Lehmann-Symanzik-Zimmermann formalism in the one-boson Lee model.
One-boson Lee model of solvable field theory with nontrivial charge and mass renormalization as example of Lehmann-Symanzik-Zimmermann formalism
FIELD THEORY↗
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Charge transfer polarisation wave and carrier pairing in the high T(sub c) copper oxides
The High T(sub c) oxides are highly polarizable materials and are charge transfer insulators. The charge transfer polarization wave formalism is developed in these oxides. The dispersion relationships due to long range dipole-dipole interaction of a charge transfer dipole lattice are obtained in 3-D and 2-D. These are high frequency bosons and their coupling with carriers is weak and antiadiabatic in nature. As a result, the mass renormalization of the carriers is negligible in complete contrast to conventional electron-phonon interaction, that give polarons and bipolarons. Both bound and superconducting pairing is discussed for a model Hamiltonian valid in the antiadiabatic regime, both in 3-D and 2-D. The stability of the charge transfer dipole lattice has interesting consequences that are discussed.
Chakraverty, B. K.↗
Resonant scattering and charm showers in ultrahigh-energy neutrino interactions
Electron antineutrinos with energy of about 7 x 10 to the 6th GeV have much-enhanced cross sections due to W-boson production off electrons. Possible signals due to cosmic-ray sources are estimated. Higher-energy antineutrinos can efficiently produce a W accompanied by radiation. Another possibility, which could lead to shadowing at modest depths, is resonant production of a charged Higgs particle. The importance of muon production by charm showers in rock is pointed out.
Wilczek, F.↗