Glueball Regge trajectories and the pomeron: a lattice study
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 α(t) = 0.93(24) + 0.28(2)α′...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2005
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| Summary: | 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 α(t) = 0.93(24) + 0.28(2)α′ Rt, where α′ 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. © 2004 Elsevier B.V. All rights reserved. |
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