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نویسندگان
چکیده
Motivated by recent anomalies in FCNC $b\to s\ell^+\ell^-$, we study $B_1\to B_2\ell^+\ell^-(\ell=e,\mu,\tau)$ semi-leptonic weak decays with the SU(3) flavor symmetry, where $B_{1,2}$ are spin-1/2 baryons of single bottomed anti-triplet $T_{b3}$, charmed $T_{c3}$ or light baryon octet $T_{8}$. Using irreducible representation approach, first obtain amplitude relations among different decays, and then predict relevant not-yet measured observables these decays. (a) We calculate branching ratios $T_{b3}\to T_8 \mu^+\mu^-$ \tau^+\tau^-$ whole $q^2$ region bins measurement $\Lambda^0_b\to \Lambda^0 \mu^+\mu^-$. Many them obtained for time. In addition, longitudinal polarization fractions leptonic forward-backward asymmetries all T_{8}\ell^+\ell^-$ very similar to each other certain bin due symmetry. (b) analyze upper limits $B(T_{c3}\to T_{8}\ell^+\ell^-)$ using experimental $B(\Lambda^+_c\to p\mu^+\mu^-)$ pe^+e^-)$, find limit giving effective bounds on symmetry parameters. The predictions $B(\Xi^0_c \to \Xi^0e^+e^-)$ \Xi^0\mu^+\mu^-)$ will be between single-quark transition dominant contributions W-exchange ones. (c) As $T_{8}\to T'_8 \ell^+\ell^-$ two measurements $ B(\Xi^0\to e^+e^-)$ B(\Sigma^+\to p\mu^+\mu^-)$, give ratio assuming either
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ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.103.013007