Two-Pion Emission Decay of Roper-Like Heavy Baryons

Two-Pion Emission Decay of Roper-Like Heavy Baryons
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绳状重重子的二π介子发射衰变

DOI:
10.1007/s00601-021-01625-0
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发表时间:
2021
期刊:
影响因子:
1.6
通讯作者:
Tanida Kiyoshi
Tanida Kiyoshi
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Arifi Ahmad Jafar;Nagahiro Hideko;Hosaka Atsushi;Tanida Kiyoshi

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近 60 年来,罗珀共振 N(1440) 一直是强子物理学中的一个神秘状态,因为它与传统夸克模型不兼容。近年来,重重子扇区中的候选罗珀态,例如,和,虽然没有直接测量它们的自旋和宇称,但已经在实验中观察到。有趣的是,它们不仅具有相似的激发能,而且还具有衰变特性,这可能为罗珀共振提供一个新的方面。在这项工作中,我们重点研究类罗珀重重子的衰变特性。特别是,我们展示了它们的二介子发射衰变如何有助于确定它们的自旋和宇称。需要实验证实来进一步确定类罗珀态的存在。这种测量主要可以在现有的实验设施中完成,例如 LHC 和 B-factory 实验。
The Roper resonanceN(1440) has been a mysterious state in hadron physics for almost 60 years because of its incompatibility with the conventional quark model. In recent years, the candidates of Roper-like state in heavy baryon sectors, e.g.,and, have been observed in experiments although their spin and parity are not directly measured. Interestingly, they share not only similar excitation energies but also decay properties, that may provide a new aspect of the Roper resonance. In this work, we focus on investigating the decay properties of Roper-like heavy baryons. In particular, we show how their two-pion emission decay can be helpful to determine their spin and parity. The experimental confirmation is required to further establish the existence of the Roper-like states. Such measurements can be principally done in the current experimental facilities such as LHC and B-factory experiments.
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