Phys. Rev. D 74, 097101 (2006) [3 pages]Improved KL→π±e∓ν form factor and phase space integral with reduced model uncertaintyReceived 27 August 2006; published 20 November 2006 Using the published KTeV sample of 2×106 KL→π±e∓ν decays [1] and a new form factor expansion with a rigorous bound on higher order terms [2], we present a new determination of the KL→π±e∓ν form factor and phase space integral. Compared to the previous KTeV result [1], 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 URL:
http://link.aps.org/doi/10.1103/PhysRevD.74.097101
DOI:
10.1103/PhysRevD.74.097101
PACS:
13.25.Es, 14.40.Aq
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