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Adding flavour to the S-matrix bootstrap
(2018-12-01)
We explore the S-matrices of gapped, unitary, Lorentz invariant quantum field theories with a global O(N) symmetry in 1+1 dimensions. We extremize various cubic and quartic couplings in the two-to-two scattering amplitudes ...
On the generalized eigenvalue method for energies and matrix elements in lattice field theory
(INT SCHOOL ADVANCED STUDIES, 2009)
We discuss the generalized eigenvalue problem for computing energies and matrix elements in lattice gauge theory, including effective theories such as HQET. It is analyzed how the extracted effective energies and matrix ...
Renormalization of singular potentials and power counting
(Academic Press Inc. Elsevier B.V., 2008-06-01)
We use a toy model to illustrate how to build effective theories for singular potentials. We consider a central attractive 1/r(2) potential perturbed by a 1/r(4) correction. The power-counting rule, an important ingredient ...
Renormalization of singular potentials and power counting
(Academic Press Inc. Elsevier B.V., 2008-06-01)
We use a toy model to illustrate how to build effective theories for singular potentials. We consider a central attractive 1/r(2) potential perturbed by a 1/r(4) correction. The power-counting rule, an important ingredient ...
Heavy flavor relaxation in a hadronic medium
(2013)
Charm and bottom transport coefficients in a medium constituted of light mesons, such as is formed in the hadronic phase of heavy-ion collisions, are obtained within an effective field theory approach implementing heavy-quark ...
Opacity from Loops in AdS
(2021-02-01)
We investigate how quantum dynamics affects the propagation of a scalar field in Lorentzian AdS. We work in momentum space, in which the propagator admits two spectral representations (denoted “conformal” and “momentum”) ...
A relação entre arte e sociedade à luz do conceito de autonomia estética de adorno
(2016-01-01)
This article analyzes the manner in which Adorno’s concept of aesthetic autonomy is manifested in the relationship between society and art. The following topics are discussed: the separation between theory and praxis, the ...
Effective Complexity: In Which Sense is It Informative?
(Springer, 2020-09)
This work responds to a criticism of effective complexity made by James McAllister, according to which such a notion is not an appropriate measure for information content. Roughly, effective complexity is focused on the ...