Exclusive charmonium decays
نویسندگان
چکیده
منابع مشابه
Colour-octet contributions to exclusive charmonium decays
We investigate the theoretical uncertainties of P -wave charmonium decays into two pions, cJ ! + , 0 . Constraining the pion distributionamplitude from the recent precise data on F (Q ), we nd an order-ofmagnitude discrepancy between data and prediction. The disagreement persists even after inclusion of transverse degrees of freedom and Sudakov suppressions. We propose the colour-octet mechanis...
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The role of higher Fock-state contributions to exclusive charmonium decays will be discussed. It will be argued that the J/ψ (ψ) decays into baryon-antibaryon pairs are dominated by the valence Fock-state contributions. P -wave charmonium decays, on the other hand, receive strong contributions from the ccg Fock states since the valence Fock-state contributions are suppressed in these reactions....
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We have fully reconstructed decays of both B 0 and B mesons into nal states containing either D, D , D , , 0 or c1 mesons. This allows us to obtain new results on many physics topics including branching ratios, tests of the factorization hypothesis, color suppression, resonant substructure, and the B B 0 mass diierence.
متن کاملProblems of QCD factorization in exclusive decays of B meson to charmonium
We study the exclusive decays of B meson into P-wave charmonium states χcJ(J = 0, 1) within QCD factorization approach and find that for B → χc1K decay, the factorization breaks down due to logarithmic divergences arising from nonfactorizable spectator interactions even at twist-2 order, and the decay rate is too small to accommodate the data, and that for B → χc0K decay, there are infrared div...
متن کاملMeasurement of branching fractions and charge asymmetries for exclusive B decays to charmonium.
We report measurements of branching fractions and charge asymmetries of exclusive decays of neutral and charged B mesons into two-body final states containing a charmonium state and a light strange meson. The charmonium mesons considered are J/psi, psi(2S) and chi(c1), and the light meson is either K or K(*). We use a sample of about 124x10(6) BB pairs collected with the BABAR detector at the P...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 1998
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(97)01107-9