Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/69371
Título: | Scalar mass dependence of angular variables in $t\bar tφ$ production |
Autor(es): | Azevedo, Duarte Capucha, Rodrigo Onofre, A. Santos, Rui |
Palavras-chave: | Beyond Standard Model CP violation |
Data: | 2020 |
Editora: | Springer |
Revista: | Journal of High Energy Physics |
Citação: | Azevedo, D., Capucha, R., Onofre, A., & Santos, R. (2020). Scalar mass dependence of angular variables in tt¯ ϕ production. [Article]. Journal of High Energy Physics, 2020(6). doi: 10.1007/jhep06(2020)155 |
Resumo(s): | In this paper we explore CP discrimination in the associated production of top-quark pairs ($t\bar{t}$) with a generic scalar boson ($\phi$) at the LHC. We probe the CP-sensitivity of several observables for a varying scalar boson mass and CP-number, either CP-even ($\phi=H$) or CP-odd ($\phi=A$), using dileptonic final states of the $t\bar{t}\phi$ system, with $\phi\rightarrow b\bar{b}$. We show that CP-searches are virtually impossible for $\phi$ boson masses above a few hundred GeV in this channel. A full phenomenological analysis was performed, using Standard Model background and signal events generated with MadGraph5 MC@NLO and reconstructed using a kinematic fit. The most sensitive CP-observables are used to compute Confidence Levels (CLs), as a function of luminosity, for the exclusion of different signal hypotheses with scalar and pseudoscalar boson masses that range from $m_\phi$ = 40 GeV up to 200 GeV. We finalize by analysing the impact of a measurement (or limit) of the CP-violating angle in the parameter space of a complex two-Higgs doublet model known as the C2HDM. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/69371 |
DOI: | 10.1007/JHEP06(2020)155 |
ISSN: | 1126-6708 |
e-ISSN: | 1029-8479 |
Versão da editora: | https://link.springer.com/article/10.1007%2FJHEP06%282020%29155 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Azevedo2020_Article_ScalarMassDependenceOfAngularV.pdf | 3,43 MB | Adobe PDF | Ver/Abrir |