期刊
PHYSICS LETTERS B
卷 772, 期 -, 页码 200-209出版社
ELSEVIER
DOI: 10.1016/j.physletb.2017.06.030
关键词
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资金
- U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC05-06OR23177]
- U.S. Department of Energy [DE-FG0287ER40365]
- National Science Foundation [PHY-1415459, PHY-1205019]
- IU Collaborative Research Grant
- PAPIIT-DGAPA (UNAM) [IA101717]
- CONACYT (Mexico) [251817]
- Red Tematica CONACYT de Fisica de Altas Energias (Red FAE, Mexico)
- Direct For Mathematical & Physical Scien
- Division Of Physics [1415459] Funding Source: National Science Foundation
The microscopic nature of the XYZ states remains an unsettled topic. We show how a thorough amplitude analysis of the data can help constraining models of these states. Specifically, we consider the case of the Z(c)(3900) peak and discuss possible scenarios of a QCD state, virtual state, or a kinematical enhancement. We conclude that current data are not precise enough to distinguish between these hypotheses, however, the method we propose, when applied to the forthcoming high-statistics measurements should shed light on the nature of these exotic enhancements. (C) 2017 The Author(s). Published by Elsevier B.V.
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