The main focus of the group is on Hadron Physics, Neutron stars, few-body systems in nuclear physics, and ion sources. Hadrons are the main building blocks of nuclei, neutron stars, and many subatomic particles. As a result, the investigation of hadrons plays an important role in understanding our world. The best, and most common way, to study the structure and dynamics of hadrons and subatomic particles is to use the high energy particles, produced at particle accelerators. The members of the group are

A part of our activities is under High Energy Physics-Phenomenology within the " Hadronic Structure-QCD Collaboration" (for more information visit the link:  http://physics.ut.ac.ir/~azizi/localhost/hep-test/wordpress/index.html ).

The high energy physics-phenomenology plays an important role in our understanding of the universe. It connects the existing theories to the large experiments carried out around the world on particle physics: Like CERN, Fermilab, etc. The strong interaction is one of the four fundamental interactions governing our universe. The best laboratory to get complete knowledge on Quantum Chromodynamics (QCD) as the quantum field theory of the strong interaction is hadron physics. Within this Collaboration, we investigate different aspects of hadrons & QCD. 

Some of our interests are:

  • Perturbative and Non-perturbative natures of QCD. 
  • Particle Phenomenology                                                                                 
  • Formation and Structure of the Standard Hadrons and Exotics
  • Nucleon Structure Functions, PDFs, NPDFs, GPDFs, GDAs, TDAs & TMDs
  • Intrinsic Quarks and Their Application in Determination of Hadronic Parameters
  • Multipole Moments of Hadrons and Their Geometric Shapes
  • Electromagnetic, Weak and Strong Decays of the Standard Hadrons and the Exotic States
  • Two-point, Three-point, and Light Cone QCD Sum Rules.                 
  • Finite Temperature QCD and its Applications in Hadron Physics,
  • Hadronic Properties at Dense Medium
  • Application of Some New Physics Scenarios in Hadron Physics 
  • Search for Dark Matter and Dark Energy in General & in QCD.               
  • Machine Learning and its Application in Particle Physics.

 

The Collaboration has close relations with hadron colliders around the globe and is involved in scientific activities in ALICE Collaboration at CERN as well as PANDA Experiment in Germany. 

Particle accelerators receive ions from ion sources. Ions are usually extracted from plasma. The extracted ions are formed to a low energy ion beam by employing electrostatic lenses. Depending on the required energy, from eV to TeV, the beams are de/accelerated. Ion sources have a wide application in science and industry. For instance, our knowledge about Nuclear and Particle physics would not grow to the present point without particles accelerators and ion sources. Further development of these fields is also impossible without the technological development of accelerators. Ion implantation and mass spectroscopy are of most significant industrial applications of ion sources and particle accelerators.

Our Ion sources and ion beam lab is equipped with a positive penning ion source and a negative hydrogen ion source. The positive penning ion source provides beams for a 100 keV accelerator column which delivers a few mu A beams from gaseous sources. In this lab, we are dedicated to the development of ion sources. In addition, we have a close collaboration with other research labs in our department to conduct interdisciplinary research using the ions beams produced in our lab.

Simulation electric discharge in gases is a very important tool in the development and comprehending of the dynamics of ion sources. Always, part of our team is involved in the development and application of PIC and Fluidic simulation codes to study electric discharges in the ion sources. For further information, you are invited to visit the webpage of our lab  http://physics.ut.ac.ir/~shafiei/ionbeamslab/

The Equation of state (EOS) of a dense many-body system plays an essential role in understanding nuclear and sub-nuclear systems.  Realistic two and three-body interactions in baryonic systems are essential input for the microscopic approaches to finding EOS. Knowledge about exotic matter EOS under extreme density and pressure conditions can help to describe some important phenomena like compact stars, Heavy Ion collisions, Quark-Gluon plasma, and hadron-quark phase transition. 

Compact stars, such as neutron stars, strange stars, or hybrid stars, are unique laboratories that allow us to probe the building blocks of matter and their interactions at regimes that terrestrial laboratories cannot explore. These exceptional objects have already led to breakthrough discoveries in nuclear and subnuclear physics, QCD, general relativity, and high-energy astrophysics. So our research group mainly focuses on compact stars. 

Our major research interests are: 

-Develop many-body methods 

-Two and three-body interaction between baryons (nucleons and Hyperons)

-Exotic matter equation of state

-structure of compact stars 

-Hadron-Quark phase transition