Journal
PHYSICAL REVIEW LETTERS
Volume 102, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.242003
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Funding
- Science & Technology Facilities Council (U.K.)
- EU [MRTN-CT-2006-035482]
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Pion exchange in an S wave between hadrons that are themselves in a relative S wave can shift energies by hundreds of MeV. In the case of charmed mesons D, D*, D-0, D-1, a spectroscopy of quasimolecular states may arise consistent with enigmatic charmonium states observed above 4 GeV in e(+)e(-) annihilation. A possible explanation of Y(4260) -> psi pi pi and Y(43600) -> psi'pi pi is found. Searches in D (D) over bar3 pi channels as well as B decays are recommended to test this hypothesis.
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