Weak Radiative Decays of Anti-triplet Bottomed Baryons in Light-Front Quark Model

Abstract

We study the weak radiative decays of ${\mathbf{B}}_b\to {\mathbf{B}}_n\gamma$ with ${\mathbf{B}}_{b(n)}$ the anti-triplet-bottom (octet) baryons in the light front quark model. We obtain that $\mathcal{B}({\Lambda }_b\to \Lambda \gamma )=(7.1\pm 0.3)\times 10^{-6}$, which agrees well with the current experimental value of $(7.1\pm 1.7)\times 10^{-6}$. We predict that $\mathcal{B}({\Xi }_b^0\to {\Xi }^0\gamma )=(1.0\pm 0.1)\times 10^{-5}$ and $\mathcal{B}({\Xi }_b^{-}\to {\Xi }^{-}\gamma )=(1.1\pm 0.1)\times 10^{-5}$, which are consistent with the latest upper limits set by the LHCb collaboration. In addition, we find that the $SU(3{)}_F$ flavor symmetry breaking effects for the modes related to the $b\to d\gamma$ transition can be as large as $20\%$.

16 pages, 1 figure

References in corpus (26)

• Weak Decays of Doubly Heavy Baryons: SU(3) Analysis
• Rare baryon decays Lambda_b -> Lambda l+ l- (l=e, mu, tau) and Lambda_b -> Lambda gamma : Differential and total rates, lepton- and hadron-side forward-backward asymmetries
• Updating B --> PP, VP decays in the framework of flavor symmetry
• ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ Decay in the Standard Model and with New Physics
• Diquarks and Λ_{b}\toΛ_c weak decays
• Branching fractions of semileptonic $D$ and $D_s$ decays from the covariant light-front quark model
• Topological amplitudes in $D$ decays to two pseudoscalars: a global analysis with linear $SU(3{)}_F$ breaking
• Non-leptonic two-body weak decays of ${\Lambda }_c(2286)$
• Semileptonic decays of anti-triplet charmed baryons
• Precision measurement of the mass and lifetime of the ${\Xi }_b^0$ baryon
• ${\Sigma }_b\to {\Sigma }_c$ and ${\Omega }_b\to {\Omega }_c$ weak decays in the light-front quark model
• Analysis of Charmless Two-body B decays in Factorization Assisted Topological Amplitude Approach
• PQCD Calculation for ${\Lambda }_b\to \Lambda \gamma$ in the Standard Model
• Precision measurement of the mass and lifetime of the Xi_b^- baryon
• Color-allowed Bottom Baryon to Charmed Baryon non-leptonic Decays
• Sum rules for $CP$ asymmetries of charmed baryon decays in the $SU(3{)}_F$ limit
• Measurement of the ${\Lambda }_b^0\to J/\psi \Lambda$ angular distribution and the ${\Lambda }_b^0$ polarisation in $pp$ collisions
• Strong constraints on the $b\to s\gamma$ photon polarisation from $B^0\to K^{\ast 0}{e}^{+}{e}^{-}$ decays
• Light-front zero-mode contribution to the tensor form factors for the exclusive rare $P\to V{\ell }^{+}{\ell }^{-}$ decays
• Semileptonic decays of ${\Lambda }_c^{+}$ in dynamical approaches
• 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
• Rare ${\Lambda }_b\to n{l}^{+}{l}^{-}$ decays in the relativistic quark-diquark picture
• Search for the radiative ${\Xi }_b^{-}\to {\Xi }^{-}\gamma$ decay
• FCNC transitions of ${\Lambda }_b$ to neutron in Bethe-Salpeter equation approach
• Sizable Time-reversal violating effects in bottom baryon decays

Cited by in corpus (8)

• Baryons in the light-front approach: The three-quark picture
• Angular distribution of the FCNC process $B_c\to D_s^{\ast }(\to D_s\pi ){\ell }^{+}{\ell }^{-}$
• Transition form factors and angular distributions of the ${\mathbf{\Lambda }}_{\mathbf{b}}\to \mathbf{\Lambda }(1520)(\to \mathbf{N}\bar{\mathbf{K}}){\mathbf{\ell }}^{+}{\mathbf{\ell }}^{-}$ decay supported by baryon spectroscopy
• Investigating the transition form factors of ${\Lambda }_b\to {\Lambda }_c(2625)$ and ${\Xi }_b\to {\Xi }_c(2815)$ and the corresponding weak decays with support from baryon spectroscopy
• Heavy quark symmetry of ${\Lambda }_b^0$ decays in quark models
• Center of mass motion in bag model
• Rare radiative ${\Xi }_b^{-}\to {\Xi }^{-}\gamma$ decay in the relativistic quark model
• ${\Xi }_b\to \Xi$ form factors from lattice QCD and Standard-Model predictions for ${\Xi }_b\to \Xi {\mu }^{+}{\mu }^{-}$ and ${\Xi }_b\to \Xi \gamma$ decays