Observational constraints on parameterized deceleration parameter with f(Q,T) gravity

In the current analysis, we considered a spatially flat FRW universe with f(Q,T) gravity. To understand the dark energy via the equation of state, we start with the phenomenological parametrization of the deceleration parameter q(z). One of the most preferred parametrizations of the dark energy equation of state served as the idea for the deceleration parameter. The best-fit value of zt (the redshift at which the universe transitions from before decelerating to the present accelerating phase) and the current value of the deceleration parameter are explored. The negative behavior indicates that the universe is accelerating, which can be verified from the combined datasets (CC + SC + unCor BAO). Additionally, we examine the current scenario of the well-reconstructed q(z) and omega(z) fitting behavior via Lambda CDM. As we are working within f(Q,T) gravity, so, two specific models like f(Q,T) = alpha Q + beta T and f(Q,T) = alpha(1)Q(2) + beta T-1 with alpha, alpha(1), beta model parameters are considered to complete the current analysis. Last, we have concluding remarks regarding the current analysis.