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arXiv 0711.2275hep-ph
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标量介子的有效拉格朗日方法

Scalar mesons from an effective Lagrangian approach

Amir H. Fariborz, Renata Jora, Joseph Schechter

摘要:

对最近人们对轻标量介子的兴趣的简要讨论激发了对广义线性西格玛模型的研究。在SU(3)味不变的模型中,有一个预测,即较轻的标量具有相当大的“四夸克”含量。进一步预测,其中一个单重标量应该是非常轻的。由于标量介子的存在,该模型给出了“控制”的修正,目前的阈值π介子π散射的代数公式。这些corections行动的方向,以提高与目前的实验一致。

英文摘要:

A brief discussion of the recent interest in light scalar mesons motivates the study of a generalized linear sigma model. In an SU(3) flavor invariant version of the model there is a prediction that the the lighter scalars have sizeable "four quark" content. It is further predicted that one of the singlet scalars should be exceptionally light. Due to the presence of scalar mesons, the model gives "controlled" corrections to the current algebra formula for threshold pion pion scattering. These corections act in the direction to improve agreement with current experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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