The anisotropic Ising superantiferromagnet on a simple cubic lattice in the presence of a magnetic field: Effective-field theory analysis

2013 ◽  
Vol 431 ◽  
pp. 80-83 ◽  
Author(s):  
J. Ricardo de Sousa ◽  
Minos A. Neto ◽  
Igor T. Padilha ◽  
Octavio D.R. Salmon ◽  
J. Roberto Viana
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Effective Field Theory ◽  
Effective Field ◽  
Theory Analysis ◽  
Cubic Lattice ◽  
Simple Cubic ◽  
Simple Cubic Lattice

scholarly journals Effective field theory analysis of dark matter-standard model interactions with spin one mediators

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Fabiola Fortuna ◽  
Pablo Roig ◽  
José Wudka
Keyword(s):  
Field Theory ◽  
Dark Matter ◽  
Standard Model ◽  
Effective Field Theory ◽  
Gamma Ray ◽  
Direct Detection ◽  
Effective Field ◽  
Indirect Detection ◽  
Theory Analysis ◽  
Invisible Decay

Abstract We analyze interactions between dark matter and standard model particles with spin one mediators in an effective field theory framework. In this paper, we are considering dark particles masses in the range from a few MeV to the mass of the Z boson. We use bounds from different experiments: Z invisible decay width, relic density, direct detection experiments, and indirect detection limits from the search of gamma-ray emissions and positron fluxes. We obtain solutions corresponding to operators with antisymmetric tensor mediators that fulfill all those requirements within our approach.

scholarly journals Phase transition induced by an external field in a three-dimensional isotropic Heisenberg antiferromagnet

2018 ◽  
Vol 32 (32) ◽  
pp. 1850390
Author(s):  
Minos A. Neto ◽  
J. Roberto Viana ◽  
Octavio D. R. Salmon ◽  
E. Bublitz Filho ◽  
José Ricardo de Sousa
Keyword(s):  
Magnetic Field ◽  
Mean Field ◽  
Three Dimensional ◽  
Effective Field ◽  
The Body ◽  
Bravais Lattice ◽  
Body Centered Cubic ◽  
Cubic Lattice ◽  
Cubic Lattices ◽  
Simple Cubic

The critical frontier of the isotropic antiferromagnetic Heisenberg model in a magnetic field along the z-axis has been studied by mean-field and effective-field renormalization group calculations. These methods, abbreviated as MFRG and EFRG, are based on the comparison of two clusters of different sizes, each of them trying to mimic a specific Bravais lattice. The frontier line in the plane of temperature versus magnetic field was obtained for the simple cubic and the body-centered cubic lattices. Spin clusters with sizes N = 1, 2, 4 were used so as to implement MFRG-12, EFRG-12 and EFRG-24 numerical equations. For the simple cubic lattice, the MFRG frontier exhibits a notorious re-entrant behavior. This problem is improved by the EFRG technique. However, both methods agree at lower fields. For the body-centered cubic lattice, the MFRG method did not work. As in the cubic lattice, all the EFRG results agree at lower fields. Nevertheless, the EFRG-12 approach gave no solution for very low temperatures. Comparisons with other methods have been discussed.

scholarly journals Effective field theory analysis of Higgs naturalness

2015 ◽  
Vol 92 (1) ◽  
Author(s):  
Shaouly Bar-Shalom ◽  
Amarjit Soni ◽  
Jose Wudka
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Effective Field ◽  
Theory Analysis

scholarly journals Stationary State Solutions of a Bond Diluted Kinetic Ising Model: An Effective-Field Theory Analysis

2012 ◽  
Vol 147 (6) ◽  
pp. 1068-1076 ◽  
Author(s):  
E. Vatansever ◽  
B. O. Aktas ◽  
Y. Yüksel ◽  
U. Akinci ◽  
H. Polat
Keyword(s):  
Field Theory ◽  
Ising Model ◽  
Stationary State ◽  
Effective Field Theory ◽  
Effective Field ◽  
Theory Analysis ◽  
Kinetic Ising Model
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