Advancing LHC probes of dark matter from the inert two-Higgs-doublet model with the monojet signal

Autor(es)

Belyaev, A. ^{[1, 2]} ; Moretti, S. ^{[1, 2]} ; Fernandez Perez Tomei, T. R. ^[3] ; Novaes, S. F. ^[3] ; Mercadante, P. G. ^[4] ; Moon, C. S. ^[5] ; Panizzi, L. ^{[2, 6]} ; Rojas, F. ^{[2, 7]} ; Thomas, M. ^[2]

Afiliação do(s) autor(es)

^[1] Rutherford Appleton Lab, Particle Phys Dept, Didcot OX11 0QX, Oxon - England

^[2] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants - England

^[3] Univ Estadual Paulista, R Dr Bento Teobaldo Ferraz 271, BR-01140070 Sao Paulo, SP - Brazil

^[4] Univ Fed Abc, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil

^[5] Kyungpook Natl Univ, Daegu 41566 - South Korea

^[6] Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala - Sweden

^[7] Univ Tecn Federico Santa Maria, Ave Espana 1680, Valparaiso - Chile

• Tipo de documento: Artigo Científico
• Fonte: Physical Review D; v. 99, n. 1 JAN 7 2019.
• Citações Web of Science: 1

Resumo

The inert two- Higgs-doublet Model (i2HDM) is a well-motivated minimal consistent dark matter (DM) model, but it is rather challenging to test at the LHC in the parameter space allowed by relic density and DM direct detection constraints. This is especially true when considering the latest XENON 1T data on direct DM searches, which we use here to present the best current combined limit on the i2HDM parameter space. In this analysis, we present prospects to advance the exploitation of DM monojet signatures from the i2HDM at the LHC, by emphasising that a shape analysis of the missing transverse momentum distribution allows one to sizably improve the LHC discovery potential. For a key element of our analysis, we explore the validity of using an effective vertex, ggH, for the coupling of the Higgs boson to gluons using a full one-loop computation. We have found sizeable differences between the two approaches, especially in the high missing transverse momentum region, and incorporated the respective K-factors to obtain the correct kinematical distributions. As a result, we delineate a realistic search strategy and present the improved current and projected LHC sensitivity to the i2HDM parameter space. (AU)

• Processo FAPESP: 13/01907-0 - Centro de Pesquisa e Análise de São Paulo
• Beneficiário: Sergio Ferraz Novaes
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/50905-0 - Exploring Higgs boson and beyond the standard model theories at Large Hadron Collider
• Beneficiário: Sergio Ferraz Novaes
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/15897-4 - Busca por nova física no experimento CMS do Large Hadron Collider
• Beneficiário: Thiago Rafael Fernandez Perez Tomei
• Linha de fomento: Auxílio à Pesquisa - Regular