BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Flash Talk: Modified Chaplygin gas with recent observations in f(Q
 \,B) gravity
DTSTART;VALUE=DATE-TIME:20261116T080200Z
DTEND;VALUE=DATE-TIME:20261116T080400Z
DTSTAMP;VALUE=DATE-TIME:20261026T151156Z
UID:indico-contribution-974@indico.narit.or.th
DESCRIPTION:Speakers: Dr. Sanasam Surendra Singh (NIT MANIPUR)\nIn this wo
 rk\, we explore the cosmological dynamics of a modified gravity framework 
 based on the function $f(Q\,B)=\\delta Q^{2}+\\beta B$\, where $Q$ denotes
  the nonmetricity scalar and $B$ is the boundary term that relates $Q$ to 
 the Ricci scalar. The matter sector is modeled using the Modified Chaplygi
 n Gas (MCG) with the equation of state $p=A\\rho-\\frac{D_{1}}{\\rho^{\\al
 pha}}$\, allowing the model to interpolate between early-time matter behav
 ior and late-time cosmic acceleration. By deriving an analytical expressio
 n for the Hubble parameter $H(z)$\, we perform a parameter estimation usin
 g Markov Chain Monte Carlo (MCMC) techniques in conjunction with the lates
 t cosmological observations: $46$ Hubble parameter measurements\, $15$ BAO
  data points\, DESI DR2 BAO data and the Pantheon+ Type Ia supernovae comp
 ilation. The best-fit values are obtained as $H_0=72.2814^{+3.4702}_{-4.52
 09}$ km/s/Mpc\, $A_s = 0.6964^{+0.0779}_{-0.1258}$\, $\\alpha = 0.0027^{+0
 .0225}_{-0.0209}$ and $A = 0.0024^{+0.0702}_{-0.0464}$. The deceleration p
 arameter transitions at redshift $z_{tr} \\approx 0.946$\, while the prese
 nt-day value is $q_0 = -0.789$. The model yields an age of the Universe $t
 _0 \\approx 13.53$ Gyr and a present EoS parameter $\\omega_0 \\approx -0.
 691$\, which reflects the late-time acceleration consistent with observati
 onal bounds. These results demonstrate that the MCG scenario within $f(Q\,
 B)$ gravity provides a viable and observationally consistent framework for
  explaining the late-time accelerated expansion of the Universe.\n\nhttps:
 //indico.narit.or.th/event/234/contributions/974/
LOCATION:Pattaya\, Thailand D Varee Jomtien Beach Pattaya Hotel
URL:https://indico.narit.or.th/event/234/contributions/974/
END:VEVENT
END:VCALENDAR