Search for non-strange exotic mesons produced via baryon exchange

Negative results on backward production via baryon exchange, of exotic non-strange mesons are presented. The reactions pi /sup -/p to p/sub forward/X/sup -/ and pi /sup -/n to p/sub forward/X/sup --/ have been studied with a 12 GeV/c pi /sup -/ beam in the Omega spectrometer at CERN. No resonant pea...

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Detalles Bibliográficos
Autores principales: Boucrot, J, Benkheiri, P, Bouquet, B, D'Almagne, B, De Rosny, G, Ferrer, A, Jacholkowski, A, Lahellec, A, Navach, F, Petroff, P, Rivet, P, Roudeau, P, Rougé, A, Salmeron, Roberto Aureliano, Six, J, Sonderegger, P, Treille, D, Volte, A, Wuthrick, J P, Yoshida, H
Lenguaje:eng
Publicado: 1977
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0550-3213(77)90437-0
http://cds.cern.ch/record/878629
Descripción
Sumario:Negative results on backward production via baryon exchange, of exotic non-strange mesons are presented. The reactions pi /sup -/p to p/sub forward/X/sup -/ and pi /sup -/n to p/sub forward/X/sup --/ have been studied with a 12 GeV/c pi /sup -/ beam in the Omega spectrometer at CERN. No resonant peak in X to pp pi /sup -/, pp pi /sup -/ pi /sup - /, pp pi /sup -/ pi /sup 0/, pi /sup +/ pi /sup -/ pi /sup -/ pi /sup -/, pi /sup +/ pi /sup -/ pi /sup -/ pi /sup 0/ has been seen. The upper limits obtained on cross sections for exotic meson production X to NN pi , NN pi pi , 4 pi are lower than the rho /sup -/ backward production cross section in the pi /sup -/p to p rho /sup -/ reaction; this result seems to contradict the predictions of the two-component duality model. Compared with already published experiments in the search for exotics produced via baryon exchange, the sensitivity of this experiment is higher by an order of magnitude. (20 refs).

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