TY - JOUR
A2 - Seidel, Sally
AU - Bischer, Ingolf
PY - 2017
DA - 2017/09/27
TI - Massive Fluctuations in Deconfining SU(2) Yang-Mills Thermodynamics
SP - 8593678
VL - 2017
AB - We review how vertex constraints inherited from the thermal ground state strongly reduce the integration support of loop four-momenta associated with massive quasiparticles in bubble diagrams constituting corrections to the free thermal quasiparticle pressure. In spite of the observed increasingly suppressing effect when increasing 2-particle-irreducible (2PI) loop order, a quantitative analysis enables us to disprove the conjecture voiced in hep-th/0609033 that the loop expansion would terminate at a finite order. This reveals the necessity to investigate exact expressions of (at least some) higher-loop order diagrams. Explicit calculation shows that although the behaviour of the 2PI three-loop contribution at low temperatures displays hierarchical suppression compared to lower loop orders, its high-temperature expression instead dominates all lower orders. However, an all-loop-order resummation of a class of 2PI bubble diagrams is shown to yield an analytic continuation of the low-temperature hierarchy to all temperatures in the deconfining phase.
SN - 1687-7357
UR - https://doi.org/10.1155/2017/8593678
DO - 10.1155/2017/8593678
JF - Advances in High Energy Physics
PB - Hindawi
KW -
ER -