OBSERVATION OF A 2++ RESONANCE AT 1515 MEV IN PROTON - ANTIPROTON ANNIHILATIONS INTO 3-PI-0

被引：95

作者：

AKER, E

机构：

[1] Universität Zürich

[2] Universität Karlsruhe

[3] Rutherford Appleton Laboratory, Chilton, Didcot

[4] Universität Hamburg

[5] Lawrence Berkeley Laboratory, University of California, Berkeley

[6] Universität München

[7] CERN

[8] Institut für Material und Festkörperforschung, Kernforschungszentrum Karlsruhe

[9] University of California, Los Angeles

[10] Universität Mainz

[11] Queen Mary and Westfield College, London

[12] Centre de Recherches Nucléaires

来源：

PHYSICS LETTERS B | 1991年 / 260卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(91)90999-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Antiproton-proton annihilations at rest into 3-pi-0 are analyzed in terms of pi-0-pi-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 pi-pi system in pBARp and pBARn 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.

引用

页码：249 / 258

页数：10

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