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Abstract
Several popular extensions of the Standard Model predict extra vector fields that transform as triplets under the gauge group SU(2)_L. These multiplets contain Z' and W' bosons, with masses and couplings related by gauge invariance. We review some model-independent results about these new vector bosons, with emphasis on di-lepton and lepton-plus-missing-energy signals at the LHC.
Highlights
Extra vector bosons are a common feature of all theories beyond the Standard Model (SM) with an extended gauge group
Vector triplets appear in many models beyond the SM
We have showed how their phenomenology can be studied in a model-independent fashion, using an effective Lagrangian that describes their general interactions with the SM particles
Summary
Extra vector bosons are a common feature of all theories beyond the Standard Model (SM) with an extended gauge group. It is convenient to use this piece of information to systematically organize the analyses of the new vectors from a model-independent point of view [1] In this phenomenological approach, gauge invariance under GSM plays two crucial, related roles: it provides a classification principle and it restricts the possible interactions of the new particles, giving rise to a simple and natural parameterization in terms of masses and couplings. Assuming renormalizable interactions to avoid suppressions from a higher scale, gauge invariance implies that only fifteen different multiplets of vector bosons can be singly produced at colliders [1]. Only vector bosons, together with singlets B, that can give rise to sizable resonant signals with leptonic final states at the LHC [3].3 Unlike singlets, they have charged components that can contribute to lepton-plus-missingtransverse-energy ( + E/ T ) events. We will emphasize the possibility of combining the data from searches of Z and W bosons in this context
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