a(4)(2010) meson decaying into eta pi(0)

被引：0
|
作者：
Prokoshkin, YD
Sadovsky, SA
Sobol, AE
机构：
来源：
PHYSICS OF ATOMIC NUCLEI | 1996年 / 59卷 / 08期
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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：
A mass-independent partial-wave analysis of the reaction pi(-)p --> eta pi(0)n is performed in the eta pi(0) mass range above 1.6 GeV with S, P, D, F, and G waves. Experimental data has been collected with the GAMS-2000 multiphoton spectrometer in a 38-GeV/c pion beam from the 70-GeV MEP accelerator. A resonance with quantum numbers J(PC) = 4(++) and I-G = 1(-) is observed in the G wave. Its mass and width are measured to be M = 2010 +/- 20 MeV and Gamma = 370 +/- 80 MeV. The mechanism that governs the production of the observed a(4)(0) meson is dominated by the natural-spin-parity t-channel exchange. The measured unnatural-to-natural cross-section ratio is 0.60 +/- 0.16.
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页码：1333 / 1335
页数：3
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