Critical Line Back-Bending Induced either by Finite &amp;lt;i&amp;gt;N&amp;lt;sub&amp;gt;c&amp;lt;/sub&amp;gt;&amp;lt;/i&amp;gt; Corrections or by a Repulsive Vector Channel

Denke, R.; Macías, Juan C.; Pinto, Marcus Benghi

doi:10.4236/jmp.2013.412195

Cited by 1 publication

(1 citation statement)

References 18 publications

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“…At finite densities the effect of chirally symmetric vector channel interaction becomes important and it is established that within the NJL or PNJL model this type of interaction weakens the first order transition line [87][88][89][90][91][92] in contrary to the scalar coupling which tends to favor the appearance of first order phase transitions. It is important to mention here that the determination of the strength of vector coupling constant is crucial under model formalism.…”

Section: Jhep02(2015)011mentioning

confidence: 99%

Vector meson spectral function and dilepton production rate in a hot and dense medium within an effective QCD approach

Islam

Majumder

Haque

et al. 2015

J. High Energ. Phys.

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The properties of the vector meson current-current correlation function and its spectral representation are investigated in details with and without isoscalar-vector interaction within the framework of effective QCD approach, namely Nambu-Jona-Lasinio (NJL) model and its Polyakov Loop extended version (PNJL), at finite temperature and finite density. The influence of the isoscalar-vector interaction on the vector meson correlator is obtained using the ring resummation known as the Random Phase Approximation (RPA). The spectral as well as the correlation function in PNJL model show that the vector meson retains its bound property up to a moderate value of temperature above the phase transition. Using the vector meson spectral function we, for the first time, obtained the dilepton production rate from a hot and dense medium within the framework of PNJL model that takes into account the nonperturbative effect through the Polyakov Loop fields. The dilepton production rate in PNJL model is enhanced compared to NJL and Born rate in the deconfined phase due to the suppression of color degrees of freedom at moderate temperature. The presence of isoscalar-vector interaction further enhances the dileption rate over the Born rate in the low mass region. Further, we also have computed the Euclidean correlation function in vector channel and the conserved density fluctuation associated with temporal correlation function appropriate for a hot and dense medium. The dilepton rate and the Euclidean correlator are also compared with available lattice data and those quantities in PNJL model are found to agree well in certain domain.

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Section: Jhep02(2015)011mentioning

confidence: 99%

Vector meson spectral function and dilepton production rate in a hot and dense medium within an effective QCD approach

Islam

Majumder

Haque

et al. 2015

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

Critical Line Back-Bending Induced either by Finite <i>N<sub>c</sub></i> Corrections or by a Repulsive Vector Channel

Abstract: We analyze the two flavor version of the Nambu-Jona-Lasinio model with a repulsive vector coupling , at finite temperature and quark chemical potential, in the strong scalar coupling

Cited by 1 publication

References 18 publications

Vector meson spectral function and dilepton production rate in a hot and dense medium within an effective QCD approach

Vector meson spectral function and dilepton production rate in a hot and dense medium within an effective QCD approach

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