Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-08-23
JHEP 0711:073,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
34 pages, 2 figures, Revised version in which D-term and F-term contributions are slightly changed
Scientific paper
10.1088/1126-6708/2007/11/073
Sfermion masses and eigenstates in the supersymmetric economical 3-3-1 model are studied. By lepton number conservation, the exotic squarks and superpartners of ordinary quarks are decoupled. Due to the fact that in the 3-3-1 models, one generation of quarks behaves differently from other two, by R-parity conservation, the mass mixing matrix of the squarks in this model are smaller than that in the Minimal Supersymmetric Standard Model (MSSM). Assuming substantial mixing in pairs of highest flavours, we are able to get mass spectrum and eigenstates of all the sfermions. In the effective approximation, the slepton mass splittings in the first two generations, are consistent with those in the MSSM, namely: $ m^2_{\tilde{l}_L} - m^2_{\tilde{\nu}_{l L}} = m_W^2 \cos 2\ga$ $(l=e, \mu)$. In addition, within the above effective limit, there exists degeneracy among sneutrinos in each multiplet: $m^2_{\tilde{\nu}_{l L}} = m^2_{\tilde{\nu}_{l R}}$. In contradiction to the MSSM, the squark mass splittings are different for each generation and not to be $ m_W^2 \cos 2\ga$.
Dong Phung Van
Huong Tr. T.
Long Hoang Ngoc
Thuy Nguyen Thu
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