期刊
PHYSICAL REVIEW LETTERS
卷 113, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.112001
关键词
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资金
- U.S. Department of Energy [DE-AC02-76SF00515]
- Korea Foundation for International Cooperation of Science & Technology (KICOS)
- National Research Foundation of Korea [2010-0011034]
- National Science Foundation [PHY-1068286]
- National Research Foundation of Korea [2010-0011034] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Direct For Mathematical & Physical Scien
- Division Of Physics [1068286, 1403891] Funding Source: National Science Foundation
We present a new dynamical picture that identifies the formation of the exotic (c) over barc-containing states XYZ with the confinement-induced hadronization of a rapidly separating pair of a compact diquark and antidiquark. This picture combines the advantages of diquark-based models, which can accommodate much of the known XYZ spectrum, with the experimental fact that such states are both relatively narrow and are produced promptly. It also naturally explains the preference of some of the exotic states to decay to psi(2S), rather than J/psi,in terms of a simple wave-function overlap effect.
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