Model independent study for the anomalous quartic WWγγ couplings at future electron-proton colliders
Model independent study for the anomalous quartic WWγγ couplings at future electron-proton colliders
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DOI：
10.1016/j.nuclphysb.2020.115102
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发表时间：
2018-12
影响因子：
2.8
通讯作者：
V. Ari;E. Gurkanli;A. Billur;M. Koksal
中科院分区：
文献类型：
--
作者：
V. Ari;E. Gurkanli;A. Billur;M. Koksal
摘要大型强子电子对撞机和未来的圆形对撞机--具有高质心能量和高亮度的强子电子，可以更好地理解标准模型，并在电弱领域研究标准模型之外的新物理。多玻色子过程允许测量标准模型的规范玻色子自相互作用，可以用来确定异常规范玻色子耦合。为此，我们在有效场论的框架下，用模型无关的方法研究了质心能量为1.30、1.98TeV的大型强子电子对撞机和质心能量为7.07、10 TeV的未来圆形对撞机强子电子对撞机上的ep-v → ve γ γ j过程，以解释反常的四次W-W γ-γ规范耦合.我们得到了在95%的置信水平上的13个不同的异常耦合所产生的8维算子的灵敏度限制。对于fM2/Λ 4参数，得到了fMi/Λ 4（i= 0，1，2，3，4，5，7）参数的最佳极限;对于fT 5/Λ 4参数，得到了fTi/Λ 4（i= 0，1，2，5，6，7）参数的最佳灵敏度。此外，本研究是首次报道在ep对撞机上用有效拉格朗日量确定的反常四次耦合。
Abstract The Large Hadron Electron Collider and the Future Circular Collider-hadron electron with high center-of-mass energy and luminosity allow to better understand the Standard Model and to examine new physics beyond the Standard Model in the electroweak sector. Multi-boson processes permit for a measurement of the gauge boson self-interactions of the Standard Model that can be used to determine the anomalous gauge boson couplings. For this purpose, we present a study of the process e p→ ν e γ γ j at the Large Hadron Electron Collider with center-of-mass energies of 1.30, 1.98 TeV and at the Future Circular Collider-hadron electron with center-of-mass energies of 7.07, 10 TeV to interpret the anomalous quartic W W γ γ gauge couplings using a model independent way in the framework of effective field theory. We obtain the sensitivity limits at 95% Confidence Level on 13 different anomalous couplings arising from dimension-8 operators. The best limit in f M i/Λ 4 (i= 0, 1, 2, 3, 4, 5, 7) parameters is obtained for f M 2/Λ 4 parameter while the best sensitivity derived on f T i/Λ 4 (i= 0, 1, 2, 5, 6, 7) parameters is obtained for f T 5/Λ 4. In addition, this study is the first report on the anomalous quartic couplings determined by effective Lagrangians at ep colliders.