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14 papers · 1 filter
Systematic Low-Energy Effective Field Theory for Electron-Doped Antiferromagnets
C. Brügger, C. P. Hofmann, F. Kämpfer +3
In contrast to hole-doped systems which have hole pockets centered at , in lightly electron-doped antiferromagnets the charged quasiparticles resid…
Rotor Spectra, Berry Phases, and Monopole Fields: from Antiferromagnets to QCD
S. Chandrasekharan, F. -J. Jiang, M. Pepe +1
The order parameter of a finite system with a spontaneously broken continuous global symmetry acts as a quantum mechanical rotor. Both antiferromagnets with a spontaneously broken…
On the dispersion theory of scattering
H. Leutwyler
Recent developments in low energy pion physics are reviewed, emphasizing the strength of dispersion theory in this context. As an illustration of the method, I discuss some consequ…
Chiral logarithms to five loops
Moritz Bissegger, Andreas Fuhrer
We investigate two specific Green functions in the framework of chiral perturbation theory. We show that, using analyticity and unitarity, their leading logarithmic singularities c…
Aspects of radiative K^+_e3 decays
Bastian Kubis, Eike H. Müller, Jürg Gasser +1
We re-investigate the radiative charged kaon decay K+- --> pi0 e+- nu_e gamma in chiral perturbation theory, merging the chiral expansion with Low's theorem. We thoroughly analyze…
The photophoretic sweeping of dust in transient protoplanetary disks
O. Krauss, G. Wurm, O. Moussis +3
Protoplanetary disks start their lives with a dust free inner region where the temperatures are higher than the sublimation temperature of solids. As the star illuminates the inner…