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30 papers · 1 filter
Kaon-Nucleon scattering lengths from the experiments on kaonic hydrogen and kaonic deuterium
Akaki Rusetsky
Within the framework of a low-energy effective field theory we consider the procedure of extraction of the S-wave kaon-nucleon scattering lengths a0 and a1 from a combined fit to t…
Space-time in light of Karolyhazy uncertainty relation
Michael Maziashvili
General relativity and quantum mechanics provide a natural explanation for the existence of dark energy with its observed value and predict its dynamics. Dark energy proves to be n…
Chiral expansion of the nucleon mass to order q^6
M. R. Schindler, D. Djukanovic, J. Gegelia +1
We present the results of a complete two-loop calculation at order q^6 of the nucleon mass in manifestly Lorentz-invariant chiral perturbation theory. The renormalization is perfor…
Long-Range Effects in Layered Spin Structures
Alessandro Campa, Ramaz Khomeriki, David Mukamel +1
We study theoretically layered spin systems where long-range dipolar interactions play a relevant role. By choosing a specific sample shape, we are able to reduce the complex Hamil…
Axial, induced pseudoscalar, and pion-nucleon form factors in manifestly Lorentz-invariant chiral perturbation theory
M. R. Schindler, T. Fuchs, J. Gegelia +1
We calculate the nucleon form factors G_A and G_P of the isovector axial-vector current and the pion-nucleon form factor G_piN in manifestly Lorentz-invariant baryon chiral perturb…
Band-Insulator-Metal-Mott-Insulator transition in the half--filled ionic-Hubbard chain
G. I. Japaridze, R. Hayn, P. Lombardo +1
We investigate the ground state phase diagram of the half-filled repulsive Hubbard model in the presence of a staggered ionic potential , using the continuum-limi…