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Chiral fermions and the standard model from the matrix model compactified on a torus
Chiral fermions the standard model the matrix model
2011/1/7
It is shown that the IIB matrix model compactified on a six-dimensional torus with a nontrivial topology can provide chiral fermions and matter content close to the standard model on our four-dimensio...
The Backreaction of Anti-M2 Branes on a Warped Stenzel Space
Anti-M2 Branes Warped Stenzel Space
2010/12/23
We find the superpotential governing the supersymmetric warped M-theory solution with a transverse Stenzel space found by Cvetic, Gibbons, Lu and Pope in hep-th/0012011, and use this superpotential to...
We investigate potentials between pairs of static-light mesons in Nf=2 Lattice QCD, in different spin channels. The question of attraction and repulsion is particularly interesting with respect to the...
The concept of quasi-integrability: a concrete example
quasi-integrability concrete example
2010/12/23
We use the deformed sine-Gordon models recently presented by Bazeia et al to discuss possible definitions of quasi-integrability. We present one such definition and use it to calculate an infinite nu...
Lattice field theory is a useful tool for studying strongly interacting theories in condensed matter physics. A prominent example is the unitary Fermi gas: a two-component system of fermions interacti...
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...
Search for the IR fixed point in the Twisted Polyakov Loop scheme (II)
the IR fixed point the Twisted Polyakov Loop scheme (II)
2011/1/6
We measure the renormalized coupling in the Twisted Polyakov loop scheme for SU(3) gauge theory coupled with $N_f=12$ fundamental fermions. To find the infrared fixed point of this theory, we focus on...
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...
Deconfined SU(2) phase with a massive vector boson triplet
Deconfined SU(2) phase massive vector boson triplet
2011/1/7
We introduce a model of SU(2) and U(1) vector fields with a local U(2) symmetry. Its action can be obtained in the London limit of a gauge invariant regularization involving two scalar fields. Evidenc...
A novel method for evaluating correlation functions in lattice hadron spectroscopy
evaluating correlation functions lattice hadron spectroscopy
2011/1/6
We describe a new approach for evaluating hadronic correlation functions which combines Laplacian-Heaviside quark smearing with a stochastic estimator of quark propagators. This method utilizes noise ...
Recent developments on the determination of the spin-1/2 spectrum of the nucleon in full QCD are presented. Our focus is on the PACS-CS 2+1 flavor configurations made available through the ILDG. Using...
Hadron electric polarizability -- finite volume corrections
Hadron electric polarizability finite volume corrections
2011/1/7
We use the background field method to extract the polarizability for the neutral "pion". In our previous study we found that the polarizability for this system is negative which is believed to be a fi...
We present first results on the axial and pseudoscalar $\Delta$ form factors. The analysis is carried out in the quenched approximation where statistical errors are small and the lattice set-up can be...
Lattice Yang-Mills theories in any dimension may be regarded as coupled 1+1-dimensional integrable field theories. These integrable systems decouple at large center-of-mass energies, where the action ...