The paper derives an analytic thermal correction to Regge trajectories in λφ^3 theory and uses it to argue that Regge slopes decrease and meson masses increase with temperature.
Updating spin-dependent Regge intercepts
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abstract
We use new high statistics data from CLAS and COMPASS on the nucleon's spin structure function at low Bjorken x and low virtuality, Q^2 < 0.5 GeV^2, together with earlier measurements from the SLAC E-143, HERMES and GDH experiments to estimate the effective intercept(s) for spin dependent Regge theory. We find alpha_{a_1} = 0.31 \pm 0.04 for the intercept describing the high-energy behaviour of spin dependent photoabsorption together with a new estimate for the high-energy part of the Gerasimov-Drell-Hearn sum-rule, -15 \pm 2 mu b from photon-proton centre-of-mass energy greater than 2.5 GeV. Our value of alpha_[a_1} suggests QCD physics beyond a simple straight-line a_1 trajectory.
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Thermal corrections to Regge trajectories
The paper derives an analytic thermal correction to Regge trajectories in λφ^3 theory and uses it to argue that Regge slopes decrease and meson masses increase with temperature.