Study of the process (p)over-bar-p→ηηπ0 from 1350 to 1940 MeV/c

被引：24

作者：

Anisovich, AV

Baker, CA

Batty, CJ

Bugg, DV ^{[1
]}

Haddock, RP

Hodd, C

Nikonov, VA

Pinder, CN

Sarantsev, AV

Sarantsev, VV

Scott, I

Zou, BS

机构：

[1] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[2] Queen Mary Univ London, London E1 4NS, England

[3] Univ Calif Los Angeles, Los Angeles, CA 90024 USA

[4] PNPI, Gatchina 188350, St Petersburg D, Russia

来源：

PHYSICS LETTERS B | 1999年 / 449卷 / 1-2期

关键词：

mesons; resonances; annihilation;

D O I：

10.1016/S0370-2693(99)00077-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Data on the final state eta eta pi(0) are presented for beam momenta of 1350, 1525, 1642, 1800 and 1940 MeV/c. There is evidence for the presence of a broad high mass 2(+) contribution in eta-eta; the amplitude analysis fits it as a resonance with mass M = 1980 +/- 50 MeV and width Gamma = 500 +/- 100 MeV. It has the curious feature that it is produced dominantly with orbital angular momentum L = 1 in the final state and with component of spin +/- 1 along the beam direction. It contributes typically similar to 15-20% of the integrated cross section. In addition, the presence of a(2)(1660) is confirmed at all beam momenta. Also f(0)(2100) --> eta-eta is confirmed. (C) 1999 Published by Elsevier Science B.V, All rights reserved.

引用

页码：145 / 153

页数：9