Zobrazeno 1 - 10
of 282
pro vyhledávání: '"Tsapalis, A."'
Publikováno v:
Phys. Rev. D 93, 085003 (2016)
We investigate Non-Linear Plane-Wave solutions of the classical Minkowskian Yang-Mills (YM) equations of motion. By imposing a suitable ansatz which solves Gauss' law for the $SU(3)$ theory, we derive solutions which consist of Jacobi elliptic functi
Externí odkaz:
http://arxiv.org/abs/1603.01858
Autor:
Tsagkarakis, C. E., Achilleos, V., Diakonos, F. K., Frantzeskakis, D. J., Katsimiga, G. C., Maintas, X. N., Manousakis, E., Tsapalis, A.
Publikováno v:
PoS CORFU2014 (2015) 122
We study the classical dynamics of the Abelian Higgs model employing an asymptotic multiscale expansion method, which uses the ratio of the Higgs to the gauge field amplitudes as a small parameter. We derive an effective nonlinear Schr\"{o}dinger equ
Externí odkaz:
http://arxiv.org/abs/1508.06209
Publikováno v:
Phys.Lett. B763 (2016) 139-144
We propose a quasi-particle model for the thermodynamic description of the gluon plasma which takes into account non-abelian characteristics of the gluonic field. This is accomplished utilizing massive non-linear plane wave solutions of the classical
Externí odkaz:
http://arxiv.org/abs/1501.01032
Autor:
Achilleos, V., Diakonos, F. K., Frantzeskakis, D. J., Katsimiga, G. C., Maintas, X. N., Manousakis, E., Tsagkarakis, C. E., Tsapalis, A.
Publikováno v:
Phys. Rev. D 88, 045015 (2013)
We study the classical dynamics of the Abelian Higgs model employing an asymptotic multiscale expansion method, which uses the ratio of the Higgs to the gauge field amplitudes as a small parameter. We derive an effective nonlinear Schrodinger equatio
Externí odkaz:
http://arxiv.org/abs/1306.3868
A method suitable for extracting resonance parameters of unstable baryons in lattice QCD is examined. The method is applied to the strong decay of the Delta to a pion-nucleon state, extracting the pion-nucleon - Delta coupling constant and Delta deca
Externí odkaz:
http://arxiv.org/abs/1305.6081
Autor:
Alexandrou, C., Gregory, E. B., Korzec, T., Koutsou, G., Negele, J. W., Sato, T., Tsapalis, A.
We present a lattice QCD calculation of the $\Delta(1232)$ matrix elements of the axial-vector and pseudoscalar currents. The decomposition of these matrix elements into the appropriate Lorentz invariant form factors is carried out and the techniques
Externí odkaz:
http://arxiv.org/abs/1304.4614
Autor:
Alexandre, J., Tsapalis, A.
Using a non-perturbative approximation for the partition function of a complex scalar model, which features spontaneous symmetry breaking, we explicitly derive the flattening of the effective potential in the region limited by the minima of the bare
Externí odkaz:
http://arxiv.org/abs/1211.0921
Autor:
Achilleos, V., Diakonos, F. K., Frantzeskakis, D. J., Katsimiga, G. C., Maintas, X. N., Tsagkarakis, C. E., Tsapalis, A.
We study the classical dynamics of SU(2)-Higgs field theory using multiple scale perturbation theory. In the spontaneously broken phase, assuming small perturbations of the Higgs field around its vacuum expectation value, we derive a nonlinear Schroe
Externí odkaz:
http://arxiv.org/abs/1112.3811
Autor:
Alexandrou, C., Gregory, E. B., Korzec, T., Koutsou, G., Negele, J. W., Sato, T., Tsapalis, A.
We present the first calculation on the $\Delta$ axial-vector and pseudoscalar form factors using lattice QCD. Two Goldberger-Treiman relations are derived and examined. A combined chiral fit is performed to the nucleon axial charge, N to $\Delta$ ax
Externí odkaz:
http://arxiv.org/abs/1106.6000
Publikováno v:
Phys.Rev.D83:014501,2011
We calculate the electromagnetic, axial and pseudo-scalar form factors of the Nucleon to $\Delta(1232)$ transition using two dynamical light degenerate quarks and a dynamical strange quark simulated with the domain wall fermion action. Results are ob
Externí odkaz:
http://arxiv.org/abs/1011.3233