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Proper time regularization and the QCD chiral phase transition.

Zhu-Fang Cui1,2, Jin-Li Zhang1, Hong-Shi Zong1,2,3

  • 1Department of Physics, Nanjing University, Nanjing, 210093, China.

Scientific Reports
|April 13, 2017
PubMed
Summary
This summary is machine-generated.

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The study explores the QCD chiral phase transition using the Nambu-Jona-Lasinio model. Findings reveal the transition

Area of Science:

  • * Quantum Chromodynamics (QCD) and its phase transitions.
  • * Theoretical particle physics and condensed matter physics.
  • * Nuclear physics and high-energy physics.

Background:

  • * Understanding the QCD phase diagram is crucial for comprehending matter under extreme conditions.
  • * The Nambu-Jona-Lasinio (NJL) model is a widely used effective theory for studying QCD phenomena.
  • * Regularization schemes significantly influence theoretical model predictions.

Purpose of the Study:

  • * To investigate the QCD chiral phase transition at finite temperature and quark chemical potential.
  • * To implement a generalized proper-time regularization scheme within the two-flavor NJL model.
  • * To analyze the impact of the regularization scheme on phase transition properties and the appearance of a critical endpoint (CEP).

Main Methods:

Related Experiment Videos

  • * Employing the two-flavor Nambu-Jona-Lasinio (NJL) model.
  • * Implementing a generalized proper-time regularization scheme.
  • * Analyzing the QCD phase diagram at finite temperature and quark chemical potential.

Main Results:

  • * In the chiral limit, the entire transition line is second-order.
  • * For finite quark masses, a crossover is observed.
  • * Including quark condensate effects on coupling strength suggests the possible appearance of a critical endpoint (CEP).

Conclusions:

  • * The chosen regularization scheme has a dramatic impact on NJL model studies of the QCD phase transition.
  • * Results differ substantially from those obtained with alternative regularization schemes.
  • * This highlights the importance of carefully selecting and implementing regularization methods in theoretical physics.