Seminar

Seminar program:

1. B. Saha, M. Goray (Jharkhand, India)

   Spinor Field Dark Energy in FLRW Space-time: Theory and Observation

   Abstract:

   This study explores the cosmological parameters within the framework of a spherically symmetric Friedmann-Lemaître-Robertson-Walker (FLRW) cosmological model, focusing on the influence of a nonlinear spinor field on the evolution of the universe. To validate this approach, we utilize recent data from Cosmic Chronometers, Supernovae, and the Sloan Digital Sky Survey.

   Our findings indicate that in spherical coordinates, the FLRW model reveals the energy-momentum tensor (EMT) of the spinor field to have nontrivial non-diagonal components. Notably, these non-diagonal components of the EMT are independent of the nonlinear characteristics of the spinor field and the parameter k, which defines the type of curvature in the FLRW model.

   Based on this framework, we develop a dark energy model and perform a Markov Chain Monte Carlo (MCMC) simulation to obtain the best-fit values for the parameters. The results align well with the current Hubble parameter and deceleration parameter, suggesting that the universe is undergoing accelerated expansion.

2. G. Musulmanbekov

   Report on scientific activities in the period 2020–2025

   1. Participation in the BM@N, SRC, and MPD collaborations
   2. Participation in the development of modification of the DCM-QGSM incorporating the statistical multifragmentation mechanism (SMM).
   3. Modeling and analysis of proton-nucleus and nucleus-nucleus collisions for the BM@N, SRC, and MPD experiments
   4. Development of the quark model of nuclear structure (SCQM).

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