Improved K(L) ---> pi+- e-+ nu form factor and phase space integral with reduced model uncertainty
Journal
Physical Review
Journal Volume
D74
Pages
097101
Date Issued
2006-08
Author(s)
Abstract
Using the published KTeV sample of 2×106 KL→π±e ν decays and a new form factor expansion with a rigorous bound on higher order terms, we present a new determination of the KL→π±e ν form factor and phase space integral. Compared to the previous KTeV result, the uncertainty in the new form factor expansion is negligible and results in an overall uncertainty in the phase space integral (IKe) that is a factor of 2 smaller: IKe=0.15392±0.00048. © 2006 The American Physical Society.
Type
journal article