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arXiv 0708.3256hep-ph
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ρ矢量介子的宽度差

The width difference of rho vector mesons

F. V. Flores-Baez, G. Lopez Castro, G. Toledo Sanchez

摘要:

本文计算了荷电和中性ρ(770)矢量介子衰变宽度的差别。考虑了中性和带电π、ρ介子质量差引起的同位旋破缺、ρ-> ππ的辐射修正以及ρ-> ππγ衰变。发现宽度差ΔΓ_ρ对$ρ$介子质量Δm_ρ的同位旋破缺非常敏感。这一结果可以用于测试从实验数据中提取的这些参数的值之间观察到的相关性。

英文摘要:

We compute the difference in decay widths of charged and neutral ρ(770) vector mesons. The isospin breaking arising from mass differences of neutral and charged πand ρmesons, radiative corrections to ρ-> ππ, and the ρ-> ππγdecays are taken into account. It is found that the width difference ΔΓ_rho is very sensitive ot the isospin breaking in the $ρ$ meson mass Δm_ρ. This result can be useful to test the correlations observed between the values of these parameters extracted from experimental data.

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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