Pions and excited scalars in Minkowski space DSBSE formalism

Autor:	Sauli, V.
Rok vydání:	2014
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Lattice
Zdroj:	Int. Jour. of Theor. Phys. 54, pp 4131, 2015
Druh dokumentu:	Working Paper
DOI:	10.1007/s10773-015-2525-2
Popis:	We present the solution of Schwinger-Dyson and Bethe-Salpeter equation (BSE) for a light flawour non-singlet spinless meson in Minkowski space. The equations are solved in momentum space without the use of the auxiliary Euclidean space. To exhibit that Minkowski space non perturbative calculations are actually possible is the main purpose of presented paper. According to confinement, the quark propagator is regular in momentum space, which allows us to look for the BSE solution directly in the Minkowski momentum space. We find the Minkowski space solution for confining theories is not only numerically accessible, but also provides a reasonable description of the pseudoscalar meson system. However, in the case of scalar mesons, the model is less reliable and we get more extra light states then observed experimentally. Comment: 9 pages
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1411.2568 Zobrazit plný text záznamu View this record from Arxiv