分类： 物理学 >> 核物理学 提交时间： 2016-09-12
Liang, Jian and Sun, Wei and Chen, Ying and Qiu, Wei-Feng
and Gong, Ming and Liu, Chuan and Liu, Yu-Bin and Liu,
Zhaofeng and Ma, Jian-Ping and Zhang, Jian-Bo
摘要： The Ω baryons with JP=3/2±,1/2± are studied on the lattice in the quenched approximation. Their mass levels are ordered as M3/2+
分类： 物理学 >> 核物理学 提交时间： 2016-09-09
摘要： In this paper, low-energy scattering of the (D∗D¯∗)± meson system is studied within L\"uscher's finite-size formalism using Nf=2 twisted mass gauge field configurations. With three different pion mass values, the s-wave threshold scattering parameters, namely the scattering length a0 and the effective range r0, are extracted in JP=1+channel. Our results indicate that, in this particular channel, the interaction between the two vector charmed mesons is weakly repulsive in nature hence do not support the possibility of a shallow bound state for the two mesons, at least for the pion mass values being studied. This study provides some useful information on the nature of the newly discovered resonance-like structure Zc(4025) observed in various experiments.
点击量
待评议
点击量
下载量
评论
