The decay η ′ c → η
نویسنده
چکیده
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 ′ resonance making the channel with charged pions the most probable exclusive decay mode of the η ′ c with the branching ratio in the range 5-10%.
منابع مشابه
ep - p h / 04 02 29 4 v 1 2 7 Fe b 20 04 The number of colors in the decays π 0 , η , η ′ → γγ
The decays π 0 , η, η ′ → γγ are investigated up to next-to-next-to leading order in the framework of the combined 1/N c and chiral expansions. Without mixing of the pseu-doscalar mesons the N c independence of the π 0 and η decay amplitudes is shown to persist at the one-loop level, although the contribution of the Wess-Zumino-Witten term to the pertinent vertices is not canceled by the N c de...
متن کاملMomentum Spectrum of η ′ meson produced from the inclusive decay B → η ′ X s Dong - Sheng Du
The momentum distribution for the η′ meson produced through the inclusive decay B → η′X is investigated under two decay mechanisms, b → η′s and b → η′sg. Although all these two mechanisms can explain the recently observed decay rate of B → η′X, the momentum spectrums for η′ meson predicted by them are strongly different. Thus detailed experiment is proposed to distinguish the two cases.
متن کاملMomentum Spectrum of η ′ Meson Produced From the Inclusive Decay B → η ′
The momentum distribution for the η′ meson produced through the inclusive decay B → η′X is investigated under two decay mechanisms, b → η′s and b → η′sg. Although all these two mechanisms can explain the recently observed decay rate of B → η′X, the momentum spectrums for η′ meson predicted by them are strongly different. Thus detailed experiment is proposed to distinguish the two cases.
متن کاملOn the Role of Charm in Decay of B-mesons to η ′ K
In this letter we focus on the calculation of f (c) η ′ , the amplitude of the (c¯ c) → (gluons) → η ′ transition, which provides the magnitude of the contribution of the Cabbibo favored b → ¯ ccs elementary process to B → η ′ K decay. It is found that f (c) η ′ = −12.3 ∼ −18.4 M eV on the scale of m c. This number is in a strong contradiction with the estimations of Halperin, Zhit-nitsky and S...
متن کاملFlavor Symmetry Breaking and Mixing Effects in the ηγ and η′γ Transition Form Factors
Abstract. We reanalyze the ηγ and ηγ transition form factors within the modified hard scattering approach on the basis of new experimental data from CLEO [1] and L3 [2]. Our approach perfectly describes the experimental data over a wide range of the virtuality of the probing photon, 1 GeV2 ≤ Q2 ≤ 15 GeV2. The analysis provides hints that the conventional flavor octet-singlet scheme for the η-η ...
متن کامل