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SUMMARY:Contributory: From CPL to Canonical Fields: Constraining Quintesse
 nce with the Tomographic AP Test
DTSTART;VALUE=DATE-TIME:20261116T061500Z
DTEND;VALUE=DATE-TIME:20261116T063000Z
DTSTAMP;VALUE=DATE-TIME:20261026T194624Z
UID:indico-contribution-946@indico.narit.or.th
DESCRIPTION:Speakers: Zahra Davari (Korea Institute for Advanced Study (KI
 AS))\nThe nature of dark energy remains one of the central open questions 
 in cosmology. While observational analyses commonly constrain phenomenolog
 ical equation-of-state parametrizations such as the Chevallier–Polarski
 –Linder (CPL) model\, theoretical interpretations require translating th
 ese constraints into physically motivated scalar-field models.\n\nWe prese
 nt a computational framework that directly maps observational likelihoods 
 in the $(\\Omega_m\,w_0\,w_a)$ parameter space onto the parameter spaces o
 f canonical quintessence potentials without recomputing the full observati
 onal likelihood. The method employs likelihood-guided mapping based on the
  tomographic Alcock–Paczyński test combined with Type Ia supernova and 
 baryon acoustic oscillation observations. For each potential\, we solve th
 e scalar-field background evolution numerically and determine an effective
  CPL representation over the observed redshift range\, allowing observatio
 nal constraints to be projected efficiently onto the underlying theoretica
 l parameters.\n\nWe apply this approach to exponential\, pseudo–Nambu–
 Goldstone boson (PNGB)\, and inverse power-law (IPL) quintessence models. 
 The resulting constraints reveal that viable scalar-field models occupy on
 ly a narrow region of the effective CPL parameter space\, considerably sma
 ller than the full phenomenological CPL posterior. This demonstrates how t
 heoretical consistency substantially reduces the allowed dark-energy param
 eter space and provides a practical route for confronting fundamental dark
 -energy models with current and future cosmological observations.\n\nhttps
 ://indico.narit.or.th/event/234/contributions/946/
LOCATION:Pattaya\, Thailand D Varee Jomtien Beach Pattaya Hotel
URL:https://indico.narit.or.th/event/234/contributions/946/
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