A meson-theoretical explanation of the f0 (980)-production puzzle in the reaction π−p → π0π0n

被引：0
|
作者：
Z. S. Wang
S. Krewald
J. Speth
机构：
[1] Forschungszentrum Jülich GmbH,Institut für Kernphysik
来源：
Physics of Atomic Nuclei | 2001年 / 64卷
关键词：
Elementary Particle; Momentum Transfer; Small Momentum; Experimental Collaboration; Small Momentum Transfer;
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学科分类号：
摘要：
A meson-theoretical model for the reaction π−p → π0π0n for large π− momenta is developed which treats the final-state interaction between the two produced pions microscopically. For small momentum transfers, the squares of the S-wave amplitudes of the produced two-pion system show a dip for invariant twopion masses in the vicinity of the f0(980) meson, while for momentum transfers −t>0.2(GeV/c)2, the f0(980) meson appears as a bump. The model provides a microscopic explanation of the long-standing puzzle seen by both the GAMS and the BNL experimental collaborations.
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页码：691 / 697
页数：6
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