Journal Article

FZJ-2012-00580

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Light Quark Mass Dependence in Heavy Quarkonium Physics

Guo, F.-K. (Corresponding author) ; Meißner, U.-G.FZJ*

2012
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/4864  doi:10.1103/PhysRevLett.109.062001

Abstract: The issue of chiral extrapolations in heavy quarkonium systems is discussed. We show that the light quark mass dependence of the properties of heavy quarkonia is not always suppressed. For quarkonia close to an open flavor threshold, even a nonanalytic chiral extrapolation is needed. Both these nontrivial facts are demonstrated to appear in the decay widths of the hindered M1 transitions between the first radially excited and ground state P-wave charmonia. The results at a pion mass of about 500 MeV could deviate from the value at the physical pion mass by a factor of two. Our findings show the necessity of performing chiral extrapolations for lattice simulations of heavy quarkonium systems.

Keyword(s): quarkonium: heavy ; quark: mass dependence ; pi: mass ; decay: width ; chiral

Note: 5 pages, 5 figures. Version to appear in Phys. Rev. Lett

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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. 531 - Hadron Structure and Dynamics (HSD) (POF2-531) (POF2-531)

Appears in the scientific report 2012

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Database coverage:
; ; ; Current Contents - Social and Behavioral Sciences ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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