Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-09-10
Phys.Rev.D77:011701,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 3 figures
Scientific paper
10.1103/PhysRevD.77.011701
Existence of color sextet diquark Higgs fields with TeV masses will indicate a fundamentally different direction for unification than conventional grand unified theories. There is a class of partial unification models based on the gauge group $SU(2)_L\times SU(2)_R\times SU(4)_c$ that implement the seesaw mechanism for neutrino mass with seesaw scale around $10^{11}$ GeV, where indeed such light fields appear naturally despite the high gauge symmetry breaking scale. They couple only to up-type quarks in this model. We discuss phenomenological constraints on these fields and show that they could be detected at LHC via their decay to either $tt$ or single top + jet. We also find that existing Tevatron data gives a lower bound on its mass somewhere in the 400-500 GeV, for reasonable values of its coupling.
Mohapatra Rabindra N.
Okada Nobuchika
Yu Hai-Bo
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