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Ordinary matter is described by six fundamental parameters: three couplings (gravitational, electromagnetic and strong) and three masses: the electron's ($m_e$) and those of the up ($m_u$) and down ($...
Ordinary matter is described by six fundamental parameters: three couplings (gravitational, electromagnetic and strong) and three masses: the electron's ($m_e$) and those of the up ($m_u$) and down ($...
Haag's theorem states that if a quantum field theory is Lorentz invariant and irreducible, there is no interaction picture. But if we construct quantum field theory on a discrete lattice spacetime, it...
Haag's theorem states that if a quantum field theory is Lorentz invariant and irreducible, there is no interaction picture. But if we construct quantum field theory on a discrete lattice spacetime, it...
Can Lorentz-breaking fermionic condensates form in large N strongly-coupled Lattice Gauge Theories?
Lorentz-breaking fermionic condensates N strongly-coupled Lattice Gauge Theories
2011/1/6
The possibility of Lorentz symmetry breaking (LSB) has attracted considerable attention in recent years for a variety of reasons, including the attractive prospect of the graviton as a Goldstone boson...
Can Lorentz-breaking fermionic condensates form in large N strongly-coupled Lattice Gauge Theories?
Lorentz-breaking fermionic condensates N strongly-coupled Lattice Gauge Theories
2011/1/6
The possibility of Lorentz symmetry breaking (LSB) has attracted considerable attention in recent years for a variety of reasons, including the attractive prospect of the graviton as a Goldstone boson...
The phase-shift of isospin-2 pi-pi scattering from lattice QCD
The phase-shift of isospin-2 pi-pi scattering lattice QCD
2011/1/7
Finite-volume lattice QCD calculations offer the possibility of extracting resonance parameters from the energy-dependent elastic phase-shift computed using the Luescher technique. In this letter, as ...
Analytic Approximations for the Extrapolation of Lattice Data
Analytic Approximations the Extrapolation
2011/1/7
We present analytic approximations of chiral SU(3) amplitudes for the extrapolation of lattice data to the physical masses and the determination of Next-to-Next-to-Leading-Order low-energy constants. ...
Chiral symmetry breaking revisited: the gap equation with lattice ingredients
Chiral symmetry breaking revisited the gap equation lattice ingredients
2011/1/7
We study chiral symmetry breaking in QCD, using as ingredients in the quark gap equation recent lattice results for the gluon and ghost propagators. The Ansatz employed for the quark-gluon vertex is p...
Supersymmetry on the lattice and the status of the Super-Yang-Mills simulations
the lattice the Super-Yang-Mills simulations
2011/1/6
Supersymmetry (SUSY) and supersymmetric field theories are an interesting topic for numerical lattice simulations. Similar to the chiral symmetry there is also no local realization of (interacting) su...
Exploration of the phase structure of $SU(N_c)$ lattice gauge theory with many Wilson fermions at strong coupling
the phase structure Wilson fermions
2011/1/6
We explore aspects of the phase structure of SU(2) and SU(3) lattice gauge theories at strong coupling with many flavours $N_f$ of Wilson fermions in the fundamental representation, including the rele...
Supersymmetry restoration in lattice formulations of 2D $\mathcal{N}=(2,2)$ WZ model based on the Nicolai map
Supersymmetry restoration lattice formulations
2011/1/6
For lattice formulations of the two-dimensional $\mathcal{N}=(2,2)$ Wess--Zumino (2D $\mathcal{N}=(2,2)$ WZ) model on the basis of the Nicolai map, we show that supersymmetry (SUSY) and other symmetri...
Propagators in lattice Coulomb gauge and confinement mechanisms
lattice Coulomb gauge confinement mechanisms
2011/1/6
We discuss the gluon propagator in 3- and 4-dimensional Yang-Mills theories in Coulomb gauge and compare it with the corresponding Landau gauge propagator, showing that for both the relevant IR mass s...
Non-perturbative running of the coupling from four flavour lattice QCD with staggered quarks
Non-perturbative running four flavour lattice QCD
2011/1/7
Using the Schr\"odinger functional (SF) with a single staggered fermion field we calculate the SF coupling in four-flavour QCD for a wide range of energies and lattice sizes up to $L/a=16$. Preliminar...
Unquenching the Landau Gauge Lattice Propagators and the Gribov Problem
Unquenching Landau Gauge Lattice Propagators
2011/1/6
The gluon and ghost propagators are computed using both quenched and dynamical configurations for the same lattice spacings. The Wilson fermions are simulated at several quark masses. Furthermore, the...