منابع مشابه
The decay η ′ c → η
The decay η ′ c → η c π π. Abstract It is pointed out that the decay of the recently observed charmonium η ′ c resonance, η ′ c → η c π π is simply related to the well studied decay ψ ′ → J/ψ π π and can thus be used for absolute normalization of other decay modes of the η ′ c. The total rate of the discussed decay should be approximately three to four times the corresponding rate for the ψ ′ r...
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We reconcile the 1/Nc expansion with the observed η − η′ mass spectrum. The chiral corrections introduced for that purpose are natural and consistent with the octet-singlet mixing angle θ = −(22±1)◦ extracted from phenomenology in the large Nc limit. e-mail address: [email protected] e-mail address: [email protected]
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Diffractive photoproduction of η c is an important process to study the effect of Odderon, whose existence is still not confirmed in experiment. A detailed interpretation of Odderon in QCD, i.e., in terms of gluons is also unclear. Taking charm quarks as heavy quarks, we can use NRQCD to handel η c as a c¯ c pair. In the forward region of the kinematics, the c¯ c pair interacts with initial had...
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ژورنال
عنوان ژورنال: Nature
سال: 1871
ISSN: 0028-0836,1476-4687
DOI: 10.1038/004478a0