Peter Bantis | Aristotle University of Thessaloniki (original) (raw)

Papers by Peter Bantis

(Anti)hyperons from the scope of momentum-dependent mean fields, 2024

The purpose of this thesis is to investigate the behavior of (anti)hyperons within the framework ... more The purpose of this thesis is to investigate the behavior of (anti)hyperons within the framework of momentum-dependent mean fields. The study focuses on the role of hyperons in dense nuclear matter, which is crucial for understanding the properties of neutron stars and heavy-ion collisions. The theoretical framework employed combines elements of relativistic mean-field (RMF) theory and non-linear derivative (NLD) models. These approaches are applied to analyze the optical potentials of hyperons and anti-hyperons as functions of their momentum in both symmetric nuclear matter and pure neutron matter at various densities. The mathematical formalism that describes the Field Theory and the basic principles of the Relativistic Mean Field Theory are also analyzed. Key results include the comparison of NLD model predictions with recent lattice QCD and chiral effective field theory (χ-EFT) calculations. The findings provide insights into the interactions and stability of hyperons in dense environments, contributing to the broader understanding of nuclear and particle physics. This work represents a significant step in the development of more accurate models for describing hyperonic matter in extreme conditions.

During the last decades the discovery of Super Heavy Elements (SHE) with atomic number Z=113-118 ... more During the last decades the discovery of Super Heavy Elements
(SHE) with atomic number Z=113-118 was a major breakthrough of
the scientific community. For the identification and research of those
new nuclides the Isotope Separator On-Line (ISOL) method was developed
and applied successfully. At FLNR, the Mass Analyzer of Super
Heavy Atoms (MASHA) was deployed in order to measure accurately
on-line the mass-to-charge ratio of the SHE isotopes and their respective
α-decay. In this paper construction, working method and possible
upgrades of the MASHA setup are discussed. Furthermore, alpha decay
energies of different isotopes of Hg, Rn which are produced from
heavy ion fusion evaporation reactions are examined thoroughly. Finally,
one dimensional histograms and heatmaps have been created by
modelling data from the experiments done in FLNR,JINR.

The purpose of this thesis is to introduce the reader to the Quantum Hadrodynamics Model (QHD) wh... more The purpose of this thesis is to introduce the reader to the Quantum Hadrodynamics Model (QHD) which is used to interpret and model nuclear matter. The mathematical formalism that describes the Field Theory and the basic principles of the Relativistic Mean Field Theory are also analyzed. The first and the second chapter consist of a thorough introduction to the definition of nuclear matter and its properties. In the next chapter the necessary theoretical and mathematical background is analyzed. Furthermore, reference is made to Tensor Calculus, Special Theory of Relativity, Lagrange/Hamilton mechanics and Relativistic Quantum Mechanics with emphasis on Dirac and Klein-Gordon equations. In the fourth chapter we approach the field theory topic. We start form the basic classical field theory and after we briefly explain the conservation laws we move to analyze the Quantum field theory. The fifth chapter acquaints us with Quantum Hadrodynamics (QHD) through the linear model QHD-I under the approach of the Relativistic Mean Field Theory (RMFT). Some configurations/extensions are also discussed that lead to more precise modeling of the nuclear matter.

Introduction to Relativistic Mean Field Theory, 2020

With this paper we will try to introduce the foundations and the formalism of relativistic mean f... more With this paper we will try to introduce the foundations and the formalism of relativistic mean field theory and its applications. We begin by discussing the formulation of the theory of special relativity. Then we derive the Lagrangian formulation of a field from the continuous limit of a discrete system. Afterwards, we formulate a relativistically invariant Lagrangian for a field and use the previous formalism to investigate several problems of continuous systems. Finally, reference is made to the application of the mean field approximation to the nuclear model of Quantum Hadrodynamics (QHD).

Conference Presentations by Peter Bantis

AB INITIO AND MOLECULAR DYNAMICS, 2022

(Anti)hyperons from the scope of momentum-dependent mean fields, 2024

The purpose of this thesis is to investigate the behavior of (anti)hyperons within the framework ... more The purpose of this thesis is to investigate the behavior of (anti)hyperons within the framework of momentum-dependent mean fields. The study focuses on the role of hyperons in dense nuclear matter, which is crucial for understanding the properties of neutron stars and heavy-ion collisions. The theoretical framework employed combines elements of relativistic mean-field (RMF) theory and non-linear derivative (NLD) models. These approaches are applied to analyze the optical potentials of hyperons and anti-hyperons as functions of their momentum in both symmetric nuclear matter and pure neutron matter at various densities. The mathematical formalism that describes the Field Theory and the basic principles of the Relativistic Mean Field Theory are also analyzed. Key results include the comparison of NLD model predictions with recent lattice QCD and chiral effective field theory (χ-EFT) calculations. The findings provide insights into the interactions and stability of hyperons in dense environments, contributing to the broader understanding of nuclear and particle physics. This work represents a significant step in the development of more accurate models for describing hyperonic matter in extreme conditions.

During the last decades the discovery of Super Heavy Elements (SHE) with atomic number Z=113-118 ... more During the last decades the discovery of Super Heavy Elements
(SHE) with atomic number Z=113-118 was a major breakthrough of
the scientific community. For the identification and research of those
new nuclides the Isotope Separator On-Line (ISOL) method was developed
and applied successfully. At FLNR, the Mass Analyzer of Super
Heavy Atoms (MASHA) was deployed in order to measure accurately
on-line the mass-to-charge ratio of the SHE isotopes and their respective
α-decay. In this paper construction, working method and possible
upgrades of the MASHA setup are discussed. Furthermore, alpha decay
energies of different isotopes of Hg, Rn which are produced from
heavy ion fusion evaporation reactions are examined thoroughly. Finally,
one dimensional histograms and heatmaps have been created by
modelling data from the experiments done in FLNR,JINR.

The purpose of this thesis is to introduce the reader to the Quantum Hadrodynamics Model (QHD) wh... more The purpose of this thesis is to introduce the reader to the Quantum Hadrodynamics Model (QHD) which is used to interpret and model nuclear matter. The mathematical formalism that describes the Field Theory and the basic principles of the Relativistic Mean Field Theory are also analyzed. The first and the second chapter consist of a thorough introduction to the definition of nuclear matter and its properties. In the next chapter the necessary theoretical and mathematical background is analyzed. Furthermore, reference is made to Tensor Calculus, Special Theory of Relativity, Lagrange/Hamilton mechanics and Relativistic Quantum Mechanics with emphasis on Dirac and Klein-Gordon equations. In the fourth chapter we approach the field theory topic. We start form the basic classical field theory and after we briefly explain the conservation laws we move to analyze the Quantum field theory. The fifth chapter acquaints us with Quantum Hadrodynamics (QHD) through the linear model QHD-I under the approach of the Relativistic Mean Field Theory (RMFT). Some configurations/extensions are also discussed that lead to more precise modeling of the nuclear matter.

Introduction to Relativistic Mean Field Theory, 2020

With this paper we will try to introduce the foundations and the formalism of relativistic mean f... more With this paper we will try to introduce the foundations and the formalism of relativistic mean field theory and its applications. We begin by discussing the formulation of the theory of special relativity. Then we derive the Lagrangian formulation of a field from the continuous limit of a discrete system. Afterwards, we formulate a relativistically invariant Lagrangian for a field and use the previous formalism to investigate several problems of continuous systems. Finally, reference is made to the application of the mean field approximation to the nuclear model of Quantum Hadrodynamics (QHD).

AB INITIO AND MOLECULAR DYNAMICS, 2022