Glueball Regge trajectories and the Pomeron -- a lattice study --

Details Glueball Regge trajectories and the Pomeron -- a lattice study -- Glueball Regge trajectories and the Pomeron -- a lattice study --

2004-09-15

arxiv.org/abs/hep-ph/0409183v1

Phys.Lett. B605 (2005) 344-354

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 6 figures

Scientific paper

10.1016/j.physletb.2004.11.036

We perform lattice calculations of the lightest J=0,2,4,6 glueball masses in the D=3+1 SU(3) gauge theory and extrapolate to the continuum limit. Assuming that these masses lie on linear Regge trajectories we find a leading glueball trajectory alpha(t)=0.93(24) + 0.28(2)alpha'_R t, where alpha'_R ~ 0.9 GeV^{-2} is the slope of the usual mesonic Regge trajectory. This glueball trajectory has an intercept and slope similar to that of the Pomeron trajectory. We contrast this with the situation in D=2+1 where the leading glueball Regge trajectory is found to have too small an intercept to be important for high-energy cross-sections. We interpret the observed states and trajectories in terms of open and closed string models of glueballs. We discuss the large-N limit and perform an SU(8) calculation that hints at new states based on closed strings in higher representations.

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