نتایج جستجو برای: efts
تعداد نتایج: 145 فیلتر نتایج به سال:
BACKGROUND GRACE risk score (GS) is a scoring system which has a prognostic significance in patients with non-ST segment elevation myocardial infarction (non-STEMI). OBJECTIVE The present study aimed to determine whether end-systolic or end-diastolic epicardial fat thickness (EFT) is more closely associated with high-risk non-STEMI patients according to the GS. METHODS We evaluated 207 pati...
A bstract We renormalize massless scalar effective field theories (EFTs) to higher loop orders and in the EFT expansion. To facilitate calculations with R* renormalization method, we construct suitable operator bases using Hilbert series related ideas commutative algebra conformal representation theory, including their novel application off-shell correlation functions. obtain new results rangin...
A bstract We investigate the phenomenon of second sound in various states matter from perspective non-equilibrium effective field theory (EFT). In particular, for each state considered, we find that at least two (though sometimes multiple) qualitatively different EFTs exist finite temperature such there is always one EFT with a propagating second-sound wave and no wave. To aid construction thes...
We study the phase diagram of dense quark matter with an emphasis on the role of the strange quark mass. Our approach is based on two effective field theories (EFTs). The first is an EFT that describes quark quasi-particles near the Fermi surface. This EFT is valid at energies small compared to the chemical potential. The second is an EFT for the Goldstone modes in the paired phase. We find tha...
A bstract We study axion effective field theories (EFTs), with a focus on couplings to massive chiral gauge fields. investigate the EFT interactions that participate in processes an and two bosons, we show that, when fields are present, such do not entirely originate from usual anomalous terms. illustrate this both at level by matching UV-complete theories. In order assess consistency of Peccei...
Positivity bounds without boosts: New constraints on low energy effective field theories from the UV
We derive new positivity bounds for low-energy effective field theories (EFTs) that are not invariant under Lorentz boosts. ``Positivity bounds'' the manifestation of certain fundamental properties in UV---to date, they have been used to constrain a wide variety EFTs; however, since existing require invariance directly applicable when this symmetry is broken, such as most cosmological and conde...
A bstract We initiate the classification of nonrelativistic effective field theories (EFTs) for Nambu-Goldstone (NG) bosons, possessing a set redundant, coordinate-dependent symmetries. Similarly to relativistic case, such EFTs are natural candidates “exceptional” theories, whose scattering amplitudes feature an enhanced soft limit, that is, scale with higher power momentum at long wavelengths ...
A bstract Perturbative quantum corrections to primordial power spectra are important for testing the robustness and regime of validity inflation as an effective field theory. Although this has been done extensively density spectrum (and, some extent, tensor spectrum) using loop corrections, we do so in open system approach problem. Specifically, calculate first-order gravitational wave due (cub...
We examine effective field theories (EFTs) with a continuum sector in the presence of gravity. first explain, via arguments based on central charge and species scale, that an EFT free cannot consistently couple to standard (i.e. 4D Einstein) It follows EFTs or nearly-free must either have finite number degrees freedom nonstandard The latter claim is realized for holographically-defined models. ...
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