منابع مشابه
Observation of a Charged Charmoniumlike Structure in e þ
M. Ablikim, M.N. Achasov, X. C. Ai, O. Albayrak, D. J. Ambrose, F. F. An, Q. An, J. Z. Bai, R. Baldini Ferroli, Y. Ban, J. Becker, J. V. Bennett, M. Bertani, J.M. Bian, E. Boger,* O. Bondarenko, I. Boyko, R. A. Briere, V. Bytev, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G. F. Cao, S. A. Cetin, J. F. Chang, G. Chelkov,* G. Chen, H. S. Chen, J. C. Chen, M. L. Chen, S. J. Chen, X. Chen, Y. B. Chen,...
متن کامل1 Production of four heavy quarks and Bc-mesons at the Z 0-boson pole
Production of four heavy quarks and B c-mesons at the Z 0-boson pole Abstract The cross-section for the production of b ¯ bc¯ c quarks in e + e − annihilation , that proves to be at a level of σ(e + e − → b ¯ bc¯ c)/σ(e + e − → b ¯ b) ∼ 10 −2 for √ s = M Z is calculated within the frames of the QCD perturbation theory. The cross sections for the associated production of 1S-and 2S-wave states of...
متن کاملmesons ”
In [1] the light scalar meson nonet has been considered within the QCD sum rules approach with the interpolating current consisting of the scalar diquark and the scalar antidiquark. It has been shown that the negative contributions from the operators of dimension 8 are dominant in the sum rules, so that, there is no evidence of the coupling of the above tetraquark current with the light scalar ...
متن کاملB mesons ∗
B̄ → Dπ, D∗π, J/ψK̄ and J/ψπ decays are studied. Their amplitude is given by a sum of factorized and non-factorizable ones. The latter which is estimated by using a hard pion approximation is rather small in color favored B̄ → Dπ and D∗π decays but still can efficiently interfere with the main amplitude given by the factorization. In the color suppressed B̄ → J/ψK̄ and J/ψπ decays, the non-factoriza...
متن کاملHybrid mesons
A review of the theoretical and experimental status of hybrid hadrons is presented. The states π1(1400), π1(1600), and π1(2015) are thoroughly reviewed, along with experimental results from GAMS, VES, Obelix, COMPASS, KEK, CLEO, Crystal Barrel, CLAS, and BNL. Theoretical lattice results on the gluelump spectrum, adiabatic potentials, heavy and light hybrids, and transition matrix elements are d...
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ژورنال
عنوان ژورنال: Chinese Physics C
سال: 2011
ISSN: 1674-1137
DOI: 10.1088/1674-1137/35/7/017