منابع مشابه
Meson mass spectrum and OPE: matching to the large-Nc QCD∗†
The relations between masses and decay constants of variety of meson resonances in the energy range 0–3 GeV are verified from the string-like, linear mass spectrum for vector, axial-vector, scalar and pseudoscalar mesons with a universal slope. The way to match the universality with the Operator Product Expansion (OPE) is proposed. The necessity of small deviations from linearity in parameteriz...
متن کاملMatching Regge Theory to the OPE
The spectra of masses and decay constants for non-strange meson resonances in the energy range 0–2.5 GeV is analyzed. It is known from meson phenomenology that for given quantum numbers these spectra approximately follow linear trajectories with a universal slope. These facts can be understood in terms of an effective string description for QCD. For light meson states the trajectories deviate n...
متن کاملMeson Resonances
Bubble chambers have played an immensely important role in developing our understanding of meson resonances. As a matter of fact, if we look at the four lowest lying meson nonets: 0 +, 1-, 2 ++, and 1 ++, all the 27 states in the last three nonets were discovered via the bubble chamber technique. In addi t ion , their spins and par i t ies were also determined in bubble chamber experiments. Bub...
متن کاملVery low energy matching of effective meson theories with QCD
A simple matching procedure is proposed to extract constraints on effective meson theories. In this way, a QCD prediction for the pion decay constant is found, Fπ = 2mπ/π ≈ 90 MeV. The same procedure also determines other mesonic observables, like the decay width of the sigma meson to two photons. Finally, some information which can be gained about the hadronic light-by-light contributions to t...
متن کاملMeson and Baryon resonances
In this talk I review recent advances on the structure of the meson and baryon resonances which can be dynamically generated from the interaction of mesons or mesons and baryons. Particular emphasis is put on results involving vector mesons, which bring new light into the nature of some of the observed higher mass mesons and baryons and make predictions for new states.
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ژورنال
عنوان ژورنال: International Journal of Modern Physics A
سال: 2006
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x0603223x