Exclusive production of the X(3872) in B meson decay

Journal Article · Fri Apr 01 00:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.074005· OSTI ID:20708976

Braaten, Eric; Kusunoki, Masaoki ^[1]

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1. Physics Department, Ohio State University, Columbus, Ohio 43210 (United States)

If the recently discovered charmoniumlike state X(3872) is a loosely bound S-wave molecule of the charm mesons D{sup 0}D*{sup 0} or D*{sup 0}D{sup 0}, it can be produced through the weak decay of the B meson into D{sup 0}D*{sup 0}K or D*{sup 0}D{sup 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{yields}XK are determined by the binding energy of X, while the short-distance factors are essentially determined by the amplitudes for B{yields}D{sup 0}D*{sup 0}K and B{yields}D*{sup 0}D{sup 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{yields}D{sup (}*{sup )}D{sup (}*{sup )}K using a factorization assumption, heavy-quark symmetry, and isospin symmetry. The resulting order-of-magnitude estimate of the branching fraction for B{sup +}{yields}XK{sup +} is compatible with observations provided that J/{psi}{pi}{sup +}{pi}{sup -} is a major decay mode of the X. The branching fraction for B{sup 0}{yields}XK{sup 0} is predicted to be suppressed by more than an order of magnitude compared to that for B{sup +}{yields}XK{sup +}.

• OSTI ID: 20708976
• Journal Information: Physical Review. D, Particles Fields, Vol. 71, Issue 7; Other Information: DOI: 10.1103/PhysRevD.71.074005; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
B NEUTRAL MESONS
B PLUS MESONS
B QUARKS
BINDING ENERGY
BRANCHING RATIO
C QUARKS
COALESCENCE
D NEUTRAL MESONS
D*-2010 MESONS
DISTANCE
FACTORIZATION
HADRONIC PARTICLE DECAY
ISOSPIN
KAONS
PARTICLE IDENTIFICATION
PIONS MINUS
PIONS PLUS
S WAVES
SCATTERING LENGTHS
SPIN
SYMMETRY
T QUARKS