PT Journal
AU Souza, EV
   Ferreira, MN
   Aguilar, AC
   Papavassiliou, J
   Roberts, CD
   Xu, SS
TI Pseudoscalar glueball mass: a window on three-gluon interactions
SO European Physical Journal A
JI Eur. Phys. J. A
PY 2020
BP 25
EP 7pp
VL 56
IS 1
DI 10.1140/epja/s10050-020-00041-y
LA English
AB In pure-glue QCD, gluon-gluon scattering in the J(PC) = 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, V-mu nu rho, is poorly constrained by contemporary analyses; hence, calculations of 0(-+) glueball properties serve as a clear window onto the character and form of V-mu nu rho. This is important given that many modern calculations of V-mu nu rho 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 V-mu nu rho is real and has observable implications for the spectrum, decays and interactions of all QCD bound-states.
ER