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Scalar Mesons, Glueballs, Instantons and the Glueball/Sigma | | Leonard S. Kisslinger
; Mikkel B. Johnson
; | | Date: |
14 Jun 2001 | | Journal: | Phys.Lett. B523 (2001) 127-134 | | Subject: | hep-ph | | Affiliation: | Carnegie Mellon Univeristy), Mikkel B. Johnson (Los Alamos National Laboratory | | Abstract: | We include instanton effects in QCD sum rules for coupled scalar glueballs and mesons. We find a light glueball/sigma as in earlier studies without instantons, but in a lattice-type pure instanton model the light glueball/sigma is not found. In the 1-2 Gev region we now find that lightest I=0 meson, in the region of the f$_o$(1370), has no direct glueball mixing, with the instanton loop replacing the glueball component. The lightest scalar mainly glueball in the region of the f$_o$(1500) is sensitive to the choice of nonperturbative gluonic parameters. | | Source: | arXiv, hep-ph/0106158 | | Services: | Forum | Review | PDF | Favorites | |
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