Journal Article

FZJ-2020-05071

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Are the XYZ states unconventional states or conventional states with unconventional properties?

Hanhart, C. (Corresponding author)FZJ* ; Klempt, E.

2020
World Scientific Publ. Singapur

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Please use a persistent id in citations: http://hdl.handle.net/2128/26524  doi:10.1142/S0217751X20500190

Abstract: We discuss three possible scenarios for the interpretation of mesons containing a heavy quark and its antiquark near and above the first threshold for a decay into a pair of heavy mesons in a relative S-wave. View I assumes that these thresholds force the quark potential to flatten which implies that while in these energy ranges molecular states may be formed, there should not be any quark–antiquark states above these thresholds. View II assumes that the main part of the interaction between two mesons is due to the poles which originate from the QQ̄ interaction. The properties of the QQ̄ mesons are strongly influenced by opening thresholds but the number of states is given by the quark model. In View III, both types of mesons are admitted also near and above the open flavor thresholds: QQ̄ mesons and dynamically generated mesons. Experimental consequences of these different views are discussed.

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Contributing Institute(s):

1. Theorie der Starken Wechselwirkung (IAS-4)
2. Theorie der starken Wechselwirkung (IKP-3)

Research Program(s):

1. 511 - Computational Science and Mathematical Methods (POF3-511) (POF3-511)
2. DFG project 196253076 - TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik (196253076) (196253076)

Appears in the scientific report 2020

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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