Dalitz plot density analysis in Kμ3+ decay

D. Haidt, H. Schepers, J. Stein, H.J. Steiner, S. Natali, G. Piscitelli,Francesco Romano, E. Fett, J. Lemonne, R. Møllerud, T.I. Pedersen, S.N. Tovey, V. Brisson, L. Kluberg, P. Petiau, C. D. Esveld, J. Timmermans,R. T. Van de Walle, B. Aubert, L.M. Chounet,Dong Lê, F. Bobisut, E. Calimani, S. Ciampolillo, H. Huzita, D. Gamba, A. Marzari-Chiesa, A. E. Werbrouck

Physics Letters B（1969）

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摘要

Abstract A sample of K + mesons stopped in the CERN 1.1 m 3 heavy-liquid bubble chamber has been used to study the K μ3 + Dalitz plot density and hence to examine the four-mementum dependence of the form factors ƒ + (q 2 ) and ξ = ƒ − (q 2 ) ƒ + (q 2 ) . The result of a three-parameter fit is: λ + = 0.053 −0.021 +0.026 , ξ (0) = −0.4 −1.5 +1.6 , ξ (6.8 m π 2 ) = −0.80 ± 0.50. The variation of the optimum value for ξ with λ + is described.

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