A study of the D-wave in the K/sup +/K/sup -/ system of the reaction pi /sup -/p to K/sup +/K/sup -/n at 18 GeV

The reaction pi /sup -/p to K/sup +/K/sup -/n has been studied on a hydrogen target (27000 events) at 18.4 GeV and on a butanol target (54000 events) at 17.2 GeV. The authors study the D wave fitting the superposition of f(1270+A/sub 2/(1310)+f'(1515) resonances to the t /sub 0//sup 4/ moment....

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Detalles Bibliográficos
Autores principales: Chabaud, V, Becker, H, Blanar, G J, Blum, W, De Groot, J, Dietl, H, Gallivan, J, Gottschalk, B, Hyams, Bernard David, Lorenz, E, Lütjens, G, Lutz, Gerhard, Männer, W, Niczyporuk, B, Notz, D, Papadopoulou, T D, Richter, R, Rózanska, M, Rybicki, K, Stierlin, U, Stringfellow, B C
Lenguaje:eng
Publicado: 1981
Materias:
Particle Physics - Phenomenology
Acceso en línea:http://cds.cern.ch/record/878258
Descripción
Sumario:The reaction pi /sup -/p to K/sup +/K/sup -/n has been studied on a hydrogen target (27000 events) at 18.4 GeV and on a butanol target (54000 events) at 17.2 GeV. The authors study the D wave fitting the superposition of f(1270+A/sub 2/(1310)+f'(1515) resonances to the t /sub 0//sup 4/ moment. This fit gives very high chi /sup 2//ND=60/22 for each sample if the parameters of f'(1515) are fixed at their table values. If these parameters are left free they obtain m/sub f'/=(1503 /sub -7//sup +6/) MeV, Gamma /sub f'/=(144/sub -17//sup +19/) MeV, and BR(f' to pi pi /f' to all)=(3.0+or-1.0)%. Fixing the parameters of f' (1515) to their table values they obtain a good fit after the introduction of a fourth tensor meson with m=(1422+or-9) MeV and Gamma =(80+or-42) MeV. Such an object does not easily fit into the quark- antiquark scheme. (19 refs).

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