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arXiv 1709.02853nucl-exnucl-th
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从空间和类时数据得到的K介子横向电荷密度

Kaon transverse charge density from space- and timelike data

N. A. Mecholsky, J. Meija-Ott, M. Carmignotto, T. Horn, G. A. Miller, I. L. Pegg

摘要:

我们使用世界上的数据上的K介子形状因子提取横向K介子电荷密度使用的类时区域的K介子形状因子的虚部的色散积分。我们的分析包括最近的数据从$e^+e^-$ annihilization测量扩展到该地区的高动量转移共轭区域的短横向距离的数据的运动学范围。为了计算横向密度,我们创建了一个类时和类空数据的超集,并开发了一个经验参数化的K介子形状因子。类空集包括我们从现有的截面数据中提取的两个新的数据点。我们估计,在$b$ =0.025 fm时,所得横向密度的不确定性为5%,并且在大距离时明显更好。新的K介子数据计划与12 GeV的杰斐逊实验室可能有一个显着的影响,在距离$b<$ 0.1 fm的电荷密度。

英文摘要:

We used the world data on the kaon form factor to extract the transverse kaon charge density using a dispersion integral of the imaginary part of the kaon form factor in the timelike region. Our analysis includes recent data from $e^+e^-$ annihiliation measurements extending the kinematic reach of the data into the region of high momentum transfers conjugate to the region of short transverse distances. To calculate the transverse density we created a superset of both timelike and spacelike data and developed an empirical parameterization of the kaon form factor. The spacelike set includes two new data points we extracted from existing cross section data. We estimate the uncertainty on the resulting transverse density to be 5\% at $b$=0.025 fm and significantly better at large distances. New kaon data planned with the 12 GeV Jefferson Lab may have a significant impact on the charge density at distances of $b<$ 0.1fm.

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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