Renormalisation of g-boson Effects in an s-d-g Boson Model
نویسندگان
چکیده
منابع مشابه
Boson induced s-wave pairing in dilute boson-fermion mixtures
We show that in dilute boson-fermion mixtures with fermions in two internal states, even when the bare fermion-fermion interaction is repulsive, the exchange of density fluctuations of the Bose condensate may lead to an effective fermion-fermion attraction, and thus to a Cooper instability in the s-wave channel. We give an analytical method to derive the associated Tc in the limit where the pho...
متن کاملEffects of boson dispersion in fermion-boson coupled systems
We study the nonlinear feedback in a fermion-boson system using an extension of dynamical mean-field theory and the quantum Monte Carlo method. In the perturbative regimes ~weak-coupling and atomic limits! the effective interaction among fermions increases as the width of the boson dispersion increases. In the strong-coupling regime away from the antiadiabatic limit, the effective interaction d...
متن کاملFluctuation Effects by Boson Dispersion in Fermion-boson Coupled Systems
Nonlinear feedback effects due to dispersive bosons are studied in fermion-boson coupled systems by using an extension of dynamical mean-field theory. In the nonperturbative regime, strong coupling and nonadiabaticity reduce effective interaction between fermions as the width of boson dispersion increases. The boson field is completely softened at the crossover to this regime. The softening is ...
متن کاملChiral color symmetry and possible G′-boson effects at the Tevatron and LHC
A gauge model with chiral color symmetry is considered and possible effects of the color G-boson octet predicted by this symmetry are investigated in dependence on two free parameters, the mixing angle θG and G ′ mass mG′ . The allowed region in the mG′ − θG plane is found from the Tevatron data on the cross section σtt̄ and forward-backward asymmetry A pp̄ FB of the tt̄ production. The mass limit...
متن کاملThe boson-boson bound state in the massive Schwinger model
We use (fermion) mass perturbation theory for the massive Schwinger model to compute the boson-boson bound state mass in lowest order. For small fermion mass the lowest possible Fock state turns out to give the main contribution and leads to a second order result for the bound state mass. ∗)permanent address: Institut für theoretische Physik, Universität Wien Boltzmanngasse 5, 1090 Wien, Austri...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Australian Journal of Physics
سال: 1988
ISSN: 0004-9506
DOI: 10.1071/ph880633