论文标题
探测CLIC的轻度碰撞中的异常$γγγγ$耦合
Probing anomalous quartic $γγγγ$ couplings in light-by-light collisions at the CLIC
论文作者
论文摘要
检查了CLIC的Compton反向散射光子的偏振光散射中$γγγ$顶点的异常中性耦合。差异和总横截面都是针对$ e^+e^ - $ collision Energies 1500 GEV和3000 GEV计算的。初始电子梁的螺旋度被认为为$ \ pm \，0.8 $。还估计了相同螺旋值的非偏振和SM横截面。 95 \％C.L.计算了两个异常光子耦合$ζ_1$和$ζ_2$的排除限制。这些耦合的最佳界限被认为是$ 6.85 \ times 10^{ - 16} \ mathrm {\ gev}^{ - 4} $和$ 1.43 \ times 10^{ - 15} \ Mathrm {\ gev}^{ - 4} $，分别分别。将结果与先前针对LHC和HL-LHC获得的排除界进行了比较。结果表明，在二极管尤其是偏光层的逐光散射具有更大的潜力，可以搜索$γγγ$顶点的异常四分之一中性耦合。
The anomalous quartic neutral couplings of the $γγγγ$ vertex in a polarized light-by-light scattering of the Compton backscattered photons at the CLIC are examined. Both differential and total cross sections are calculated for $e^+e^-$ collision energies 1500 GeV and 3000 GeV. The helicity of the initial electron beams is taken to be $\pm\,0.8$. The unpolarized and SM cross sections for the same values of helicities are also estimated. The 95\% C.L. exclusion limits on two anomalous photon couplings $ζ_1$ and $ζ_2$ are calculated. The best bounds on these couplings are found to be $6.85 \times 10^{-16} \mathrm{\ GeV}^{-4}$ and $1.43 \times 10^{-15} \mathrm{\ GeV}^{-4}$, respectively. The results are compared with the exclusion bounds obtained previously for the LHC and HL-LHC. It is shown that the light-by-light scattering at the CLIC, especially the polarized, has a greater potential to search for the anomalous quartic neutral couplings of the $γγγγ$ vertex.
