Leptoquarks and vector-like strong interactions at the TeV scale

Leptoquarks and vector-like strong interactions at the TeV scale

In a vector-like extension of the minimal standard model with mirror fermions leptoquarks can be bound states of fermion-mirror-fermion pairs held together by a new strong interaction at the TeV scale. The small couplings of leptoquarks to light fermion pairs arise due to mixing. The large Q event excess at HERA and also the high ET jet excess at Tevatron can potentially be explained.

Substructure and Strong Interactions at the TeV Scale

Unification of Weak and Hypercharge Interactions at the TeV Scale

A realistic SU(3)C × SU(3)W unified theory is constructed with a TeV sized extra dimension compactified on the orbifold S1/Z2, leaving only the standard model gauge group SU(3)C×SU(2)L×U(1)Y unbroken in the low energy 4D theory. The Higgs doublets are zero modes of bulk SU(3)W triplets and serve to normalize the hypercharge generator, apparently giving a tree-level prediction for the weak mixin...

Do Weak Interactions Become Strong at 10 TeV ? ”

w Simple model calculations indicate that instanton estimates of high-energy scattering amplitudes are unreliable when the number of final state particles becomes large. This casts doubt on recent claims that the cross section for baryon number violation becomes large at high energy.

Leptoquarks and Contact Interactions at HERA

Abstract. Leptoquark and Contact Interaction searches have been performed in e±p collisions at HERA at a centre-of-mass energy of 300-320 GeV. The deep inelastic scattering data collected in the years 1994-2005 have been used for searches thus exploiting nearly whole available HERA statistics. No evidence for the leptoquarks was found. The limits from searches of leptoquarks coupling to first g...