在LHeC上用极化$e$ -光束搜索异常$WWγ$和$WWZ$耦合
Search for anomalous $WWγ$ and $WWZ$ couplings with polarized $e$-beam at the LHeC
摘要：
我们研究的潜力的$ep\toν_{e}qγX$和$ep\toν_{e}qZX$过程中寻找的异常耦合的$WWγ$和$WWZ$顶点在LHeC与电子束能量的$E_{e}=60$ GeV和$E_{e}=140$ GeV。在电子束能量为GeV，积分亮度为$L_{int}=100$ fb $^{-1}$，无电子束极化的情况下，得到了反常耦合的最大和最小边界差（$δΔκ_γ$，$δλ_γ$）和（$δΔκ_{Z}$，$δλ_{Z}$）分别为（$E_{e}=140$，$0.122$）和（$0.362$，$0.012$）.由于$e-$光束偏振的可能性，我们分别得到了（$δΔκ_γ, δλ_γ$）和（$δΔκ_{Z}, δλ_{Z}$）的（$0.975$，$0.118$）和（$0.285$，$0.009$）的更好的结果。结果被认为是与目前的实验极限从两个参数的分析在轻子和强子对撞机。发现通过LHeC上的过程$ep\toν_{e}qZX$对反常耦合（$Δκ_{Z}$，$λ_{Z}$）的限制可以进一步改善当前的实验限制。
英文摘要：
We examine the potential of the $ep\toν_{e}qγX$ and $ep\toν_{e}qZX$ processes to search for the anomalous couplings of $WWγ$ and $WWZ$ vertices at the LHeC with the electron beam energy of $E_{e}=60$ GeV and $E_{e}=140$ GeV. The difference of maximum and minimum bounds on the anomalous couplings, ($δΔκ_γ$, $δλ_γ$) and ($δΔκ_{Z}$, $δλ_{Z}$) are obtained as ($0.990$, $0.122$) and ($0.362$, $0.012$) without electron beam polarization at the beam energy of $E_{e}=140$ GeV for an integrated luminosity of $L_{int}=100$ fb$^{-1}$, respectively. With the possibility of $e-$beam polarization, we obtain more improved results as ($0.975$, $0.118$) and ($0.285$, $0.009$) for ($δΔκ_γ, δλ_γ$) and ($δΔκ_{Z}, δλ_{Z}$), respectively. The results are found to be comparable with the current experimental limits obtained from two-parameter analysis at the lepton and hadron colliders. It is found that the limits on the anomalous couplings ($Δκ_{Z}$, $λ_{Z}$) through the process $ep\toν_{e}qZX$ at the LHeC can further improve the current experimental limits.
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