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Some problems in heavy-quarkonium decays

  • Elementary Particles and Fields
  • Theory
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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 \(D_s^ + \to s\bar se^ + \nu \to [\sigma (600) + f_0 (980)]e^ + \nu \to \pi ^ + \pi ^ - e^ + \nu\) with the mechanisms of light-pseudoscalar-meson production in the process \(D_s^ + \to s\bar se^ + \nu \to (\eta /\eta ')e^ + \nu\) reveals that the transition \(s\bar s \to \sigma (600)\) is negligible in relation to the transition \(s\bar s \to f_0 (980)\). As for f 0(980), \(s\bar s \to f_0 (980)\) is not more than 30% of \(s\bar s \to \eta _s (\eta _s = s\bar s)\). It is proposed to study light scalar mesons in the semileptonic decays of D +(D ) \(D^0 (\bar D^0 )\), B +(B ), and \(B^0 (\bar B^0 )\). Second, interference phenomena observed in the ψ(3770)-resonance region in the reaction \(e^ + e^ - \to D\bar D\) 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-\(D\bar D\) decay channels such as e + e ψ(3770) → γχ c0, J/ψη, and ϕη. Third, branching ratios are calculated for ψ(3770) and ϒ(10580) decays proceeding to light (non-\(D\bar D\) and non-\(B\bar B\)) hadrons owing to the contributions of real \(D\bar D\) and \(B\bar B\) 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.

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References

  1. N. N. Achasov and A. V. Kiselev, Phys. Rev. D 86, 114010 (2012).

    Article  ADS  Google Scholar 

  2. J. Beringer et al. (Partical Data Group), Phys. Rev. D 86, 010001 (2012); 2013 partial update for the 2014 edition.

    Article  ADS  Google Scholar 

  3. CLEO Collab. (K. M. Ecklund et al.), Phys. Rev. D 80, 052009 (2009).

    Article  Google Scholar 

  4. N. N. Achasov and A. V. Kiselev, Phys. Rev. D 85, 094016 (2012).

    Article  ADS  Google Scholar 

  5. N. N. Achasov and G. N. Shestakov, Phys. Rev.D 86, 114013 (2012).

    Article  ADS  Google Scholar 

  6. N. N. Achasov and G. N. Shestakov, Phys. Rev.D 87, 057502 (2013).

    Article  ADS  Google Scholar 

  7. BES Collab. (M. Ablikim et al.), Phys. Rev. Lett. 97, 262001 (2006).

    Article  Google Scholar 

  8. BES Collab. (M. Ablikim et al.), Phys. Lett. B 652, 238 (2007).

    Article  ADS  Google Scholar 

  9. CLEO Collab. (D. Besson et al.), Phys. Rev. Lett. 104, 159901(E) (2010).

    Article  ADS  Google Scholar 

  10. BABAR Collab. (B. Aubert et al.), Phys. Rev. D 76, 111105(R) (2007).

    Article  ADS  Google Scholar 

  11. BABAR Collab. (B. Aubert et al.), Phys. Rev. D 79, 092001 (2009).

    Article  ADS  Google Scholar 

  12. Belle Collab. (G. Pakhlova et al.), Phys. Rev. D 77, 011103(R) (2008).

    Article  ADS  Google Scholar 

  13. N. N. Achasov and A. A. Kozhevnikov, Phys. Rev. D 49, 275 (1994).

    Article  ADS  Google Scholar 

  14. N. N. Achasov and A. A. Kozhevnikov, Phys. At. Nucl. 69, 988 (2006).

    Article  Google Scholar 

Download references

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Correspondence to N. N. Achasov.

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Original Russian Text © N.N. Achasov, A.V. Kiselev, A.A. Kozhevnikov, G.N. Shestakov, 2015, published in Yadernaya Fizika, 2015, Vol. 78, No. 5, pp. 458–465.

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Achasov, N.N., Kiselev, A.V., Kozhevnikov, A.A. et al. Some problems in heavy-quarkonium decays. Phys. Atom. Nuclei 78, 428–435 (2015). https://doi.org/10.1134/S1063778815020040

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