Λc semileptonic decays

Motivated by the recent experimental progress in the Lambda(c) decay that contains a neutron in the final state, we analyze the semileptonic decay Lambda(c) -> nl nu(l) in the framework of QCD sum rules. The transition form factors are analytically computed using three-point correlation functions and the Cutkosky cutting rules, which can be extrapolated into the physical region by employing the z -series parametrization. The branching fractions of Lambda(c) -> ne(+) nu(e) and Lambda(c) -> n mu(+)nu(mu) are estimated to be (0.281 +/- 0.056)% and (0.275 +/- 0.055)%, respectively. Furthermore, we calculate as well the relevant decay asymmetry observables sensitive to new physics beyond the standard model. The numerical results of semileptonic decays Lambda(c) -> Lambda(l)nu(l) are also given and confronted to the latest experimental data.

Automated summary

In this study, the semileptonic decay Lambda(c) -> nl nu(l) is analyzed and the transition form factors and branching fractions are calculated. Additionally, the relevant decay asymmetry observables sensitive to new physics are calculated and compared with experimental data.