The U (1)′ symmetry associated with a possible heavy Z′ would have profound
implications for particle physics and cosmology. The motivations for such particles in various …

As the LHC prepares to start taking data, this review is intended to provide a QCD theorist's
understanding and views on jet finding at hadron colliders, including recent developments …

A bstract We introduce a model-independent strategy to study narrow resonances which we
apply to a heavy vector triplet of the Standard Model (SM) group for illustration. The method …

The fundamental building blocks of the proton—quarks and gluons—have been known for
decades. However, we still have an incomplete theoretical and experimental understanding …

For the closing article in this volume on supersymmetry, we consider the alternative options
to SUSY theories: we present an overview of composite Higgs models in light of the …

This is an introduction to theories where the Higgs is a composite Nambu-Goldstone boson
of a new strongly-interacting dynamics not much above the weak scale. A general …

General consequences of mass mixing between the ordinary Z boson and a relatively light Z
d boson, the “dark” Z, arising from a U (1) d gauge symmetry, associated with a hidden …

The hierarchy problem and the electroweak data, together, provide a plausible motivation for
considering a light Higgs emerging as a pseudo-Goldstone boson from a strongly-coupled …

We study high-p T jets from QCD and from highly boosted massive particles such as tops, W,
Z, and Higgs bosons, and argue that infrared-safe observables can help reduce QCD …

Heavy neutral gauge bosons arise in many motivated models of beyond the Standard Model
Physics. Experimental searches require that such gauge bosons are above the TeV scale in …