Low energy constraints and scalar leptoquarks⋆
1 Department of Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia and J. Stefan Institute, Jamova 39, P. O. Box 3000, 1001 Ljubljana, Slovenia
2 J. Stefan Institute, Jamova 39, P. O. Box 3000, 1001 Ljubljana, Slovenia
3 Department of Physics, University of Sarajevo, Zmaja od Bosne 33-35, 71000 Sarajevo, Bosnia and Herzegovina
Published online: 24 November 2014
The presence of a colored weak doublet scalar state with mass below 1 TeV can provide an explanation of the observed branching ratios in B → D(∗)τντ decays. Constraints coming from Z → bb̄, muon g − 2, lepton flavor violating decays are derived. The colored scalar is accommodated within 45 representation of SU(5) group of unification. We show that presence of color scalar can improve mass relations in the up-type quark sector mass. Impact of the colored scalar embedding in 45-dimensional representation of SU(5) on low-energy phenomenology is also presented.
© Owned by the authors, published by EDP Sciences, 2014
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