A “composite” scalar–vector system at the LHC

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• 作者：A.E. Cá ; rcamo Herná ; ndez ; R. Torre
• 刊名：Nuclear Physics B
• 出版年：2010
• 出版时间：11 December 2010
• 年：2010
• 卷：841
• 期：1-2
• 页码：188-204
• 全文大小：278 K

文摘

In the framework of a strong dynamics for Electro-Weak Symmetry Breaking (EWSB), both vector and scalar degrees of freedom have been studied in the literature within an effective Lagrangian approach. Here we consider the case in which both a scalar, h, and a vector, V – respectively an iso-singlet and an iso-triplet under a custodial SU(2) – are relevant with a mass below the cut-off Λ248;4πv. We study the amplitudes for the processes W_LW_L→W_LW_L,hh,V_LV_L,V_Lh. Requiring unitarity for the elastic channel W_LW_L→W_LW_L we can reduce the parameter space to two free parameters for given masses of the heavy vector and the scalar. We study the numerical total cross sections for the associated productions pp→Vhjj by Vector Boson Fusion (VBF) and pp→Vh by Drell–Yan (DY) annihilation as functions of these free parameters. The expected rates of same-sign di-lepton and tri-lepton events from the decay of the Vh final state are also given.