Filters
Results 1 - 1 of 1
Results 1 - 1 of 1.
Search took: 0.016 seconds
Shifman, M.A.; Vainshtein, A.I.; Zakharov, V.I.
Gosudarstvennyj Komitet po Ispol'zovaniyu Atomnoj Ehnergii SSSR, Moscow. Inst. Teoreticheskoj i Ehksperimental'noj Fiziki1978
Gosudarstvennyj Komitet po Ispol'zovaniyu Atomnoj Ehnergii SSSR, Moscow. Inst. Teoreticheskoj i Ehksperimental'noj Fiziki1978
AbstractAbstract
[en] The QCD sum rules derived earlier are applied to evaluate the leptonic widths and masses of the π, rho, A1 mesons (the very existence of resonances is taken as granted, however). The mass scale is set by the power corrections to asymptotic freedom which are due to nonperturbative effects in QCD. The main results are expressions for the p → e+e- and π → μν decay widths and a relation between the mass and the power corrections. Estimates of the A1 leptonic width are also presented. It is argued that the observed difference in the spectra in the in the vector and axial-vector channels (π - rho - A1 system) provides a very clean test of the power corrections
Primary Subject
Source
1978; 48 p; 14 refs.; 6 figs.
Record Type
Report
Literature Type
Numerical Data
Report Number
Country of publication
ANTILEPTONS, ANTIMATTER, ANTIPARTICLES, BASIC INTERACTIONS, BOSONS, DATA, DATA FORMS, DECAY, ELEMENTARY PARTICLES, EQUATIONS, FERMIONS, FIELD THEORIES, HADRONS, INFORMATION, INTERACTIONS, LEPTONS, MATTER, MESON RESONANCES, MESONS, NUMERICAL DATA, PARTICLE DECAY, QUANTUM FIELD THEORY, RESONANCE PARTICLES, SPECTRA, WEAK INTERACTIONS, WEAK PARTICLE DECAY
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue