Hadronic matter at zero and finite temperature in the description of compact stars

• Grant number: 25/06216-2
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: November 01, 2025
• End date: October 31, 2028
• Field of knowledge: Physical Sciences and Mathematics - Physics - Nuclear Physics
• Principal Investigator: Odilon Lourenço da Silva Filho
• Grantee: Carline Biesdorf
• Host Institution: Divisão de Ciências Fundamentais (IEF). Instituto Tecnológico de Aeronáutica (ITA). São José dos Campos , SP, Brazil

Abstract

This project aims to investigate hadronic matter at zero and finite temperature, focusing on its role in the description of compact stars. The first part of the study explores the impact of short-range correlations on the stability of neutron stars and white dwarfs admixed with dark matter. The project employs a two-fluid formalism to model the interaction between ordinary and dark matter, extending previous analyses by incorporating Bayesian inference to constrain the equation of state. The research will assess mass-radius relations and stability conditions, providing insight into the nature of compact astrophysical objects. The second part of the project addresses finite-temperature effects, linking heavy-ion collision experiments with neutron star physics. It examines hot hadronic, quark, and hybrid matter by extending relativistic mean-field models and employing Bayesian inference to refine constraints. The study further explores the thermal index its dependence on additional degrees of freedom, and its impact on astrophysical simulations. This comprehensive approach aims to enhance our understanding of the QCD phase diagram, hadron-quark phase transitions, and the behavior of dense matter under extreme conditions. By integrating theoretical models, numerical methods, and observational constraints, this research will contribute to advances in nuclear astrophysics, improving predictions on compact star structure and the interplay between dark matter, short-range correlations, and finite-temperature effects. (AU)