Results 1 - 10 of 3,823

The factorized S-matrix of CFT/AdS

by Matthias Staudacher , 2004
"... We argue that the recently discovered integrability in the large-N CFT/AdS system is equivalent to diffractionless scattering of the corresponding hidden elementary excitations. This suggests that, perhaps, the key tool for finding the spectrum of this system is neither the gauge theory’s dilatati ..."
Abstract - Cited by 240 (7 self) - Add to MetaCart
dilatation operator nor the string sigma model’s quantum Hamiltonian, but instead the respective factorized S-matrix. To illustrate the idea, we focus on the closed fermionic su(1|1) sector of the N = 4 gauge theory. We introduce a new technique, the perturbative asymptotic Bethe ansatz, and use

Bethe Ansatz for Quantum Strings

by Gleb Arutyunov, Sergey Frolov, Matthias Staudacher , 2004
"... We propose Bethe equations for the diagonalization of the Hamiltonian of quantum strings on AdS5×S 5 at large string tension and restricted to certain large charge states from a closed su(2) subsector. The ansatz differs from the recently proposed all-loop gauge theory asymptotic Bethe ansatz by add ..."
Abstract - Cited by 281 (16 self) - Add to MetaCart
We propose Bethe equations for the diagonalization of the Hamiltonian of quantum strings on AdS5×S 5 at large string tension and restricted to certain large charge states from a closed su(2) subsector. The ansatz differs from the recently proposed all-loop gauge theory asymptotic Bethe ansatz

On the gauge theory/geometry correspondence

by Rajesh Gopakumar, Cumrun Vafa - Adv. Theor. Math. Phys , 1999
"... The ’t Hooft expansion of SU(N) Chern-Simons theory on S3 is proposed to be exactly dual to the topological closed string theory on the S2 blow up of the conifold geometry. The B-field on the S2 has magnitude Ngs = λ, the ’t Hooft coupling. We are able to make a number of checks, such as finding exa ..."
Abstract - Cited by 274 (36 self) - Add to MetaCart
The ’t Hooft expansion of SU(N) Chern-Simons theory on S3 is proposed to be exactly dual to the topological closed string theory on the S2 blow up of the conifold geometry. The B-field on the S2 has magnitude Ngs = λ, the ’t Hooft coupling. We are able to make a number of checks, such as finding

Doublet-Triplet Fermionic Dark Matter

by Athanasios Dedes, Dimitrios Karamitros , 2014
"... We extend the Standard Model (SM) by adding a pair of fermionic SU(2)-doublets with opposite hypercharge and a fermionic SU(2)-triplet with zero hypercharge. We impose a discrete Z2-symmetry that distinguishes the SM fermions from the new ones. Then, gauge invariance allows for two renormalizable Yu ..."
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, the lightest of which contributes to Dark Matter (DM). We consider a case where the lightest neutral fermion is an equal admixture of the two doublets with mass MD close to the Z-boson mass. This state remains stable under radiative corrections thanks to a custodial SU(2)-symmetry and is consistent

Lattice perturbation theory for gluonic and fermionic

by I. T. Drummond, A. Hart, R. R. Horgan, L. C. Storoni A
"... We calculate the two loop Landau mean links and the one loop renormalisation of the anisotropy for Wilson and improved SU(3) gauge actions, using twisted boundary conditions as a gauge invariant infrared regulator. We show these accurately describe simulated results, and outline a method for generat ..."
Abstract - Cited by 3 (0 self) - Add to MetaCart
We calculate the two loop Landau mean links and the one loop renormalisation of the anisotropy for Wilson and improved SU(3) gauge actions, using twisted boundary conditions as a gauge invariant infrared regulator. We show these accurately describe simulated results, and outline a method

Fermions in higher representations. Some results about SU(2) with adjoint fermions.

by Luigi Del Debbio, Agostino Patella, Claudio Pica , 2008
"... We discuss the lattice formulation of gauge theories with fermions in arbitrary representations of the color group, and present the implementation of the RHMC algorithm for simulating dynamical Wilson fermions. A first dataset is presented for the SU(2) gauge theory with two fermions in the adjoint ..."
Abstract - Cited by 3 (3 self) - Add to MetaCart
We discuss the lattice formulation of gauge theories with fermions in arbitrary representations of the color group, and present the implementation of the RHMC algorithm for simulating dynamical Wilson fermions. A first dataset is presented for the SU(2) gauge theory with two fermions in the adjoint

The Fermion Mass Problem and the Anti-Grand Unification Model

by C. D. Froggatt, M. Gibson, H. B. Nielsen, D. J. Smith - in: Proceedings of the 29th International Conference on High Energy Physics , 1998
"... We describe the Anti-Grand Unification Model (AGUT) and the Multiple Point Principle (MPP) used to calculate the values of the Standard Model gauge coupling constants in the theory, from the requirement of the existence of degenerate vacua. The application of the MPP to the pure Standard Model predi ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
to the charged fermion mass spectrum using the chiral quantum numbers of the maximal AGUT gauge group SMG 3 × U(1)f, where SMG ≡ SU(3) × SU(2) × U(1). The neutrino mass and mixing problem is then briefly discussed for models with chiral flavour charges responsible for the charged fermion mass hierarchy. 1

AND INTERACTING FERMIONS

by unknown authors , 1983
"... The quantum fluctuations about a self-dual background field in SU(2) are computed. The background field consists of parallel and equal uniform chromomagnetic and chromoelectric fields. Determination of the gluon fluctuations about this field yields zero modes, which are naturally regularized by the ..."
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The quantum fluctuations about a self-dual background field in SU(2) are computed. The background field consists of parallel and equal uniform chromomagnetic and chromoelectric fields. Determination of the gluon fluctuations about this field yields zero modes, which are naturally regularized

SU(3) Gauge Theory with Adjoint Fermions

by F. Karsch, M. Lütgemeier , 1998
"... We analyze the finite temperature phase diagram of QCD with fermions in the adjoint representation. The simulations performed with four dynamical Majorana fermions, which is equivalent to two Dirac fermions, show that the deconfinement and chiral phase transitions occur at two distinct temperatures, ..."
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We analyze the finite temperature phase diagram of QCD with fermions in the adjoint representation. The simulations performed with four dynamical Majorana fermions, which is equivalent to two Dirac fermions, show that the deconfinement and chiral phase transitions occur at two distinct temperatures

Large-volume results in SU(2) with adjoint fermions

by L. Del Debbio, The Higgs, Centre Theoretical Physics, B. Lucini, C. Pica, A. Patella, A. Rago, S. Roman , 2013
"... Taming finite-volume effects is a crucial ingredient in order to identify the existence of IR fixed points. We present the latest results from our numerical simulations of SU(2) gauge theory with 2 Dirac fermions in the adjoint representation on large volumes. We compare with previous results, and e ..."
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Taming finite-volume effects is a crucial ingredient in order to identify the existence of IR fixed points. We present the latest results from our numerical simulations of SU(2) gauge theory with 2 Dirac fermions in the adjoint representation on large volumes. We compare with previous results
Results 1 - 10 of 3,823