Composite vectors in Higgless models at the LHC

Abstract

In the context of a strongly coupled Electroweak Symmetry Breaking, composite triplet of heavy vectors degenerate in mass belonging to the $SU(2{)}_{L+R}$ adjoint representation may arise from a new strong interaction invariant under the global $SU(2{)}_L\times SU(2{)}_R$ symmetry, which is spontaneously broken down to $SU(2{)}_{L+R}$. Assuming that the interactions among these heavy vector states and with the Standard Model gauge bosons are described by a $SU(2{)}_L\times SU(2{)}_R/SU(2{)}_{L+R}$ Effective Chiral Lagrangian, the heavy vector pair production at the LHC by Vector Boson Fusion and Drell-Yan annihilation is studied in this framework. The expected rates of same sign di-lepton and tri-lepton events from the decay of the composite vectors into Standard Model gauge bosons are computed.

Comments: 7 pages. Based on talk given at the XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects, 19 -23 April 2010, Convitto della Calza, Firenze, Italy, published in the Proceedings of this Workshop. References added