One-loop SQCD corrections to the decay of top squarks to charm and neutralino in the generic MSSM
Data(s) |
11/02/2015
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Resumo |
In this article we calculate the one-loop supersymmetric QCD (SQCD) corrections to the decay u˜1→cχ˜01 in the minimal supersymmetric standard model with generic flavor structure. This decay mode is phenomenologically important if the mass difference between the lightest squark u˜1 (which is assumed to be mainly stoplike) and the neutralino lightest supersymmetric particle χ˜01 is smaller than the top mass. In such a scenario u˜1→tχ˜01 is kinematically not allowed and searches for u˜1→Wbχ˜01 and u˜1→cχ˜01 are performed. A large decay rate for u˜1→cχ˜01 can weaken the LHC bounds from u˜1→Wbχ01 which are usually obtained under the assumption Br[u˜1→Wbχ01]=100%. We find the SQCD corrections enhance Γ[u˜1→cχ˜01] by approximately 10% if the flavor violation originates from bilinear terms. If flavor violation originates from trilinear terms, the effect can be ±50% or more, depending on the sign of At. We note that connecting a theory of supersymmetry breaking to LHC observables, the shift from the DR¯¯¯¯¯ to the on-shell mass is numerically very important for light stop decays. |
Formato |
application/pdf |
Identificador |
http://boris.unibe.ch/64207/1/PhysRevD.91.pdf Aebischer, Jason; Crivellin, Andreas; Greub, Christoph (2015). One-loop SQCD corrections to the decay of top squarks to charm and neutralino in the generic MSSM. Physical review. D - particles, fields, gravitation, and cosmology, 91(3), 035010. Melville, N.Y.: American Physical Society 10.1103/PhysRevD.91.035010 <http://dx.doi.org/10.1103/PhysRevD.91.035010> doi:10.7892/boris.64207 info:doi:10.1103/PhysRevD.91.035010 urn:issn:1550-7998 |
Idioma(s) |
eng |
Publicador |
American Physical Society |
Relação |
http://boris.unibe.ch/64207/ |
Direitos |
info:eu-repo/semantics/openAccess |
Fonte |
Aebischer, Jason; Crivellin, Andreas; Greub, Christoph (2015). One-loop SQCD corrections to the decay of top squarks to charm and neutralino in the generic MSSM. Physical review. D - particles, fields, gravitation, and cosmology, 91(3), 035010. Melville, N.Y.: American Physical Society 10.1103/PhysRevD.91.035010 <http://dx.doi.org/10.1103/PhysRevD.91.035010> |
Palavras-Chave | #530 Physics |
Tipo |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed |