottom baryon decays
• Final-state rescattering mechanism in bottom-baryon decays
• Determinations of $|V_{cb}|$ and $|V_{ub}|$ from baryonic ${\Lambda }_b$ decays
• Topological $SU(3{)}_f$ approach for two-body ${\Omega }_c$ weak decays
• Mixing effects of $\eta -{\eta }^{\prime }$ in ${\Lambda }_b\to \Lambda {\eta }^{{(}^{\prime })}$ decays
• Measurement of branching fractions and $CP$ asymmetries in ${\Lambda }_b^0({\Xi }_b^0)\to p{K}_{\mathrm{S}}^0{h}^{-}$ decays
• Charmful two-body ${\Omega }_b$ decays in the light-front quark model