Production of charmed-meson pairs in electron-positron annihilation
نویسندگان
چکیده
منابع مشابه
Charmed and Strange.baryon Production in 29 Gev Electron Positron Annihilation*
Baryon production is one of the least understood areas of hadron production in electron positron collisions. Early models of hadronization predicted that very few baryons should be produced. However, experiments have shown a very substantial rate of baryon production, and many different models have been proposed to explain this. One way to test these models, and to further probe the hadronizati...
متن کاملCha&&med Meson Production in Electron-positron Annihilation*
Charmed meson production is analysed in a free quark model. Arguments are given for the predominance of electromagnetic c-quark pair creation with subsequent q-quark association. F-meson production is not suppressed. Experimental tests of these findings are suggested in regions with and without resonances. (Submitted for publication. ) *Work supported in part by the Energy Research and Developm...
متن کاملSemiexclusive production in electron-positron annihilation.
We present a thorough analysis of the direct semiexclusive production in quantum chromodynamics (QCD) of single, highly isolated mesons from electron-positron or two-photon initial states. Corrections of higher order and of subleading twist are considered, and potential divergences in the naive calculation are contained. Monte Carlo methods are used to relate the QCD calculations to experimenta...
متن کاملAnnihilation of the electron-positron pairs in polyelectrons
Annihilation of the electron-positron pairs (or (e−, e)−pairs, for short) in various polyelectrons e n e− m = e− m e n (where n ≥ 1 and m ≥ 1) is considered. In particular, we discuss the threeand four-photon annihilation of the (e−, e)−pairs in the three-body Ps− ion and four-body bi-positronium system Ps2. It is shown that the five-body e + 2 e − 3 ion is an unbound system. The closed form ex...
متن کاملOn Electron-Positron Annihilation into Nucleon-Antinucleon Pairs
We discuss the puzzling experimental results on baryon-antibaryon production in e+e− annihilation close to the threshold, in particular the fact that σ(e+e− → n̄n) >∼ σ(e+e− → p̄p). We discuss an interpretation in terms of a two-step process, via an intermediate coherent isovector state serving as an intermediary between e+e− and the baryon-antibaryon system. We provide evidence that the isovecto...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1977
ISSN: 0556-2821
DOI: 10.1103/physrevd.15.759