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arXiv 2005.09293hep-phhep-ex
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电子-离子对撞机上质子的光生$Υ$

$Υ$ photo-production on the proton at the Electron-Ion Collider

Oleksii Gryniuk, Sylvester Joosten, Zein-Eddine Meziani, Marc Vanderhaeghen

摘要:

我们提出了一个色散分析的目的是从$γp \to Υp$实验中提取$Υ$ -p散射长度。在这个框架中,$Υ$ -p前向散射振幅的虚部是从$γp \to Υp$截面测量中获得的,并且在现有HERA和LHC数据的高能量下受到约束。其实部通过一次相减色散关系计算,相减常数与$Υ$ -p散射长度成正比。我们在电子-离子对撞机上进行了$Υ$光生实验的可行性研究,并讨论了在提取$Υ$ -p散射长度时可以达到的灵敏度和精度。

英文摘要:

We present a dispersive analysis with the aim to extract the $Υ$-p scattering length from $γp \to Υp$ experiments. In this framework, the imaginary part of the $Υ$-p forward scattering amplitude is obtained from $γp \to Υp$ cross section measurements, and is constrained at high energies from existing HERA and LHC data. Its real part is calculated through a once-subtracted dispersion relation, and the subtraction constant is proportional to the $Υ$-p scattering length. We perform a feasibility study for $Υ$ photo-production experiments at an Electron-Ion Collider and discuss the sensitivity and precision that can be reached in the extraction of the $Υ$-p scattering length.

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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