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Title: Some problems in heavy-quarkonium decays

Abstract

Problems proposed by the present authors for studies at c-τ, b, super-c-τ, and super-b factories are formulated. First, a comparison of the mechanisms of light-scalar-meson production in the process D{sub s}{sup +}→ss̄e{sup +}ν→[σ(600)+f{sub 0}(980)]e{sup +}ν→π{sup +}π{sup −}e{sup +}ν with the mechanisms of light-pseudoscalar-meson production in the process D{sub s}{sup +}→ss̄e{sup +}ν→(η/η{sup ′})e{sup +}ν reveals that the transition ss̄→σ(600) is negligible in relation to the transition ss̄→f{sub 0}(980). As for f{sub 0}(980), ss̄→f{sub 0}(980) is not more than 30% of ss̄→η{sub s}(η{sub s}=ss̄). It is proposed to study light scalar mesons in the semileptonic decays of D{sup +}(D{sup −}) D{sup 0}(D̄{sup 0}), B{sup +}(B{sup −}), and B{sup 0}(B̄{sup 0}). Second, interference phenomena observed in the ψ(3770)-resonance region in the reaction e{sup +}e{sup −}→DD̄ are described on the basis of models satisfying the elastic-unitarity requirement. As a model, we propose the model of mixed ψ(3770) and ψ(2S) resonances. In order to select theoretical models, it is proposed to employ non-DD̄ decay channels such as e{sup +}e{sup −} → ψ(3770) → γχ{sub c0}, J/ψη, and ϕη. Third, branching ratios are calculated for ψ(3770) and ϒ(10580) decays proceeding to light (non-DD̄ and non-BB̄) hadrons owing to the contributions of real DD̄ and BB̄ intermediatemore » states. The predictions obtained for these branching ratios lie in the range of 1% ≲ BR ≲ 15%. The lower boundary of this range is ten times higher than the branching ratio for annihilation to three gluons.« less

Authors:
; ; ;  [1]
  1. Russian Academy of Sciences, Laboratory of Theoretical Physics, Sobolev Institute of Mathematics, Siberian Branch (Russian Federation)
Publication Date:
OSTI Identifier:
22722860
Resource Type:
Journal Article
Journal Name:
Physics of Atomic Nuclei
Additional Journal Information:
Journal Volume: 78; Journal Issue: 3; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7788
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; BRANCHING RATIO; ELECTRON-POSITRON COLLISIONS; F0-980 MESONS; FORECASTING; GLUONS; INTERFERENCE; INTERMEDIATE STATE; MESON FACTORIES; PARTICLE PRODUCTION; PSEUDOSCALAR MESONS; PSEUDOSCALARS; QUARKONIUM; RESONANCE PARTICLES; SEMILEPTONIC DECAY; UNITARITY

Citation Formats

Achasov, N. N., E-mail: achasov@math.nsc.ru, Kiselev, A. V., Kozhevnikov, A. A., and Shestakov, G. N. Some problems in heavy-quarkonium decays. United States: N. p., 2015. Web. doi:10.1134/S1063778815020040.
Achasov, N. N., E-mail: achasov@math.nsc.ru, Kiselev, A. V., Kozhevnikov, A. A., & Shestakov, G. N. Some problems in heavy-quarkonium decays. United States. doi:10.1134/S1063778815020040.
Achasov, N. N., E-mail: achasov@math.nsc.ru, Kiselev, A. V., Kozhevnikov, A. A., and Shestakov, G. N. Fri . "Some problems in heavy-quarkonium decays". United States. doi:10.1134/S1063778815020040.
@article{osti_22722860,
title = {Some problems in heavy-quarkonium decays},
author = {Achasov, N. N., E-mail: achasov@math.nsc.ru and Kiselev, A. V. and Kozhevnikov, A. A. and Shestakov, G. N.},
abstractNote = {Problems proposed by the present authors for studies at c-τ, b, super-c-τ, and super-b factories are formulated. First, a comparison of the mechanisms of light-scalar-meson production in the process D{sub s}{sup +}→ss̄e{sup +}ν→[σ(600)+f{sub 0}(980)]e{sup +}ν→π{sup +}π{sup −}e{sup +}ν with the mechanisms of light-pseudoscalar-meson production in the process D{sub s}{sup +}→ss̄e{sup +}ν→(η/η{sup ′})e{sup +}ν reveals that the transition ss̄→σ(600) is negligible in relation to the transition ss̄→f{sub 0}(980). As for f{sub 0}(980), ss̄→f{sub 0}(980) is not more than 30% of ss̄→η{sub s}(η{sub s}=ss̄). It is proposed to study light scalar mesons in the semileptonic decays of D{sup +}(D{sup −}) D{sup 0}(D̄{sup 0}), B{sup +}(B{sup −}), and B{sup 0}(B̄{sup 0}). Second, interference phenomena observed in the ψ(3770)-resonance region in the reaction e{sup +}e{sup −}→DD̄ are described on the basis of models satisfying the elastic-unitarity requirement. As a model, we propose the model of mixed ψ(3770) and ψ(2S) resonances. In order to select theoretical models, it is proposed to employ non-DD̄ decay channels such as e{sup +}e{sup −} → ψ(3770) → γχ{sub c0}, J/ψη, and ϕη. Third, branching ratios are calculated for ψ(3770) and ϒ(10580) decays proceeding to light (non-DD̄ and non-BB̄) hadrons owing to the contributions of real DD̄ and BB̄ intermediate states. The predictions obtained for these branching ratios lie in the range of 1% ≲ BR ≲ 15%. The lower boundary of this range is ten times higher than the branching ratio for annihilation to three gluons.},
doi = {10.1134/S1063778815020040},
journal = {Physics of Atomic Nuclei},
issn = {1063-7788},
number = 3,
volume = 78,
place = {United States},
year = {2015},
month = {5}
}