arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1808.09461nucl-thhep-lathep-phnucl-ex
收藏

赝标介子弹性形状因子的质量依赖性

Mass-dependence of pseudoscalar meson elastic form factors

Muyang Chen, Minghui Ding, Lei Chang, Craig D. Roberts

摘要:

用夸克-反夸克束缚态的连续介质方法,在扩展到$^2$ $Q^2 \lesssim 10\,$ GeV的类空区域上,确定了质量为$m_{0^-}/{\rm GeV}=0.14$,$0.47$,$0.69$,$0.83$的类π介子的电磁形状因子.结果使直接比较与当代晶格QCD计算的重π形状因子在大的动量转移值,并帮助理解他们。他们还透露,除其他外,物理π介子的形状因子提供了最好的机会,验证的因式硬散射公式有关这类排他性的过程,这种能力稳步减少介子质量的增加。

英文摘要:

A continuum approach to quark-antiquark bound-states is used to determine the electromagnetic form factors of pion-like mesons with masses $m_{0^-}/{\rm GeV}=0.14$, $0.47$, $0.69$, $0.83$ on a spacelike domain that extends to $Q^2 \lesssim 10\,$GeV$^2$. The results enable direct comparisons with contemporary lattice-QCD calculations of heavy-pion form factors at large values of momentum transfer and aid in understanding them. They also reveal, inter alia, that the form factor of the physical pion provides the best opportunity for verification of the factorised hard-scattering formula relevant to this class of exclusive processes and that this capacity diminishes steadily as the meson mass increases.

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。

↑