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    • Scattering of an ultrasoft pion and the X(3872) 

      Braaten, E; Hammer, HW; Mehen, T (Physical Review D - Particles, Fields, Gravitation and Cosmology, 2010-08-16)
      The identification of the X(3872) as a loosely-bound charm-meson molecule allows it to be described by an effective field theory, called XEFT, for the D*D̄, DD̄*, and DD̄π sector of QCD at energies small compared to the ...