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Weak decays of doubly heavy baryons: the FCNC processes
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abstract
The discovery of doubly heavy baryon provides us with a new platform for precisely testing Standard Model and searching for new physics. As a continuation of our previous works, we investigate the FCNC processes of doubly heavy baryons. Light-front approach is adopted to extract the form factors, in which the two spectator quarks are viewed as a diquark. Results for form factors are then used to predict some phenomenological observables, such as the decay width and the forward-backward asymmetry. We find that most of the branching ratios for $b\to s$ processes are $10^{-8}\sim10^{-7}$ and those for $b\to d$ processes are $10^{-9}\sim10^{-8}$. The flavor SU(3) symmetry and symmetry breaking effects are explored. Parametric uncertainties are also investigated.
Forward citations
Cited by 2 Pith papers
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The effects of polarization on the observables in the decay $\Xi_{cc}^{++} \rightarrow \Xi_{c}^{+} \bar{\ell}\nu_{\ell}$
Polarization of the parent baryon, daughter baryon, and muon strongly reshapes branching ratios, forward-backward asymmetries, and newly defined polarization ratios in Ξ_cc++ → Ξ_c+ ℓ ν, while the μ/e LFU ratio stays ...
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Weak decays of singly heavy baryons: the $1/2\to3/2$ case
Form factors and decay widths are computed for 1/2 to 3/2 weak transitions of Omega_c and Omega_b baryons, yielding branching-ratio predictions for semileptonic and nonleptonic modes.
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