{
  "abstract": "In this work, we investigate a CPL-type $Om(z)$ parametrization given by $Om(z)=l+m\\left(\\frac{z}{1+z}\\right)$ to study the evolution of dark energy and possible deviations from the standard $Λ$CDM cosmology. The model reduces to the flat $Λ$CDM scenario for $m=0$, while $m\\neq0$ indicates dynamical evolution. The free parameters are constrained using Pantheon+SH0ES (PPS), Cosmic Chronometer (CC), and DESI BAO DR2 observations through Markov Chain Monte Carlo analysis. The obtained constraints yield $72.48\\lesssim H_0\\lesssim72.97~\\mathrm{km\\,s^{-1}\\,Mpc^{-1}}$, while the evolution parameter remains negative for all dataset combinations, leading to decreasing $Om(z)$ evolution and favoring quintessence-like behaviour. The combined PPS+CC+DR2 analysis shifts the evolution closer to the $Λ$CDM limit. The statistical analysis based on $χ^2$, AIC, and BIC indicates that the proposed model remains statistically competitive with $Λ$CDM. The deceleration parameter and total equation of state are further analyzed to examine the cosmic evolution. The transition from deceleration to acceleration occurs within $z_{tr}\\approx0.66-1.01$, while the present values vary within $-0.459\\lesssim q_0\\lesssim-0.325$ and $-0.639\\lesssimω_0\\lesssim-0.550$ depending on the datasets. Overall, the proposed parametrization provides a flexible framework for studying late-time cosmic evolution.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.04229",
  "author_total": 3,
  "authors": [
    {
      "name": "D. Revanth Kumar"
    },
    {
      "name": "Santosh Kumar Yadav"
    },
    {
      "name": "S. A. Kadam"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6p0xhad7nndfq.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.04229",
  "fulltext_url": null,
  "id": "6p0xhad7nndfq",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.04229",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.gen-ph"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7211892984",
  "pdf_url": "https://arxiv.org/pdf/2609.04229",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6p0xhad7nndfq.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:14Z",
      "native_id": "2609.04229",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.04229"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Cosmology and Gravitation Theories",
      "subfield": "cosmology"
    }
  ],
  "title": "Probing dark energy dynamics through a new CPL-type $Om(z)$ parametrization in FLRW Universe",
  "title_text": "Probing dark energy dynamics through a new CPL-type Om(z) parametrization in FLRW Universe",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:14Z",
  "url": "https://research.draconitic.com/paper/6p0xhad7nndfq",
  "venue": "arXiv",
  "versions": []
}