Speaker
Description
We present updated predictions for the lifetimes of doubly heavy baryons, incorporating newly computed $\alpha_s$ corrections within the heavy quark expansion. While both the operator product expansion and the perturbative $\alpha_s$ series exhibit good convergence in the $b$-quark sector, we discuss potential issues related to their convergence in charm decays. Numerical predictions are provided for doubly bottom baryons ($\Xi_{bb}^0$, $\Xi_{bb}^-$, $\Omega_{bb}^-$), doubly charm baryons ($\Xi_{cc}^{++},\,\Xi_{cc}^+,\,\Omega_{cc}^+$), and $bc$ baryons ($\Xi_{bc}^+$, $\Xi_{bc}^0$, $\Omega_{bc}^0$). In particular, future measurements of $bc$ baryon lifetimes may offer valuable insight into their internal spin structure; accordingly, we present results for the two possible spin configurations.
| Discipline | Theory |
|---|---|
| Topic | Heavy Quark Decays |