Zobrazeno 1 - 10
of 261
pro vyhledávání: '"Borasoy, B."'
Publikováno v:
Eur.Phys.J.A34:161-183,2007
We present a gauge invariant approach to photoproduction of mesons on nucleons within a chiral unitary framework. The interaction kernel for meson-baryon scattering is derived from the chiral effective Lagrangian and iterated in a Bethe-Salpeter equa
Externí odkaz:
http://arxiv.org/abs/0709.3181
Autor:
Borasoy, B., Nißler, R.
Publikováno v:
Eur.Phys.J.A33:95-106,2007
The decays eta, eta-prime --> pi+ pi- l+ l- (with l = e, mu) are investigated within a chiral unitary approach which combines the chiral effective Lagrangian with a coupled-channels Bethe-Salpeter equation. Predictions for the decay widths and spectr
Externí odkaz:
http://arxiv.org/abs/0705.0954
Autor:
Borasoy, B.
A brief introduction to chiral perturbation theory, the effective field theory of quantum chromodynamics at low energies, is given.
Comment: 26 pages, 11 figures. Lectures given at the summer school ISSSMB 2006 in Akyaka, Turkey, September 2006
Comment: 26 pages, 11 figures. Lectures given at the summer school ISSSMB 2006 in Akyaka, Turkey, September 2006
Externí odkaz:
http://arxiv.org/abs/hep-ph/0703297
Publikováno v:
Phys.Lett.B643:41-45,2006
The claim that the light quark mass ratio (m_d - m_u)/m_s can be extracted from the decay width ratio Gamma(eta' -> pi^0 pi^+ pi^-)/Gamma(eta' -> eta pi^+ pi^-) is critically investigated within a U(3) chiral unitary framework. The influence of the r
Externí odkaz:
http://arxiv.org/abs/hep-ph/0609010
Publikováno v:
Phys.Lett.B641:294-300,2006
We analyze the quark mass dependence of the Roper mass to one-loop order in relativistic baryon chiral perturbation theory. The loop integrals are evaluated using infrared regularization which preserves chiral symmetry and establishes a chiral counti
Externí odkaz:
http://arxiv.org/abs/hep-lat/0608001
Publikováno v:
Phys.Rev.C74:055201,2006
The strong K^- p scattering length is extracted within chiral SU(3) unitary approaches from a very large variety of fits to low-energy K^- p scattering data. Very good overall agreement with available scattering data is obtained and the resulting sca
Externí odkaz:
http://arxiv.org/abs/hep-ph/0606108
Autor:
Borasoy, B., Krebs, H.
Publikováno v:
Nucl.Phys. B748 (2006) 1-23
We present a method to calculate to very high precision the coefficients of the divergences occuring in two-loop diagrams for a massive scalar field on the lattice. The approach is based on coordinate space techniques and extensive use of the precise
Externí odkaz:
http://arxiv.org/abs/hep-lat/0602014
Publikováno v:
Phys.Rev.Lett. 96 (2006) 199201
It has recently been claimed by Oller et al. [PRL 95 (2005) 172502] that the DEAR kaonic hydrogen data can be reconciled with K^- p scattering data in a chiral unitary approach. In this comment we demonstrate that the proposed solution violates funda
Externí odkaz:
http://arxiv.org/abs/hep-ph/0512279
Autor:
Borasoy, B., Nissler, R.
Publikováno v:
ActaPhys.Slov.56:319-326,2006
Various decays of eta and eta-prime 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 s- and p-wave interaction
Externí odkaz:
http://arxiv.org/abs/hep-ph/0511290
Autor:
Borasoy, B., Nissler, R.
Publikováno v:
Eur.Phys.J. A26 (2005) 383-398
The hadronic decays eta, eta-prime -> 3 pi and eta-prime -> eta pi pi 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 d
Externí odkaz:
http://arxiv.org/abs/hep-ph/0510384