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arXiv 1606.04433hep-ph
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光子-光子碰撞中反常四次$ZZγγ$耦合的研究

Search for anomalous quartic $ZZγγ$ couplings in photon-photon collisions

M. Köksal, V. Arı, A. Senol

备注：
20 pages, 7 figures, 2 Tables, published version
发表信息：
Adv.High Energy Phys. 2016 (2016) 8672391
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摘要：

电弱规范玻色子的自耦合完全由标准模型（SM）的非阿贝尔规范性质所规定。这些耦合的直接研究提供了一个重要的机会，以测试SM的有效性和存在的新的物理超越SM的高能量标度。为此，我们研究了$γγ\rightarrow ZZ$，$e^{-}γ\rightarrow e^{-}γ^{*}γ\rightarrow e^{-}Z\, Z$和$e^{+}e^{-} \rightarrow e^{+}γ^{*} γ^{*} e^{-} \rightarrow e^{+}\, Z\, Z\, e^{-}$过程的势能，以考察在紧凑型直线对撞机（CLIC）上质心能量为$3$ TeV的$ZZγγ$顶点的反常四次耦合。我们计算$95\%$置信水平的灵敏度的尺寸-8参数与各种值的综合光度。在质心能量为3 TeV时，$γγ\rightarrow ZZ$过程引起的$\frac{f_{M2}}{Λ^{4}}$，$\frac{f_{M3}}{Λ^{4}}$，$\frac{f_{T0}}{Λ^4}$和$\frac{f_{T9}}{Λ^4}$反常耦合的最佳边界分别为$[-3.30;3.30]\times 10 ^{-3}$ TeVPDMATHABMZ，$[-1.20;1.20]\times 10 ^{-2}$ TeVPDMATHABMZ，$[-3.40;3.40]\times 10 ^{-3}$ TeVPDMATHABMZ和$[-1.80;1.80]\times 10 ^{-3}$ TeVPDMATHABMZ.

英文摘要：

The self-couplings of the electroweak gauge bosons are completely specified by the non-Abelian gauge nature of the Standard Model (SM). The direct study of these couplings provides a significant opportunity to test the validity of the SM and the existence of new physics beyond the SM up to the high energy scale. For this reason, we investigate the potential of the processes $γγ\rightarrow ZZ$, $e^{-}γ\rightarrow e^{-}γ^{*}γ\rightarrow e^{-}Z\, Z$ and $e^{+}e^{-} \rightarrow e^{+}γ^{*} γ^{*} e^{-} \rightarrow e^{+}\, Z\, Z\, e^{-}$ to examine the anomalous quartic couplings of $ZZγγ$ vertex at the Compact Linear Collider (CLIC) with center-of-mass energy $3$ TeV. We calculate $95\%$ confidence level sensitivities on the dimension-8 parameters with various values of the integrated luminosity. We show that the best bounds on the anomalous $\frac{f_{M2}}{Λ^{4}}$, $\frac{f_{M3}}{Λ^{4}}$, $\frac{f_{T0}}{Λ^4}$ and $\frac{f_{T9}}{Λ^4}$ couplings arise from $γγ\rightarrow ZZ$ process among those three processes at center-of-mass energy of 3 TeV and integrated luminosity of $L_{int}=2000$ fb$^{-1}$ are found to be $[-3.30;3.30]\times 10 ^{-3}$ TeV$^{-4}$, $[-1.20;1.20]\times 10 ^{-2}$ TeV$^{-4}$, $[-3.40;3.40]\times 10 ^{-3}$ TeV$^{-4}$ and $[-1.80;1.80]\times 10 ^{-3}$ TeV$^{-4}$, respectively.

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