Form Factor Ratio Measurement in $Λ_{c}^{+} \to Λ e^{+} ν_{e}$

Publisher Website

24 July 1995

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 75 (4) , 624-628
https://doi.org/10.1103/physrevlett.75.624

Abstract

The angular distributions of the decay

Λ_{c}^{+} \to Λ e^{+} ν_{e}

have been studied using the CLEO II detector. By performing a three-dimensional maximum likelihood fit, the form factor ratio

{R = f}_{2} {/ f}_{1}

is determined to be

- 0.25 \pm 0.14 \pm 0.08

. The decay asymmetry parameter of the

Λ_{c}

averaged over

q^{2}

is calculated to be

α_{Λ_{c}} {= - 0.82}_{- 0.06 - 0.03}^{+ 0.09 + 0.06}

.

Keywords

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