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9 papers · 2 filters
Renormalon's Contribution to Effective Couplings
Hiroshi Suzuki
When an asymptotically non-free theory possesses a mass parameter, the ultraviolet (UV) renormalon gives rise to non-perturbative contributions to dimension-four operators and dime…
Duality in Landau-Zener-Stueckelberg potential curve crossing
Kazuo Fujikawa, Hiroshi Suzuki
It is pointed out that there exists an interesting strong and weak duality in the Landau-Zener-Stueckelberg potential curve crossing. A reliable perturbation theory can thus be for…
Observing Quantum Tunneling in Perturbation Series
Hiroshi Suzuki, Hirofumi Yasuta
It is well-known that the quantum tunneling makes conventional perturbation series non-Borel summable. We use this fact reversely and attempt to extract the decay width of the fals…
On the Three-Point Couplings in Toda Field Theory
T. Fujiwara, H. Igarashi, Y. Takimoto
Correlation functions of Toda field vertices are investigated by applying the method of integrating zero-mode developed for Liouville theory. We generalize the relations among the…
Resummation of Vacuum Bubble Diagrams in Gaussian Propagator Model
Hirofumi Yasuta
An imaginary part of the false-vacuum energy density in a metastable system, i.e., the decay width due to quantum tunneling, might be reproduced by Borel resummation of vacuum bubb…
Manifestly Gauge Covariant Treatment of Lattice Chiral Fermions. II
Kiyoshi Okuyama, Hiroshi Suzuki
We propose a new formulation of chiral fermions on a lattice, on the basis of a lattice extension of the covariant regularization scheme in continuum field theory. The species doub…