Results 21 to 30 of about 7,711,295 (297)
Communications in Mathematical Physics, 2005 We introduce a new topological sigma model, whose fields are bundle maps from the tangent bundle of a 2-dimensional world-sheet to a Dirac subbundle of an exact Courant algebroid over a target manifold. It generalizes simultaneously the (twisted) Poisson sigma model as well as the G/G-WZW model.
Kotov, A., Schaller, P., Strobl, T.
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Common myths of six sigma demystified [PDF]
, 2008 Purpose – Six Sigma has been part of our business lexicon for more than a decade. Debates on its emergence as a strategic initiative have created critics who consider it as an old wine in a new bottle. Is Six Sigma a management fad? This article presents
Kumar, Maneesh +4 more
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The exceptional sigma model [PDF]
Journal of High Energy Physics, 2018 Abstract We detail the construction of the exceptional sigma model, which describes a string propagating in the “extended spacetime” of exceptional field theory. This is to U-duality as the doubled sigma model is to T-duality. Symmetry specifies the Weylinvariant Lagrangian uniquely and we show how it reduces to the correct 10 ...
Alex S. Arvanitakis, Chris D. A. Blair
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Physical Review D, 2009 Theories of low-energy Lorentz violation by a fixed-norm "aether" vector field with two-derivative kinetic terms have a globally bounded Hamiltonian and are perturbatively stable only if the vector is timelike and the kinetic term in the action takes the form of a sigma model. Here we investigate the phenomenological properties of this theory. We first
Carroll, Sean M. +3 more
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Cosmology of linear Higgs-sigma models with conformal invariance
Journal of High Energy Physics, 2021 We consider general linear Higgs-sigma models as ultra-violet completions of the Higgs inflation. We introduce general higher curvature terms beyond Einstein gravity and recast them into a class of linear Higgs-sigma models in the scalar-dual formulation
Hyun Min Lee, Adriana G. Menkara
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New integrable coset sigma models
Journal of High Energy Physics, 2021 By using the general framework of affine Gaudin models, we construct a new class of integrable sigma models. They are defined on a coset of the direct product of N copies of a Lie group over some diagonal subgroup and they depend on 3N − 2 free ...
Gleb Arutyunov +2 more
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An application of Six Sigma to reduce waste [PDF]
, 2005 Six Sigma has been considered a powerful business strategy that employs a well-structured continuous improvement methodology to reduce process variability and drive out waste within the business processes using effective application of statistical tools ...
Antony, Jiju
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Renormalization of supersymmetric Lifshitz sigma models
Journal of High Energy Physics, 2023 We study the renormalization of an N $$ \mathcal{N} $$ = 1 supersymmetric Lifshitz sigma model in three dimensions. The sigma model exhibits worldvolume anisotropy in space and time around the high-energy z = 2 Lifshitz point, such that the worldvolume ...
Ziqi Yan
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Comparing Poisson Sigma Model with A-model [PDF]
Journal of High Energy Physics, 2016 We discuss the A-model as a gauge fixing of the Poisson Sigma Model with target a symplectic structure. We complete the discussion in [arXiv:0706.3164], where a gauge fixing defined by a compatible complex structure was introduced, by showing how to recover the A-model hierarchy of observables in terms of the AKSZ observables.
Bonechi Francesco +2 more
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Non-compact nonlinear sigma models
Physics Letters B, 2016 The target space of a nonlinear sigma model is usually required to be positive definite to avoid ghosts. We introduce a unique class of nonlinear sigma models where the target space metric has a Lorentzian signature, thus the associated group being non ...
Claudia de Rham +2 more
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