Heavy-Flavor-Conserving Hadronic Weak Decays of Charmed and Bottom Baryons: an Update

Abstract

This paper serves as an update of the previous work entitled ``Heavy-Flavor-Conserving Hadronic Weak Decays of Charmed and Bottom Baryons". We make an improvement on the bag wave functions by removing the center-of-mass motion of the bag. All the baryon matrix elements are now calculated under the same framework without introducing new parameters. The matrix elements of 4-quark operators are found to be nearly twice larger than the previous ones. The calculated branching fractions of $\hat{I}{ž}_c^0\to \hat{I}{›}_c^{+}\ddot{I}{€}^{-}$ and $\hat{I}{ž}_b^{-}\to \hat{I}{›}_b^0\ddot{I}{€}^{-}$ are both in agreement with current experimental results. For the yet-to-be-measured heavy-flavor-conserving decays, we find $\mathcal{B}(\hat{I}{ž}_c^{+}\to \hat{I}{›}_c^{+}\ddot{I}{€}^0)=(13.8\pm 1.4)\times 10^{-3}$, $\mathcal{B}(\hat{I}{ž}_b^0\to \hat{I}{›}_b^0\ddot{I}{€}^0)=(2.6\pm 0.3)\times 10^{-3}$, $\mathcal{B}(\hat{I}{\text{c◯}}_c^0\to \hat{I}{ž}_c^{+}\ddot{I}{€}^{-})=(2.0\pm 0.2)\times 10^{-3}$ and $\mathcal{B}(\hat{I}{\text{c◯}}_c^0\to \hat{I}{ž}_c^0\ddot{I}{€}^0)=(1.1\pm 0.1)\times 10^{-3}$. They are all accessible to LHCb, Belle and Belle II and can be tested in the near future.

25 pages