A study of the semi-leptonic decays of K+ mesons

Authors :: D. Bertrand
F. Romano
M. Cornelssen
S. Natali
D.C. Cundy
T.I. Pedersen
O. Erriquez
Pierre Vilain
M. Csejthey-Barth
Jacques Lemonne
P. B. Renton
H.U. Martyn
D. Waldren
H. Braun
Source :: Nuclear physics. B, 89
Publication Year :: 1975
Publisher :: Elsevier BV, 1975.
Abstract: The form factors of the semi-leptonic decays K+→π0e+ν and K+→π0μ+ν have been investigated using a sample of events detected in the CERN 1.1 m3 heavy liquid bubble chamber. Analyses have been carried out using methods independent of any assumption of the q2 dependence of the form factors in addition to the usual linear parametrizations. Consistent results have been obtained from separate studies of both Dalitz plot density distributions and the branching ratio. A parametrized global analysis of both decay modes gives the values ξ(0) = -1.3 ± 0.7 and ξ(4.4 Mπ2) = -0.45 ± 0.13, or λ0 = - 0.017 ± 0.011 both for a fitted value of λ+ = 0.025 ± 0.007. © 1975.<br />0<br />SCOPUS: ar.j<br />info:eu-repo/semantics/published