Do ψ(4040), ψ(4160) signal hybrid charmonium?
نویسندگان
چکیده
منابع مشابه
Hybrid charmonium
Lowest charmonium hybrids are considered in the framework of the QCD string model. All parameters of the model are fixed from the fit for the spectrum of conventional charmonia. Then masses, spin splittings, and relative decay rates into various Sand P-wave D-meson pairs are calculated for charmonium hybrids with a magnetic gluon. Results are compared with the lattice predictions and with the e...
متن کاملHybrid charmonium from lattice QCD∗
We review our recent results on the J PC = 0 −− exotic hybrid charmonium mass and J PC = 0 −+ , 1 −− and 1 ++ nonexotic hybrid charmonium spectrum from anisotropic improved lattice QCD and discuss the relevance to the recent discovery of the Y (4260) state and future experimental search for other states.
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The ground and first excited states of the hybrid charmonium c̄cg, with non-exotic quantum numbers J = 0, 1−− and 1 are investigated using quenched lattice QCD. They are completely ignored in the literature, only because their ground states are degenerate with ηc, J/ψ, and χc1, and are difficult to be distinguished from these conventional charmonium mesons in experiment. However, we observe stro...
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The last few years have witnessed a renaissance in the spectroscopy of heavy quarks. Several long elusive states have now been firmly identified, and several unexpected states have been reported by the high luminosity experiments at Belle, Babar, CLEO, and Fermilab. These discoveries have posed important theoretical questions for our understanding of QCD, and a variety of theoretical models hav...
متن کاملHigher Charmonium
This contribution briefly discusses some new theoretical results for the properties of charmonium, especially the " higher charmonium " states above open-charm threshold. In particular we discuss the spectrum of states, open-flavor strong decays, and the surprisingly large effects of virtual decay loops of charmed meson pairs. 1. Introduction Recently there have been several experimental report...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1996
ISSN: 0370-2693
DOI: 10.1016/0370-2693(95)01265-6