论文标题
研究$ \ Mathit C $ - 在3-12 GEV光子对撞机上的机会
Opportunities for studying $\mathit C$-even resonances at 3-12 GeV photon collider
论文作者
论文摘要
最近，已经提出了基于欧洲XFEL现有17.5 GEV LINAC的$γγ$对撞机。高能光子将通过电子在电子上的波长为0.5-1 $ $ m的激光光子的康普顿散射产生。这样的光子对撞机涵盖了不变质量$ w_ {γγ} <12 $ gev。物理计划包括各种$ J^p $ state中的$ \ Mathit C $ - c $ - even共振（$ c $ - ，$ b $ quarkonia，4 Quark State，guareballs）。可变的循环和线性极化将有助于确定量子数。在本文中，我们介绍了在质量区域3-12 GEV中测得和预测的各种共振的两光子宽度的摘要，并研究了在大型多峰值背景的条件下观察这些沉重的两光子共振的实验可能性。假定所有最终粒子的注册。获得$γ_{γγ}（w）$的最低值，在该$可以在一年的运行中以$5σ$的置信度检测到共振。
Recently, a $γγ$ collider based on the existing 17.5 GeV linac of the European XFEL has been proposed. High-energy photons will be generated by Compton scattering of laser photons with a wavelength of 0.5-1 $μ$m on electrons. Such a photon collider covers the range of invariant masses $W_{γγ} <12$ GeV. The physics program includes spectroscopy of $\mathit C$-even resonances ($c$-, $b$-quarkonia, 4-quark states, glueballs) in various $J^P$ states. Variable circular and linear polarizations will help in determining the quantum numbers. In this paper, we present a summary of measured and predicted two-photon widths of various resonances in the mass region 3-12 GeV and investigate the experimental possibility of observing these heavy two-photon resonances under the conditions of a large multi-hadron background. Registration of all final particles is assumed. The minimum values of $Γ_{γγ}(W)$ are obtained at which resonances can be detected at a $5σ$ confidence level in one year of operation.
