AMPLITUDE ANALYSIS OF DATA ON (P)OVER-BAR-P-]PI-PI AT LOW-ENERGY

被引：18

作者：

OAKDEN, MN ^{[1
]}

PENNINGTON, MR ^{[1
]}

机构：

[1] UNIV DURHAM,CTR PARTICLE THEORY,DURHAM DH1 3LE,ENGLAND

来源：

NUCLEAR PHYSICS A | 1994年 / 574卷 / 04期

关键词：

D O I：

10.1016/0375-9474(94)90957-1

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The first amplitude analysis of data on ppBAR --> pi-pi+ from the PS172 experiment at CERN's LEAR facility is performed to discover the resonant content of the NNBAR --> pipi channel in the range 0.36 less-than-or-equal-to P(lab) less-than-or-equal-to 1.55 GeV/c. Simultaneously fitting existing data on ppBAR --> pi0pi0, we find just two solutions having acceptable threshold behaviour and continuity in energy. Resonant structures in these solutions are studied using self-consistency to fix the arbitrary overall phase of the amplitudes. Both solutions exhibit a rich spectrum of resonances with spins from 0 to 4. This includes at least one state, with J(PC) = 0++, whose coupling to NNBAR is much larger than would be expected for a simple qqBAR state.

引用

页码：731 / 754

页数：24

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