Spinning Strings and Integrable Spin Chains in the AdS/CFT Correspondence Jan Plefka
... are therefore derived, non-fundamental objects, just as the theory of gravity itself. Ironically though, advances in our understanding of non-perturbative string theory and of D-branes have led to a resurrection of gauge fields as fundamental objects. Namely, it is now generally believed that string ...
... are therefore derived, non-fundamental objects, just as the theory of gravity itself. Ironically though, advances in our understanding of non-perturbative string theory and of D-branes have led to a resurrection of gauge fields as fundamental objects. Namely, it is now generally believed that string ...
Quantum hair on black holes
... 2©z 1 relative to the contribution from the ordinary Einstein term near the 1/M) horizon, and even smaller outside. Since the region inside the horizon is causally disconnected from the exterior of the black hole, the occurrence of truly large curvature near the singularity inside the horizon is not ...
... 2©z 1 relative to the contribution from the ordinary Einstein term near the 1/M) horizon, and even smaller outside. Since the region inside the horizon is causally disconnected from the exterior of the black hole, the occurrence of truly large curvature near the singularity inside the horizon is not ...
Particle Physics Part III Major Option 2008
... Empirically, the strong force is short range and therefore know that the physical gluons are confined. The colour singlet state does not exist in nature ! NOTE: this is not entirely ad hoc. In the context of gauge field theory (see minor option) the strong interaction arises from a fundamental SU( ...
... Empirically, the strong force is short range and therefore know that the physical gluons are confined. The colour singlet state does not exist in nature ! NOTE: this is not entirely ad hoc. In the context of gauge field theory (see minor option) the strong interaction arises from a fundamental SU( ...
Lattice QCD
... Boundary condition is imposed on each field in finite volume: Momentum space is restricted in finite Brillouin zone: Lattice QCD is an Ultra-Violet (UV) finite theory Lattice action is not unique, above action is the simplest one! Many implementations were proposed to reduce the discretization err ...
... Boundary condition is imposed on each field in finite volume: Momentum space is restricted in finite Brillouin zone: Lattice QCD is an Ultra-Violet (UV) finite theory Lattice action is not unique, above action is the simplest one! Many implementations were proposed to reduce the discretization err ...
Beyond the Standard Model
... description of the strong interactions is by a gauge theory, called quantumchromodynamics, or QCD for short. Quarks and gluons can be arranged as multiplets of the gauge group of QCD, which is SU(3). The associated charges are called color, and there are three quark colors and three anti-quark color ...
... description of the strong interactions is by a gauge theory, called quantumchromodynamics, or QCD for short. Quarks and gluons can be arranged as multiplets of the gauge group of QCD, which is SU(3). The associated charges are called color, and there are three quark colors and three anti-quark color ...
Octonion model of dark matter
... • The standard model does not provide an explanation of gravity [19]. Moreover it is incompatible with the most successful theory of gravity to date, general relativity. • According to the standard model the neutrinos are massless particles [20, 21]. However, neutrino oscillation experiments have sh ...
... • The standard model does not provide an explanation of gravity [19]. Moreover it is incompatible with the most successful theory of gravity to date, general relativity. • According to the standard model the neutrinos are massless particles [20, 21]. However, neutrino oscillation experiments have sh ...
$doc.title
... The perturbation expansion • Solve the equations perturbatively in the outer and inner regions & match the solutions in the throat • Full outer region metric: ...
... The perturbation expansion • Solve the equations perturbatively in the outer and inner regions & match the solutions in the throat • Full outer region metric: ...
Standard Model is an Effective Theory
... If the + sign is chosen, the extra dimension is time-like, then in 4-d we would interpret p52 as a tachyonic mass term, leading to violations of causality Thus extra dimensions are usually considered to be space-like ...
... If the + sign is chosen, the extra dimension is time-like, then in 4-d we would interpret p52 as a tachyonic mass term, leading to violations of causality Thus extra dimensions are usually considered to be space-like ...
The Facets of Relativistic Quantum Field Theory1
... accounting for certain regularities observed in the phenomena. Local gauge symmetry is the most prominent instance of such a feature. The invariance of all interactions of the Standard Model under local gauge transformations of its quantum fields determines the form of this theory to a large extent. ...
... accounting for certain regularities observed in the phenomena. Local gauge symmetry is the most prominent instance of such a feature. The invariance of all interactions of the Standard Model under local gauge transformations of its quantum fields determines the form of this theory to a large extent. ...
Breakdown of NRQCD Factorization
... At first look, these results are “strange”, because •If the singularity appears in P-wave channel (the 3. line), one should find it in previous studies at one-loop level, because at tree level a gluon can not fragment into P-wave state. • NRQCD is formulated in the rest frame of a heavy quark pair, ...
... At first look, these results are “strange”, because •If the singularity appears in P-wave channel (the 3. line), one should find it in previous studies at one-loop level, because at tree level a gluon can not fragment into P-wave state. • NRQCD is formulated in the rest frame of a heavy quark pair, ...
Anticipating New Physics at the LHC
... •A component of Dark Matter could be the Lightest Neutralino of Supersymmetry - stable and neutral with mass ~ 0.1 – 1 TeV •In this case, electroweak strength annihilation gives relic density of ...
... •A component of Dark Matter could be the Lightest Neutralino of Supersymmetry - stable and neutral with mass ~ 0.1 – 1 TeV •In this case, electroweak strength annihilation gives relic density of ...
Gauge fixing
In the physics of gauge theories, gauge fixing (also called choosing a gauge) denotes a mathematical procedure for coping with redundant degrees of freedom in field variables. By definition, a gauge theory represents each physically distinct configuration of the system as an equivalence class of detailed local field configurations. Any two detailed configurations in the same equivalence class are related by a gauge transformation, equivalent to a shear along unphysical axes in configuration space. Most of the quantitative physical predictions of a gauge theory can only be obtained under a coherent prescription for suppressing or ignoring these unphysical degrees of freedom.Although the unphysical axes in the space of detailed configurations are a fundamental property of the physical model, there is no special set of directions ""perpendicular"" to them. Hence there is an enormous amount of freedom involved in taking a ""cross section"" representing each physical configuration by a particular detailed configuration (or even a weighted distribution of them). Judicious gauge fixing can simplify calculations immensely, but becomes progressively harder as the physical model becomes more realistic; its application to quantum field theory is fraught with complications related to renormalization, especially when the computation is continued to higher orders. Historically, the search for logically consistent and computationally tractable gauge fixing procedures, and efforts to demonstrate their equivalence in the face of a bewildering variety of technical difficulties, has been a major driver of mathematical physics from the late nineteenth century to the present.