WZ散射过程中矢量共振的对撞机现象学

R. Delgado, A.Dobado, D.Espriu, C.Garcia-Garcia, M.J.Herrero, X.Marcano, J.J.Sanz-Cillero
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引用次数: 4

摘要

我们通过$WZ$散射过程研究了LHC中矢量共振的产生,并探讨了这些共振对预期未来LHC光度的灵敏度。电弱手性拉格朗日和反振幅法(IAM)用于分析动态产生的矢量共振,其起源将是纵向规范玻色子$W_L$和$Z_L$的(假设强)自相互作用。我们将统一的散射振幅实现到一个单一的模型,即IAM-MC,该模型已经适应了MadGraph 5。它是用电弱手性拉格朗日量和矢量共振的一个额外的有效普鲁卡拉格朗日量来写的,因此它再现了IAM的共振行为,并允许我们在大型强子对撞机上对信号与背景进行现实的研究。我们将重点关注$pp\to WZjj$通道,首先讨论最终$WZ$的强子和半光子通道的潜力,然后更详细地探索最清晰的信号。这些是由规范玻色子的轻子衰变提供的,导致具有$l^+_1l^-_1l^+_2\nu jj$, $l=e,\mu$的最终状态,具有非常独特的特征,并且清楚地显示出我们已经探索过的$1.5$ - $2.5\,{\rm TeV}$范围内与质量共振的出现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Collider phenomenology of vector resonances in WZ scattering processes
We study the production of vector resonances at the LHC via $WZ$ scattering processes and explore the sensitivities to these resonances for the expected future LHC luminosities. The electroweak chiral Lagrangian and the Inverse Amplitude Method (IAM) are used for analyzing a dynamically generated vector resonance, whose origin would be the (hypothetically strong) self interactions of the longitudinal gauge bosons, $W_L$ and $Z_L$. We implement the unitarized scattering amplitudes into a single model, the IAM-MC, that has been adapted to MadGraph~5. It is written in terms of the electroweak chiral Lagrangian and an additional effective Proca Lagrangian for the vector resonances, so that it reproduces the resonant behavior of the IAM and allows us to perform a realistic study of signal versus background at the LHC. We focus on the $pp\to WZjj$ channel, discussing first on the potential of the hadronic and semileptonic channels of the final $WZ$, and next exploring in more detail the clearest signals. These are provided by the leptonic decays of the gauge bosons, leading to a final state with $l^+_1l^-_1l^+_2\nu jj$, $l=e,\mu$, having a very distinctive signature, and showing clearly the emergence of the resonances with masses in the range of $1.5$-$2.5\,{\rm TeV}$, which we have explored.
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