Research Statement

I am currently assistant professor at the University of Birjand, Iran in the Department of science since March 2015, with an interest in contributing to a deeper understanding of the origin of particles and the universe. The interaction between quarks and gluons is very strong and complicated. Lattice QCD is a theoretical method to investigate this complicated strong dynamic of QCD based on the first principles. Our studies, which are not only theoretical investigations on QCD, but also include constructing high performance supercomputers specialized for QCD computations, or developments for better algorithms to accelerate calculations, are about to lead us to achieve solid understandings about various facets of QCD without any compromise.

Research history

1. Master thesis: I have worked on "Calculation of energy levels of deformed nuclei in Nilsson Model".

2. Ph.D thesis: We obtained the N (nucleon)–Ω (Omega) interaction in lattice QCD to seek for possible dibaryon states in the strangeness −3 channel. We have calculated the N-Ω potential through the equal-time Nambu–Bethe–Salpeter wave function in 2 +1- flavor lattice QCD. We found one bound state whose binding energy is 18.9 MeV. We also calculated the scattering length and effective range of this system.

3. In another job, We compared the standard finite volume method by Lüscher with the potential method by HAL QCD collaboration, by calculating the ground state energy of N(nucleon)-Ω(Omega) system , We have found that both methods give reasonably consistent results that there is one NΩ bound state at same input parameters.

4. We have investigated the couple channel Interactions from full lattice QCD simulation (2+1 flavor) on lattice with size at the lattice spacing . The quark mass in our study corresponds to MeV, while the s and c quark masses correspond to MeV and MeV, respectively. The central potential and scattering parameters are calculated from Coupled Channel HAL QCD method.

5. I have studied Omega-deuteron and Xi-deuteron interaction by using single folding potentials method.

6. I employed the two-body potential derived by HAL QCD group from Lattice QCD simulations to few-body systems like: Y Y –hypernuclei.

7. I developed a Faddeev three-body equations to search for bound-state solutions of a phi-meson (\phi) and two nucleons (NN) system, $\Omega N N$ and $\Omega Omega N$ three-body systems.

8. And, very recently, I have used the two-body potential derived from lattice QCD to build the hadron-alpha single folding potential and then the correlation functions are predicted for systems like $\Omega-\alpha$ and $\phi-\alpha$.

Research plans

High energy heavy ion collisions are an excellent method for creating heavy hadrons and light (anti)nuclei, includes molecular states made of various hadrons or compact system. One method for studying the hadron-hadron interaction that is hard to investigate in classical scattering experiment is measuring the momentum correlation functions in high-energy collisions. Since the three-nucleon forces play an important role in precision calculations of nuclei and nuclear matter, as the next step in the femtoscopic analyses, the hadron-deuteron correlation functions would be promising. In order to accurately predict the correlation function theoretically, it is necessary to determine the wave function of the many-body system using modern methods.

Currently, I am working on three-body correlation function. I am developing my Faddeev three-body code which is based on the hyperspherical harmonics, to calculate the scattering wave function of a three-body systems. Of all the ab initio calculations, Nuclear Lattice Effective Field Theory (NLEFT) method is advantageous for solving many-nucleon problems like bound states of medium-mass nuclei and alpha-alpha scattering. Thanks to the very recently introduced method in NLEFT for many-nucleon systems, the “wavefunction matching method” at next-to-next-to-next-to-leading order (N3LO) in the chiral expansion, now it is possible to resolve long-standing challenges in accurately reproducing nuclear binding energies, charge radii and nuclear-matter saturation in ab initio calculations