Zobrazeno 1 - 10
of 269
pro vyhledávání: '"Dillig, M."'
Autor:
Dillig, M.
We investigate OZI violation in near-threshold omega and phi production in the pp system. Assuming ideal omega/phi mixing (corrections are estimated), the energy dependence of the ratio R(omega/phi) is analyzed in a perturbative quark-gluon exchange
Externí odkaz:
http://arxiv.org/abs/nucl-th/0604064
Autor:
Dillig, M.
We derive covariant wave functions for hadrons composed of two constituents for arbitrary Lorentz boosts. Focussing explicitly on baryons as quark-diquark systems, we reduce their manifestly covariant Bethe-Salpeter equation to covariant 3-dimensiona
Externí odkaz:
http://arxiv.org/abs/nucl-th/0604060
Autor:
Dillig, M.
We extent the standard approach of dimensional regularization of Feynman diagrams: we replace the transition to lower dimensions by a 'natural' cut-off regulator. Introducing an external regulator of mass Lambda^(2e), we regain in the limit e -> 0 an
Externí odkaz:
http://arxiv.org/abs/nucl-th/0604062
Autor:
Dillig, M., Schott, M.
The energy dependence of the reactions pp -> p Lambda K+ and pp -> p Sigma0 K+ and the ratio R(Lambda/Sigma0} is studied in a constituent quark-gluon model, including the excitation of the baryon resonances N*(1650), N*(1710) and N*(1720) near the La
Externí odkaz:
http://arxiv.org/abs/nucl-th/0604059
Autor:
Dillig, M.
We analyze recent experimental information on the excitation of the Theta+(1540) pentaquark in the hadronic reaction pp -> p Sigma+ K0. Upon describing the conventional production process - which serves as a normalization - in a meson exchange model,
Externí odkaz:
http://arxiv.org/abs/nucl-th/0604065
Autor:
Dillig, M., Rothleitner, C.
Publikováno v:
Int.J.Mod.Phys.E16:69-80,2007
We investigate the Lorentz contraction of a deuteron in flight. Our starting point is the Blankenbecler-Sugar projection of the Bethe-Salpeter equation to a 3-dimensional quasi potential equation, wqhich we apply for the deuteron bound in an harmonic
Externí odkaz:
http://arxiv.org/abs/nucl-th/0604063
Publikováno v:
Int.J.Mod.Phys.E16:81-96,2007
We address an actual problem of baryon-resonance dominated meson-exchange processes in the low GeV regime, i.e. the phase and the structure of meson-NN* transition vertices. Our starting point is a quark-diquark model for the baryons (obeying approxi
Externí odkaz:
http://arxiv.org/abs/nucl-th/0604061
Autor:
Dillig, M., Rothleitner, C.
We analyze recent inclusive data on K+ production in proton induced Lambda-multi nucleon knock out on Carbon 12. We describe collective effects among the incoming p and bound nucleons in a pi, rho rescattering model via the excitation of various bary
Externí odkaz:
http://arxiv.org/abs/nucl-th/0604056
Autor:
Dillig, M., Schott, M.
Publikováno v:
Phys.Rev.C75:067001,2007; Erratum-ibid.C76:019903,2007
We investigate colorless (mesonic) 3q-q qbar components in the nucleon and the Roper resonance N*(1440). Starting from constituent quarks and gluons we estimate the excitation of quark-antiquark pairs in a gluon exchange model with the strong couplin
Externí odkaz:
http://arxiv.org/abs/nucl-th/0405063
Autor:
Dillig, M.
A Comment on the letter by V. Koptev, et al. - Phys. Rev. Lett. 87 (2001) 022301.
Comment: 3 Pages, 1 figure (epsfig)
Comment: 3 Pages, 1 figure (epsfig)
Externí odkaz:
http://arxiv.org/abs/nucl-th/0202068