Veneziano formula, KA meson decays, and Weinberg limits of Kl4 form factors

Biswas, S. N. ; Datta, K. ; Panchapakesan, N. ; Varma, V. S. (1971) Veneziano formula, KA meson decays, and Weinberg limits of Kl4 form factors Physical Review D, 3 (3). pp. 729-732. ISSN 0556-2821

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Official URL: http://prd.aps.org/abstract/PRD/v3/i3/p729_1

Related URL: http://dx.doi.org/10.1103/PhysRevD.3.729

Abstract

s- and d-wave ratios of gKAKρ and gKAKπ couplings have been determined using Veneziano representations for KAπ→Kπ amplitudes. The results are in agreement with those obtained by the hard-meson techniques of current algebra. Assuming that the axial-vector current is dominated by KA- and K-meson poles only, we obtain the Kl4 form factors from Kπ→KAπ and Kπ→Kπ scattering amplitudes when the KA and one of the K mesons are taken off shell. Current-algebra constraints due to Weinberg, when both pions are soft, are then used to fix the arbitrary parameters of the theory. We find that consistency of our results with current-algebra predictions requires the presence of nonleading Veneziano amplitudes.

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ID Code:26296
Deposited On:06 Dec 2010 18:16
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