Width of a two-body coupled-channel resonance

被引：9
作者：
Garcilazo, H. [1 ]
Valcarce, A. [2 ,3 ]
机构：
[1] Inst Politecn Nacl, Escuela Super Fis & Matemat, Edificio 9, Mexico City 07738, DF, Mexico
[2] Univ Salamanca, Dept Fis Fundamental, E-37008 Salamanca, Spain
[3] Univ Salamanca, IUFFyM, E-37008 Salamanca, Spain
来源：
EUROPEAN PHYSICAL JOURNAL C | 2018年 / 78卷 / 03期
关键词：
MODEL;
D O I：
10.1140/epjc/s10052-018-5747-7
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We study the width of a two-body resonance in a coupled-channel system. We demonstrate how the width does not come only determined by the available phase space for its decay to the detection channel, but it greatly depends on the relative position of the mass of the resonance with respect to the masses of the coupled-channels generating the state. Our results are consistent with the experimental observation of narrow hadrons lying well above their lowest decay threshold.
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页数：5
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