Summary
We examine the Schwinger-Dyson equation for the quark propagator determined by the gauge approximation technique extended to finite temperatures using the real-time formalism of Dolan and Jackiw and utilizing the singular gluon propagatorà la Ball-Baker-Zachariasen. We conclude: 1)if the phase transitions do in fact occur, thenT C≥T F; 2) chiralsymmetry restoration does not, however, take place at finiteT C, within the approximations employed.
Riassunto
Si esamina l’equazione di Schwinger-Dyson per il propagatore di quark determinata dalla tecnica di approssimazione di gauge estesa a temperature finite usando il formalismo a tempo reale di Dolan e Jackiw e utilizzando il propagatore di gluoni singolarià la Ball-Baker-Zachariasen. Si conclude: 1)se le transizioni di fase avvengono veramente, alloraT C≥T F; 2) il ripristino della simmetria chirale comunque non avviene aT C finito entro le approssimazioni impiegate.
Резюме
Мы исследууем уравнение Швингера-Дайсона для пропагатора кварков, определенного с помощью техники калибровочного приближения, обобщенной на случай конечных температур. Мы используем формализм реального времени и сингулярный глуонный пропагатор Болла-Бекера-Захриазена. Мы показываем: 1) если фазовые переходы, в действительности, происходят, тоT c≥T F; 2) однако восстановление киральной симметрии при конечной температуреT c не происходит в рамках использованных приближений.
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Acharya, R., Narayana Swamy, P. The quark liberation temperatureT F and the chiral restoration temperatureT C in continuum quantum chromodynamics. Nuov Cim A 102, 1255–1266 (1989). https://doi.org/10.1007/BF02800336
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DOI: https://doi.org/10.1007/BF02800336