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2014.
Low energy constraints and scalar leptoquarks
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 (∗) τ ν τ decays. Constraints coming from Z → bb , 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.