BBN Constraints on $f(Q,T)$ Gravity

Abstract

$f(Q,T)$ gravity is a novel extension of the symmetric teleparallel gravity where the Lagrangian $L$ is represented through an arbitrary function of the nonmetricity $Q$ and the trace of the energy-momentum tensor $T$ \cite{fqt}. In this work, we have constrained a widely used $f(Q,T)$ gravity model of the form $f(Q,T)=Q^{n+1}+mT$ from the primordial abundances of the light elements to understand its viability in Cosmology. We report that the $f(Q,T)$ gravity model can elegantly explain the observed abundances of Helium and Deuterium while the Lithium problem persists. From the constraint on the expansion factor in the range $0.9425\lesssim Z\lesssim 1.1525$, we report strict constraints on the parameters $m$ and $n$ in the range $-1.13\lesssim n\lesssim -1.08$ and $-5.86\lesssim m\lesssim 12.52$ respectively.

References in corpus (20)

• f(R,T) gravity
• The trouble with $H_0$
• Primordial Nucleosynthesis in the Precision Cosmology Era
• The Primordial Lithium Problem
• The effects of He I 10830 on helium abundance determinations
• Extended Gravity Cosmography
• Quantum Tests of the Einstein Equivalence Principle with the STE-QUEST Space Mission
• Dark Matter From f(R,T) Gravity
• Late universe decaying dark matter can relieve the H_0 tension
• Big Bang Nucleosynthesis constraints on Barrow entropy
• The primordial deuterium abundance of the most metal-poor damped Lyman-alpha system
• $f(Q,T)$ gravity models with observational constraints
• Constraining The Early-Universe Baryon Density And Expansion Rate
• Cosmological implications of modified gravity induced by quantum metric fluctuations
• Slow-roll inflation in f(R,T) gravity and a modified Starobinsky-like inflationary model
• Inflation in $f(R,T)$ Gravity
• Modified gravity from the nonperturbative quantization of a metric
• Big Bang Nucleosynthesis and Entropy Evolution in $f(R,T)$ Gravity
• Temporally Varying Universal Gravitational "Constant" and Speed of Light in Energy Momentum Squared Gravity
• Mapping Poincaré gauge cosmology to Horndeski theory for emergent dark energy

Cited by in corpus (3)

• New models and Big Bang Nucleosynthesis constraints in $f(Q)$ gravity
• Cosmological Perturbation Theory in $f(Q,T)$ Gravity
• Metric-affine Myrzakulov gravity theories with Gauss-Bonnet and boundary term scalars