Production of the X(3872) in B Meson Decay by the Coalescence of Charm Mesons

Details Production of the X(3872) in B Meson Decay by the Coalescence of Charm Mesons Production of the X(3872) in B Meson Decay by the Coalescence of Charm Mesons

2004-04-19

arxiv.org/abs/hep-ph/0404161v2

Phys.Rev.Lett.93:162001,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures, revtex4

Scientific paper

10.1103/PhysRevLett.93.162001

If the recently-discovered charmonium state X(3872) is a loosely-bound S-wave molecule of the charm mesons \bar D^0 D^{*0} or \bar D^{*0} D^0, it can be produced in B meson decay by the coalescence of charm mesons. If this coalescence mechanism dominates, the ratio of the differential rate for B^+ \to \bar D^0 D^{*0} K^+ near the \bar D^0 D^{*0} threshold and the rate for B^+ \to X K^+ is a function of the \bar D^0 D^{*0} invariant mass and hadron masses only. The identification of the X(3872) as a \bar D^0 D^{*0}/\bar D^{*0} D^0 molecule can be confirmed by observing an enhancement in the \bar D^0 D^{*0} invariant mass distribution near the threshold. An estimate of the branching fraction for B^+ \to X K^+ is consistent with observations if X has quantum numbers J^{PC} = 1^{++} and if J/\psi \pi^+ \pi^- is one of its major decay modes.

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