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|Title:||Pseudoscalar glueball mass: a window on three-gluon interactions|
|Author:||Souza, E. V.|
Ferreira, M. N.
Aguilar, A. C.
Roberts, C. D.
|Abstract:||In pure-glue QCD, gluon–gluon scattering in the JPC= 0 - + channel is described by a very simple equation, especially if one considers just the leading contribution to the scattering kernel. Of all components in this kernel, only the three-gluon vertex, Vμ ν ρ, is poorly constrained by contemporary analyses; hence, calculations of 0 - + glueball properties serve as a clear window onto the character and form of Vμ ν ρ. This is important given that many modern calculations of Vμ ν ρ predict the appearance of an infrared suppression in the scalar function which comes to modulate the bare vertex after the nonperturbative resummation of interactions. Such behaviour is a peculiar prediction; but we find that the suppression is essential if one is to achieve agreement with lattice-QCD predictions for the 0 - + glueball mass. Hence, it is likely that this novel feature of Vμ ν ρ is real and has observable implications for the spectrum, decays and interactions of all QCD bound-states|
|Appears in Collections:||IFGW - Artigos e Outros Documentos|
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