نتایج جستجو برای: meson field theory

تعداد نتایج: 1476755  

Journal: :Progress of Theoretical Physics 1949

Journal: :Progress of Theoretical Physics Supplement 1991

Journal: :Journal of High Energy Physics 2023

We study the ground state of low energy dense QCD with assumption chiral condensates quarks. Under an external magnetic field, mesons could form soliton lattices via anomaly. For such scenarios, we present a unified description pions and $\eta$ meson $U(2)$ field in framework perturbation theory. Our result shows is mixture magnetized domain walls formed by neutral pion $\pi^0$ when they coexis...

2005
R. Nißler

The hadronic decays η, η′ → 3π and η′ → ηππ are investigated within the framework of U(3) chiral effective field theory in combination with a relativistic coupled-channels approach. Final state interactions are included by deriving sand p-wave interaction kernels for meson-meson scattering from the chiral effective Lagrangian and iterating them in a Bethe-Salpeter equation. Very good overall ag...

2005
C. R. Allton W. Armour D. B. Leinweber

Using the finite-range regularisation (FRR) of chiral effective field theory, the chiral extrapolation formula for the vector meson mass is derived for the case of partially-quenched QCD. We re-analyse the dynamical fermion QCD data for the vector meson mass from the CP-PACS collaboration. A global fit, including finite lattice spacing effects, of all 16 of their ensembles is performed. We stud...

1992
Oscar F. Hernández

The matrix element which determines the B meson decay constant can be measured on the lattice using an effective field theory for heavy quarks. Various discretizations of the heavy-light bilinears which appear in this and other B decay matrix elements are possible. The heavy-light bilinear currently used for the determination of the B meson decay constant on the lattice suffers a substantial on...

1999
Y. Tsue

We calculate the lifetime of the collective isospin rotating solutions which have been found recently in the case a quantum N-component meson field with exact O(N) symmetry. For this purpose we take into account the small breaking of the O(N) symmetry associated to the non vanishing mass of the pion. This term induces a coupling between collective rotations and intrinsic meson excitations. We e...

رجبی, علی‌اکبر , صالحی, نسرین ,

  Meson is composed of one quark and one antiquark moving under the effect of confinement, oscillating and color potentials. Since quarks are particles with spin , there is a spin-spin interaction potential. Also we have isospins for u and d quarks and we can consider related potentials on isospin-isospin and spin-isospin effects. By comparing the given meson spectrum with the amount calculated...

1993
Kazuhiro TANAKA

The energy spectrum of nucleons in high-density nuclear matter is investigated in the framework of relativistic meson-nucleon manybody theory, employing the 1/N expansion method. The coupling of the nucleon with the particle-hole excitations in the medium flattens the spectra in the vicinity of the Fermi surface. The effect grows logarithmically for increasing density and eventually leads to in...

Journal: :Progress of Theoretical Physics 1951

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