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Light flavor and heavy quark spin symmetry in heavy meson molecules

Abstract : We propose an effective field theory incorporating light SU(3)-flavor and heavy quark spin symmetry to describe charmed meson-antimeson bound states. At lowest order the effective field theory entails a remarkable simplification: it only involves contact range interactions among the heavy meson and antimeson fields. We show that the isospin violating decays of the X(3872) can be used to constrain the interaction between the D and a D̅ * mesons in the isovector channel. As a consequence, we can rule out the existence of an isovector partner of the X(3872). If we additionally assume that the X(3915) and Y(4140) are D*D̅ * and Ds*D̅ s* molecular states, we can determine the full spectrum of molecular states with isospin I=0, 1/2 and 1.
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Submitted on : Tuesday, July 9, 2013 - 3:14:22 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:16 PM

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C. Hidalgo-Duque, J. Nieves, M. Pavón Valderrama. Light flavor and heavy quark spin symmetry in heavy meson molecules. Physical Review D, American Physical Society, 2013, 87, pp.076006. ⟨10.1103/PhysRevD.87.076006⟩. ⟨in2p3-00842829⟩

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