Effects of a first-order QCD phase transition on the enhancement of light nucleus yield ratio

Summary

The study investigates the effects of a first-order QCD phase transition on the enhancement of light nucleus yield ratios using an extended Nambu-Jona-Lasinio model. The results indicate that the second-order scalar density moment rapidly increases to form a peak when the isentropic trajectories pass through the coexistence region, leading to significant enhancements in the yield ratios at 19.6 GeV and 27 GeV.

Highlights

• The study uses an extended Nambu-Jona-Lasinio model to describe the baryon density fluctuations of quark matter.
• The model includes three eight-quark interactions and takes into account the vector-scalar interaction coupling constant.
• The results show that the second-order scalar density moment is directly related to the light nucleus yield ratios.
• The yield ratios are enhanced in the coexistence region, especially on the left side of the coexistence region.
• The enhancements in the yield ratios are observed at 19.6 GeV and 27 GeV.
• The study suggests that the enhancements in the yield ratios are due to the density fluctuations generated in the first-order phase transition region.
• The results are consistent with the trends observed by the STAR experiment.

Key Insights

• The study provides a new insight into the effects of a first-order QCD phase transition on the enhancement of light nucleus yield ratios. The results suggest that the density fluctuations generated in the first-order phase transition region lead to significant enhancements in the yield ratios.
• The use of an extended Nambu-Jona-Lasinio model with three eight-quark interactions allows for a more detailed description of the baryon density fluctuations of quark matter. This provides a more accurate understanding of the effects of the first-order phase transition on the yield ratios.
• The study highlights the importance of considering the vector-scalar interaction coupling constant in the model. This constant plays a crucial role in determining the critical point and the coexistence region of the phase diagram.
• The results of the study are consistent with the trends observed by the STAR experiment. This suggests that the enhancements in the yield ratios observed in the experiment may be due to the density fluctuations generated in the first-order phase transition region.
• The study provides a new perspective on the interpretation of the experimental results. The enhancements in the yield ratios may not be solely due to the critical region, but also due to the density fluctuations generated in the first-order phase transition region.
• The study has implications for our understanding of the QCD phase diagram and the effects of a first-order phase transition on the enhancement of light nucleus yield ratios. The results suggest that the density fluctuations generated in the first-order phase transition region play a crucial role in determining the yield ratios.
• The study highlights the need for further research into the effects of a first-order QCD phase transition on the enhancement of light nucleus yield ratios. The results suggest that a more detailed understanding of the density fluctuations generated in the first-order phase transition region is necessary to fully understand the experimental results.

Mindmap

Citation

Liu, H., Sun, K.-J., & Chu, P.-C. (2024). Effects of a first-order QCD phase transition on the enhancement of light nucleus yield ratio (Version 1). arXiv. https://doi.org/10.48550/ARXIV.2412.17621