QCD sum rules for the production of the X(3872) as a mixed molecule-charmonium state in B meson decay

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2011-08-26
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Zanetti, Carina Maria
Nielsen, Marina
Matheus, Ricardo D'Elia [UNIFESP]
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We use QCD sum rules to calculate the branching ratio for the production of the meson X(3872) in the decay B -> X(3872)K, assumed to be a mixture between charmonium and exotic molecular vertical bar c (q) over bar vertical bar vertical bar q (c) over bar vertical bar states with J(PC) = 1(++). We find that in a small range for the values of the mixing angle, 5 degrees <= theta <= 13 degrees, we get the branching ratio B(B -> XK) = (1.00 +/- 0.68) x 10(-5), which is in agreement with the experimental upper limit. This result is compatible with the analysis of the mass and decay width of the mode J/psi(n pi) and the radiative decay mode J/psi gamma performed in the same approach. (C) 2011 Elsevier B.V. All rights reserved.
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Physics Letters B. Amsterdam: Elsevier B.V., v. 702, n. 5, p. 359-363, 2011.
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