Summary
The connection is discussed between the phase transitions in the hot hadronic matter and characteristic mass parameters of the non-perturbative QCD. The spectrum of the hot hadronic matter containing light coloured scalar fields in addition to ordinary quarks and gluons is investigated by means of the finite-temperature QCD sum rules. A qualitative rearrangement of the spectrum is shown to occur at some temperatureT cr, which is entirely fixed by the value of the scalar field condensate 〈φ † φ〉. A variety of possible phase transitions in such a matter is considered.
Riassunto
Si discute la connessione di fase nella materia adronica calda e i parametri di massa caratteristici della QCD non perturbativa. Si studia lo spettro della materia adronica calda che contiene campi scalari colorati leggeri oltre ai quark e ai gluoni per mezzo delle regole di somma della QCD a temperatura finita. Si mostra che un riassestamento qualitativo dello spettro si verifica ad una certa temperaturaT cr, che è interamente fissata dal valore del condensato del campo scalare 〈φ † φ〉. Si considera una varietà di transizioni di fase possibili in questa materia.
Реэюме
Обсуждается свяэь между фаэовыми переходами в горячей адронной материи и характерными массовыми параметрами непертурбативной КХД. С помошью правил сумм КХД при конечных температурах исследован спектр горячей адронной материи, содержашей помимо обычных кварков и глюонов легкие цветные скалярные поля. Покаэано, что при некоторой температуре Тсг, целиком определяемой эначением конденсата скалярных полей 〈φ † φ〉, происходит качественная перестройка спектра. Обсуждается воэможность раэличных фаэовых переходов в такой среде.
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The deviations from the exact scaling here are due to the logarithmic corrections, proportional toα s and the due to the higher terms of the operator product expansion, which are small at the large scale, determined by the large mass of the scalar-containing hadron (12).
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Bochkarev, A.I., Shaposhnikov, M.E. Hadronic mass scales and phase transitions in QCD. Nuov Cim A 92, 17–24 (1986). https://doi.org/10.1007/BF02730424
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DOI: https://doi.org/10.1007/BF02730424