2003/11/11 by Eric Braaten, Masaoki Kusunoki · 11 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Hadron #High-Energy Particle Collisions Research #Meson #Nuclear physics #Particle physics #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Resonance (particle physics) #Scattering #Universality (dynamical systems) #hep-ph
paper · pdf · doi:10.1103/physrevd.69.074005
published as Phys.Rev.D69:074005,2004 · 13 pages, revtex4
arxiv created 2003/11/11 · openalex publication_date 2004/04/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The recently discovered narrow charmonium resonance near 3870 MeV is interpreted as a hadronic molecule whose constituents are the charm mesons D0 and D*0 or D0 and D*0. Because of an accidental fine-tuning of the molecule to very near the D0D*0 threshold, it has some universal properties that are completely determined by the unnaturally large D0D*0 scattering length a. Its narrow width can be explained by the suppression by a factor of 1/a of decay modes other than the decay of a constituent D*0 or D*0. Its production rates are also suppressed by a factor of 1/a. A particularly predictive mechanism for generating the large scattering length is the accidental fine-tuning of a P-wave charmonium state to the D0D*0 threshold.