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 کاملCharmonium Production ∗
Theoretical analyses of the results on quarkonium production at large transverse momentum (p T) in p¯ p collisions, at the Tevatron have revealed two novel features of the physics of quarkonium production : 1) the contribution of fragmentation of gluons and charm quarks to the cross-section at large p T , and 2) the importance of colour octet components of the quarkonium wave-function. I discus...
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.
متن کاملcharmonium production at the Tevatron
The production of the P1 charmonium state, hc, at large-pT at the Tevatron is considered. The colour-octet contributions to this state are found to be dominant and give a reasonably large rate for the production of hc. This should make it feasible to look for this resonance in the J/ψ + π decay channel. This production rate is a prediction of NRQCD, and the observation of the hc at the Tevatron...
متن کاملCharmonium production at the LHC
The analyses of large transverse momentum charmonium production at the Tevatron have shown that fragmentation of gluons is an important production mechanism. We study large-pT charmonium production in pp collisions at the LHC, and find that due to the copious gluon production at this energy, the gluon fragmentation contribution completely overwhelms the fusion contribution and the charm quark f...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1998
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.58.034013