2024/10/06 by Samaddar, Amit, Singh, S. Surendra · 1 citation
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th)
paper · doi:10.48550/arxiv.2410.05335
We present an examination of the f(Q,Lm) gravity model, in which the functional form f(Q,Lm)=αQn+βLm is postulated and discuss its potential impact on cosmological dynamics and the phenomenon of gravitational baryogenesis. Combining observational insights from Hubble, BAO and phantom datasets, we conduct a comprehensive analysis to constrain the model's parameters and determine the baryon-to-entropy ratio \fracηBs, providing valuable insights into the model's performance and cosmological implications. In the context of baryogenesis and generalized gravitational baryogenesis, we show that setting n=(1)/(2) results in a zero baryon-to-entropy ratio, which is physically implausible. Through a detailed examination of the dependence of \fracηBs on n and β, we demonstrate that our model predicts a baryon-to-entropy ratio that is both positive and consistent with the observational upper limit of 9.42×10-11 for 1.32965