Journal Article

PreJuSER-18582

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Interplay of quark and meson degrees of freedom in a near-threshold resonance: multi-channel case

Hanhart, C.FZJ* ; Kalashnikova, Y. S. ; Nefediev, A. V.FZJ*

2011
Springer Berlin

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Please use a persistent id in citations: http://hdl.handle.net/2128/10282  doi:10.1140/epja/i2011-11101-9

Abstract: We investigate the interplay of quark and meson degrees of freedom in a physical state representing a near-threshold resonance for the case of multiple continuum channels. The aim is to demonstrate the full complexity of possible near-threshold phenomena. It turns out that those are especially rich, if both quark and meson dynamics generate simultaneously weakly coupled near-threshold poles in the S-matrix. We study the properties of this scenario in detail, such as t-matrix and production amplitude zeros, as well as various effects of the continuum channels interplay.

Keyword(s): meson: mass ; quark ; S-matrix: analytic properties ; resonance ; interference: effect ; X(3872): yield ; X(3872): production ; X(3872): decay modes ; bound state: energy ; entanglement ; hadronic component ; threshold

Note: We acknowledge useful discussions with E. Braaten. The work was supported in parts by funds provided from the Helmholtz Association (via grants VH-NG-222, VH-VI-231), by the DFG (via grants SFB/TR 16 and 436 RUS 113/991/0-1), by the EU HadronPhysics2 project, by the RFFI (via grants RFFI-09-02-91342-NNIOa and RFFI-09-02-00629a). The work of YuSK and AVN was supported by the State Corporation of the Russian Federation "Rosatom".; LaTeX2e, 10 pages, version to appear in Eur.Phys.J.A; LaTeX2e, 10 pages, version to appear in Eur.Phys.J.A

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Contributing Institute(s):

1. Theoretische Kernphysik (IKP-3)

Research Program(s):

1. Physik der Hadronen und Kerne (P53)

Appears in the scientific report 2011

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