Lowering the critical temperature with eight-quark interactions
نویسندگان
چکیده
منابع مشابه
Extended NJL model with eight-quark interactions
We present the results obtained in the three-flavour (Nf = 3) Nambu–JonaLasinio model which is extended by the U(1)A breaking six-quark ’t Hooft interaction and eight-quark interactions. We address the problem of stability, and some phenomenological consequences of the models with multi-quark interactions. A number of instructive models in low-energy QCD assume the existence of underlying multi...
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The extension of the Nambu–Jona-Lasinio Model (NJL) [1] with ’t Hoof determinant [2, 3, 4] to include eight quark interactions [5] has been proposed as a solution for the vacuum stability problems which have been shown to afflict this model [6]. While the mesonic spectra, which can now be built on the spontaneously broken vacuum induced by the ‘t Hooft interaction strength, as opposed to the co...
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The thermodynamic potential and thermal dependence of low lying mass spectra of scalars and pseudoscalars are evaluated in a generalized Nambu — Jona-Lasinio model, which incorporates eight-quark interactions. These are necessary to stabilize the scalar effective potential for the light and strange quark flavors, which would be otherwise unbounded from below. In addition it turns out that they ...
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We investigate a spectrum of a fermion, which we call a quark, above the critical temperature of the chiral phase transition in a gauge theory using the Schwinger-Dyson (SD) equation. The SD equation enables us to study the spectrum over a wide range of the gauge coupling. It is shown that the quark spectrum has two sharp peaks which correspond to the normal quasi-quark and the plasmino and is ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2007
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2007.01.026