Keresés
1 találatból megjelenítve: 1-11
Cím: Finite temperature spectral functions of the linear O(N) model at large N applied to the pi - sigma system
Szerző: ; ;
Dátum: 2002
Feltöltve: 2020-08-07
(2002)
The thermal evolution of the spectral densities derivable from the two-point functions of the elementary and the quadratic composite fields of the O(N) model is studied in the isosinglet channel and in the broken symmetry ...
Cím: High energy neutrinos and photons from curvature pions in magnetars
Szerző: ; ; ;
Dátum: 2008
Feltöltve: 2020-08-11
(2008)
We discuss the relevance of the curvature radiation of pions in
strongly magnetized pulsars or magnetars, and their implications
for the production of TeV energy neutrinos detectable by cubic
kilometer scale detectors, ...
Cím: Spontaneously broken ground states of the U(n) L×U(n) R linear sigma model at large n
Szerző: ;
Dátum: 2011
Feltöltve: 2020-08-11
(2011)
Symmetry breaking patterns of the U(n) L×U(n) R symmetric meson model are investigated in a formulation involving three auxiliary composite fields. The effective potential is constructed at leading order in the 1/n expansion ...
Cím: Universal threshold enhancement
Szerző: ; ;
Dátum: 2003
Feltöltve: 2020-08-07
(2003)
By assuming certain analytic properties of the propagator, it is shown that universal features of the spectral function, including threshold enhancement, arise if a pole describing a particle at high temperature approaches ...
Cím: Finite temperature spectral function of the sigma meson from large N expansion
Szerző: ; ;
Dátum: 2003
Feltöltve: 2020-08-07
(2003)
Cím: Phantom field fluctuation induced Higgs effect
Szerző: ;
Dátum: 2006
Feltöltve: 2020-08-07
(2006)
Symmetry breaking solutions are investigated in the N->infinity limit for the ground state of a system consisting of a Lorentz-scalar, N component "phantom" field and an O (N) singlet. The most general form of O(N) x Z(2) ...
Cím: T-μ phase diagram of the chiral quark model from a large flavor number expansion
Szerző: ; ; ;
Dátum: 2004
Feltöltve: 2020-08-07
(2004)
The chiral phase boundary of strong matter is determined in the T-mu plane from the chiral quark model, applying a non-perturbatively renormalised treatment, involving chains of pion-bubbles and 1-loop fermion contributions. ...
Cím: Analytic determination of the T - mu phase diagram of the chiral quark model
Szerző: ; ; ;
Dátum: 2005
Feltöltve: 2020-08-07
(2005)
Using a gap equation for the pion mass a non-perturbative method is given for solving the chiral quark-meson model in the chiral limit at the lowest order in the fermion contributions encountered in a large-Nf approximation. ...
Cím: The nature of the soft excitation near the end-point of the QCD
Szerző: ; ; ;
Dátum: 2005
Feltöltve: 2020-08-07
(2005)
Using a large flavor number expansion and a gap equation for the
pion mass the chiral quark-meson model is solved at the lowest
order in the fermion contributions. In the chiral limit the
tricritical point (TCP) is ...
Cím: Mapping the boundary of the first order finite temperature restoration of chiral symmetry in the mpi - mK -plane with a linear sigma model
Szerző: ; ; ;
Dátum: 2005
Feltöltve: 2020-08-07
(2005)
The phase diagram of the three-flavor QCD is mapped out in the low mass corner of the (m(pi)-m(K))-plane with help of the SU(L)(3)xSU(R)(3) linear sigma model (L sigma M). A novel zero temperature parametrization is proposed ...
Cím: Non-Gaussian fixed points in fermionic field theories without auxiliary Bose fields
Szerző: ; ;
Dátum: 2015
Feltöltve: 2022-05-16
(2015)