We have performed a detailed Monte Carlo exploration of the parameter space for a warped Higgsless model of electroweak symmetry breaking in 5 dimensions. This model is based on the SU (2) L × SU (2) R × U (1) B−L gauge group in an AdS 5 bulk with arbitrary gauge kinetic terms on both the Planck and TeV branes. Constraints arising from precision electroweak measurements and collider data are fo...

We present a new gauge-independent approach to resonant transition amplitudes with nonconserved external currents, based on the pinch technique method. In the context of 2 → 2 and 2 → 3 scattering processes, we show explicitly that the analytic results derived respect U(1)em gauge symmetry and do not depend on the choice of the SU(2)L gauge fixing. Our analytic approach treats, on equal footing...

We examine the phenomenology of a warped 5-dimensional model based on SU(2)L× SU(2)R× U(1)B−L model which implements electroweak symmetry breaking through boundary conditions, without the presence of a Higgs boson. We use precision electroweak data to constrain the general parameter space of this model. Our analysis includes independent L and R gauge couplings, radiatively induced UV boundary g...

I survey the parameter space of NAHE-based free fermionic heterotic string models. First, I discuss flat directions of the low energy effective field theories and show that D-flat directions need not be isomorphic to gauge invariant superpotential terms. Next, I review recent studies of three generation SU(3)C × SU(2)L × U(1)Y , SU(3)C ×SU(2)L ×SU(2)R ×U(1)B−L, SU(4)C × SU(2)L ×U(1)Y ′ , and fl...

One or more heavy spin-1 fields may replace the Higgs boson in keeping perturbative unitarity up to a few TeV while at the same time account for the electroweak precision tests. We study the Drell-Yan production of heavy vector and axial-vector states in generic Higgsless models at hadron colliders. We analyse in particular the l+l−, WZ, and three SM gauge boson final states. In the l+l− case w...

Landau levels have represented a very rich field of research, which has gained widespread attention after their application to quantum Hall effect. In a particular gauge, the holomorphic gauge, they give a physical implementation of Bargmann's Hilbert space of entire functions. They have also been recognized as a natural bridge between Feynman's path integral and Geometric Quantiza-tion. We dis...

We show that the one-dimensional projection of Chern-Simons gauged Nonlinear Schrödinger model is eqivalent to an Abelian gauge field theory of continuum Heisenberg spin chain. In such a theory, the matter field has geometrical meaning of coordinates in tangent plane to the spin phase space, while the U(1) gauge symmetry relates to rotation in the plane. This allows us to construct the infinite...

We construct a model based on an extra gauge symmetry, SU(2)X×U(1)B−L, which can provide gauge bosons to serve as weakly-interacting massive particle dark matter. The stability of the dark matter is naturally guaranteed by a discrete Z2 symmetry that is a subgroup of SU(2)X . The dark matter interacts with standard model fermions by exchanging gauge bosons which are linear combinations of SU(2)...

We analyze the implications of the relation Trγ5 = 0, which is customarily assumed in practical lattice calculations. On the basis of the finite dimensional representations of the Ginsparg-Wilson algebra, it is shown that this relation reflects the species doubling in lattice theory; topological excitations associated with species doublers, which have eigenvalue 2/a, contribute to Trγ5 without ...

Abstract We review the relation between half-BPS Wilson–’t Hooft line operators in ${\mathcal{N}}=2$ supersymmetric gauge theories on twisted space-time $S^1 \times_\epsilon \mathbb{R}^2 \times \mathbb{R}$ and transfer matrices constructed from trigonometric L-operators of an integrable system.