Massive fluctuations in deconfining SU(2) Yang-Mills thermodynamics
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 s...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
27 September 2017
|
| In: |
Advances in high energy physics
|
| ISSN: | 1687-7365 |
| DOI: | 10.1155/2017/8593678 |
| Online Access: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1155/2017/8593678 Verlag, kostenfrei, Volltext: https://www.hindawi.com/journals/ahep/2017/8593678/ 
|
| Author Notes: | Ingolf Bischer |
| Summary: | 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. |
|---|---|
| Item Description: | Gesehen am 15.08.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1687-7365 |
| DOI: | 10.1155/2017/8593678 |