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

TL;DR

This paper investigates the semileptonic decay of the Lambda_c baryon to a neutron and positron-neutrino pair using light-cone QCD sum rules, providing estimates for decay width and branching ratio.

Contribution

It applies light-cone QCD sum rules to analyze the transition form factors and decay properties of Lambda_c to neutron semileptonic decay for the first time.

Findings

Decay width estimated as (8.57±0.41)×10^{-15} GeV

Branching ratio estimated as 0.26±0.01%

Differential decay width fitted with dipole formula

Abstract

The semileptonic weak decay process of the $\Lambda_c$ baryon to the neutron $\Lambda_c\rightarrow ne^+\nu_e$ 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 $\Gamma(\Lambda_c\rightarrow ne^+\nu_e)=(8.57\pm0.41)\times10^{-15}\,\mbox{GeV}$ and $\mbox{Br}(\Lambda_c\rightarrow ne^+\nu_e)=0.26\pm0.01\%$, respectively.