Analysis of the semileptonic decay \Lambda_c->ne^+\nu_e

Abstract

The semileptonic weak decay process of the ${\Lambda }_c$ baryon to the neutron ${\Lambda }_c\to n{e}^{+}{\nu }_e$ is examined. The transition form factors are investigated with light-cone QCD sum rules. The differential decay width is obtained in the dynamical region by fitting the sum rules-allowed results with the dipole formula. The total decay width and the branching ratio are estimated to be $\Gamma ({\Lambda }_c\to n{e}^{+}{\nu }_e)=(8.57\pm 0.41)\times 10^{-15}\text{mbox}GeV$ and $\text{mbox}Br({\Lambda }_c\to n{e}^{+}{\nu }_e)=0.26\pm 0.01\%$, respectively.

Comments: 12 pages,7 figures.Final version