Observation of a 2$^{++}$ resonance at 1515 MeV in proton antiproton annihilations into 3$\pi^{0}$

Autor: P. Blüm, U. Meyer-Berkhout, P. Birien, K. Königsmann, R. Beckmann, D. Urner, T. Case, R. P. Haddock, I. Augustin, Pàl Hidas, U. Strohbusch, Claude Amsler, P. Illinger, H. Koch, S. Cierjacks, James A. Bistirlich, B. M. Barnett, C. Pegel, C. A. Meyer, Eberhard Klempt, M. Suffert, C. Zupancic, W. Schott, B. Lewendel, M. A. Faessler, K. Peters, H. Bossy, D. Jamnik, L. Montanet, E. Aker, B. Kämmle, C.J. Batty, R. Bossingham, M. Merkel, K. Dederichs, K. Braune, N. Winter, Mark J. Burchell, D. Walther, D. Engelhardt, C.A. Baker, U. Wiedner, S. Ravndal, A. H. Sanjari, R. Landua, C. Felix, Kenneth M. Crowe, G. Folger, N. P. Hessey, H. Matthaey, H. Kalinowsky, W. Dünnweber, E. Schäfer, Bernhard Schmid, T. Kiel, C. Sutton, J. Zoll, S. M. Walther, F. H. Heinsius, Marcel Kunze
Jazyk: angličtina
Rok vydání: 1991
Předmět:
Popis: Antiproton-proton annihilations at rest into 3 π 0 are analyzed in terms of π 0 π 0 final state interactions. A J PC = 2 + + resonance at a mass of 1515 ± 10 MeV with a width of 120 ± 10 MeV is required to explain the data. This result is supported by previous observations made on the ππ system in p p and p n annihilations which show that the resonance has I = 0. This resonance is practically degenerate in mass with the f′ 2 (1525) but the two resonances have very different production and decay characteristics.
Databáze: OpenAIRE