Model-independent framework for searches of top partners

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• 作者：Mathieu Buchkremer ; Giacomo Cacciapaglia ; Aldo De ; rea ; Luca Panizzi
• 刊名：Nuclear Physics B
• 出版年：2013
• 出版时间：11 November, 2013
• 年：2013
• 卷：876
• 期：2
• 页码：376-417
• 全文大小：465 K

文摘

We propose a model-independent and general framework to study the LHC phenomenology of top partners, i.e. vector-like quarks including particles with different electromagnetic charge. We consider vector-like quarks embedded in general representations of the weak , coupling to all Standard Model quarks via Yukawa mixing focusing on the case of a single multiplet. We show that, with very minimal and quite general assumptions, top partners may be studied in terms of few parameters in an effective Lagrangian description with a clear and simple connection with experimental observables. We also demonstrate that the parametrisation can be applied as well to cases with many vector-like multiplets, thus covering most realistic models of New Physics. We perform a numerical study to understand the conclusions which can be drawn within such a description and the expected potential for discovery or exclusion at the LHC. Our main results are a clear connection between branching ratios and single production channels, and the identification of novel interesting channels to be studied at the LHC.