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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

LHC dark matter signals from vector resonances and top partners

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Autor(es):
Belyaev, Alexander S. [1, 2] ; Flacke, Thomas [3] ; Jain, Bithika [4, 5, 6] ; Schaefers, Patrick B. [2]
Número total de Autores: 4
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] Inst for Basic Sci Korea, Ctr Theoret Phys Universe, Daejeon 34126 - South Korea
[4] Univ Estadual Paulista, ICTP South Amer Inst Fundamental Res, BR-01140070 Sao Paulo - Brazil
[5] Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo - Brazil
[6] Korea Inst Adv Study, Sch Phys, Seoul 02455 - South Korea
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: Physical Review D; v. 98, n. 3 AUG 15 2018.
Citações Web of Science: 0
Resumo

Extensions of the standard model which address the hierarchy problem and dark matter (DM) often contain top partners and additional resonances at the TeV scale. We explore the phenomenology of a simplified effective model with a vector resonance Z', a fermionic vectorlike colored partner of the top quark T' as well as a scalar DM candidate phi and provide publicly available implementations in CalcHEP and MadGraph. We study the pp -> Z' -> T'(T) over bar'-> t (t) over bar phi phi process at the LHC and find that it plays an important role in addition to the T'(T) over bar' production via strong interactions. It turns out that the presence of the Z' can provide a dominant contribution to the t (t) over bar + ET signature without conflicting with existing bounds from Z' searches in di-jet and di-lepton final states. We find that, through this process, the LHC is already probing DM masses up to about 900 GeVand top partner masses up to about 1.5 TeV, thus exceeding the current bounds from QCD production alone almost by a factor of 2 for both particles. (AU)

Processo FAPESP: 16/01343-7 - ICTP Instituto Sul-Americano para Física Fundamental: um centro regional para física teórica
Beneficiário:Nathan Jacob Berkovits
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 17/05770-0 - Explorando a quebra de simetria eletrofraca e a natureza da matéria escura
Beneficiário:Bithika Jain
Linha de fomento: Bolsas no Brasil - Pós-Doutorado