Evidence for a narrow width boson of mass 2.95 GeV

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In a search for resonances coupled to the pp pi /sup -/ system, pi /sup -/p interactions at 16 GeV/c giving a forward antiproton have been studied, using the Omega spectrometer at CERN. In the final states involving a p, p and pi /sup -/ a 5.6 (6.3) standard deviation enhancement is observed in the...

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Detalles Bibliográficos
Autores principales: Evangelista, C, Armstrong, T, Best, C, Costa, G, Donald, R A, Edwards, D N, Edwards, M, French, Bernard R, Ghidini, B, Gordon, J, Houlden, M A, Hughes, I S, Lambacher, H D, Lewis, G M, Mandelli, L, Mättig, P, Miller, D H, Mitaroff, W A, Müller, K, Palano, A, Palazzi-Cerrina, C, Paul, E, Pensotti, S, Perini, L, Picciarelli, V, Rühmer, W, Strub, R, Thompson, A S, Turnbull, R M, Woodworth, P L, Zito, G
Lenguaje:eng
Publicado: 1977
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(77)90081-8
http://cds.cern.ch/record/878494
Descripción
Sumario:In a search for resonances coupled to the pp pi /sup -/ system, pi /sup -/p interactions at 16 GeV/c giving a forward antiproton have been studied, using the Omega spectrometer at CERN. In the final states involving a p, p and pi /sup -/ a 5.6 (6.3) standard deviation enhancement is observed in the pp pi /sup -/ mass spectrum at (2.95+or-0.01) GeV with a width consistent with the resolution ( sigma =15 MeV). The production cross section*branching ratio is estimated to be of the order 1 mu b. The data are consistent with a resonance decaying partly via intermediate pp final states. (5 refs).

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