Results 21 to 30 of about 98,864 (312)
Effective field theories and inflation [PDF]
Journal of Cosmology and Astroparticle Physics, 2003 We investigate the possible influence of very-high-energy physics on inflationary predictions focussing on whether effective field theories can allow effects which are parametrically larger than order H^2/M^2, where M is the scale of heavy physics and H is the Hubble scale at horizon exit.
Richard Holman +2 more
openaire +3 more sources
Holographic Schwinger-Keldysh effective field theories
Journal of High Energy Physics, 2019 We construct a holographic dual of the Schwinger-Keldysh effective action for the dissipative low-energy dynamics of relativistic charged matter at strong coupling in a fixed thermal background.
Jan de Boer +2 more
doaj +1 more source
Effective field theories with instantons [PDF]
Nuclear Physics B, 1994 We explain how nonperturbative effects can be systematically included when constructing an effective field theory. We concentrate in particular on the matching calculation, by which a low energy theory without a heavy particle degree of freedom is matched onto the full theory.
Georgi, Howard, Osofsky, Samuel T.
openaire +4 more sources
Effective field theories as Lagrange spaces
Journal of High Energy Physics, 2023 We present a formulation of scalar effective field theories in terms of the geometry of Lagrange spaces. The horizontal geometry of the Lagrange space generalizes the Riemannian geometry on the scalar field manifold, inducing a broad class of affine ...
Nathaniel Craig +3 more
doaj +1 more source
Introduction to effective field theory [PDF]
Nuclear Physics A, 2001 An introduction to methods of effective field theory is given. Examples are presented, including Rayleigh scattering from nonrelativistic quantum mechnics, chiral perturbation theory/QCD as well as electromagnetic and weak interactions of nucleons.
openaire +4 more sources
Effective Field Theory of 3He [PDF]
Few-Body Systems, 2010 3He and the triton are studied as three-body bound states in the effective field theory without pions. We study 3He using the set of integral equations developed by Kok et al. which includes the full off-shell T-matrix for the Coulomb interaction between the protons.
Ando, Shung Ichi, Birse, Michael C.
openaire +8 more sources
Operator dimensions from moduli
Journal of High Energy Physics, 2017 We consider the operator spectrum of a three-dimensional N = 2 $$ \mathcal{N}=2 $$ superconformal field theory with a moduli space of one complex dimension, such as the fixed point theory with three chiral superfields X, Y, Z and a superpotential W = XYZ.
Simeon Hellerman +2 more
doaj +1 more source
Derivation of effective field theories [PDF]
Physical Review E, 2008 A general self-consistency approach allows a thorough treatment of the corrections to the mean-field approximation (MFA). The natural extension of standard MFA with the help of a cumulant expansion leads to a new point of view on the effective field theories. The proposed approach can be used for a systematic treatment of fluctuation effects of various
openaire +4 more sources
Amplitude/operator basis in chiral perturbation theory
Journal of High Energy Physics, 2023 We establish a systematic construction of the on-shell amplitude/operator basis for Chiral Perturbation Theory (ChPT) in D = 4 spacetime dimensions and with an arbitrary number of flavors N f .
Ian Low +3 more
doaj +1 more source