Exclusive Production of the X(3872) in B Meson Decay

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dc.creatorBraaten, Eric
dc.creatorKusunoki, Masaoki
dc.date2004-12-17
dc.date2005-03-31
dc.date.accessioned2026-07-07T10:29:21Z
dc.date.available2026-07-07T10:29:21Z
dc.descriptionIf the recently-discovered charmonium-like state X(3872) is a loosely-bound S-wave molecule of the charm mesons D^0 \bar D^{*0} or D^{*0} \bar D^0, it can be produced through the weak decay of the B meson into D^0 \bar D^{*0} K or D^{*0} \bar D^0 K followed by the coalescence of the charm mesons at a long-distance scale set by the scattering length of the charm mesons. The long-distance factors in the amplitude for the decay B \to XK are determined by the binding energy of X, while the short-distance factors are essentially determined by the amplitudes for B \to D^0 \bar D^{*0} K and B \to D^{*0} \bar D^0 K near the thresholds for the charm mesons. We obtain a crude determination of the short-distance amplitudes by analyzing data from the Babar collaboration on the branching fractions for B\to \bar D^{(*)} D^{(*)} K using a factorization assumption, heavy quark symmetry, and isospin symmetry. The resulting order-of-magnitude estimate of the branching fraction for B^+ \to X K^+ is compatible with observations provided that J/ψπ^+ π^- is a major decay mode of the X. The branching fraction for B^0 \to X K^0 is predicted to be suppressed by more than an order of magnitude compared to that for B^+ \to X K^+.
dc.description20 pages, 4 figures, revtex4, to appear in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-ph/0412268
dc.identifierhttp://arxiv.org/abs/hep-ph/0412268
dc.identifierPhys.Rev.D71:074005,2005
dc.identifierdoi:10.1103/PhysRevD.71.074005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177773
dc.subjectHigh Energy Physics - Phenomenology
dc.titleExclusive Production of the X(3872) in B Meson Decay
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