Results 1 to 10 of about 23,658,649 (263)
The exceptional sigma model [PDF]
Journal of High Energy Physics, 2018 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
Alex S. Arvanitakis, Chris D. A. Blair
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Journal of High Energy Physics, 2021 We introduce a two-dimensional sigma model associated with a Jacobi manifold. The model is a generalisation of a Poisson sigma model providing a topological open string theory.
Francesco Bascone +2 more
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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
Carroll, Sean M. +3 more
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Resurgence in the O(4) sigma model [PDF]
Journal of High Energy Physics, 2021 We analyze the free energy of the integrable two dimensional O(4) sigma model in a magnetic field. We use Volin’s method to extract high number (2000) of perturbative coefficients with very high precision.
Michael C. Abbott +4 more
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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 ...
Bonechi, Francesco +2 more
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Comments on nonlinear sigma models coupled to supergravity
Physics Letters B, 2017 N=1, D=4 nonlinear sigma models, parametrized by chiral superfields, usually describe Kählerian geometries, provided that Einstein frame supergravity is used.
Sergio Ferrara, Massimo Porrati
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Local β-deformations and Yang-Baxter sigma model [PDF]
Journal of High Energy Physics, 2018 Homogeneous Yang-Baxter (YB) deformation of AdS5 × S5 superstring is revisited. We calculate the YB sigma model action up to quadratic order in fermions and show that homogeneous YB deformations are equivalent to β-deformations of the AdS5 ×S5 background
Jun-ichi Sakamoto, Yuho Sakatani
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Generalized supersymmetry and sigma models [PDF]
Physics Letters B, 2014 In this paper, we discuss the generalizations of exact supersymmetries present in the supersymmetrized sigma models. These generalizations are made by making the supersymmetric transformation parameter field-dependent.
Banerjee, Rabin, Upadhyay, Sudhaker
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Complexified sigma model and duality [PDF]
Modern Physics Letters A, 2011 We show that the equations of motion associated with a complexified sigma-model action do not admit manifest dual SO(n,n) symmetry. In the process we discover new type of numbers which we called `complexoids' in order to emphasize their close relation ...
Buscher T. H. +4 more
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European Physical Journal C: Particles and Fields, 2017 We revisit the constraints on inflation models by using the current cosmological observations involving the latest local measurement of the Hubble constant ( $$H_{0} = 73.00\pm 1.75$$ H 0 = 73.00 ± 1.75 km s $$^{-1}$$ - 1 Mpc $$^{-1}$$ - 1 ).
Rui-Yun Guo, Xin Zhang
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