{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/j-pas-and-pfs-surveys-in-the-era-of-dark","title":"J-PAS and PFS surveys in the era of dark energy and neutrino mass measurements","arxiv_id":"2505.04275","date":"2025-05-07","proceeding":null,"authors":["Fuxing Qin","Yuting Wang","Gong-Bo Zhao","Antonio J. Cuesta","Jailson Alcaniz","Gabriel Rodrigues","Miguel Aparicio Resco","Antonio Lopez Maroto","Manuel Masip","Jamerson G. Rodrigues","Felipe B. M. dos Santos","Javier de Cruz Perez","Jorge Enrique Garcia-Farieta","Raul Abramo","Narciso Benitez","Silvia Bonoli","Saulo Carneiro","Javier Cenarro","David Cristobal-Hornillos","Renato Dupke","Alessandro Ederoclite","Antonio Hernan-Caballero","Carlos Hernandez-Monteagudo","Carlos Lopez-Sanjuan","Antonio Marin-Franch","Claudia Mendes de Oliveira","Mariano Moles","Laerte Sodre Jr.","Keith Taylor","Jesus Varela","Hector Vazquez Ramio"],"abstract":"Fisher-matrix forecasts are presented for the cosmological surveys of the Javalambre Physics of the Accelerating Universe Astrophysical Survey (J-PAS) and the Subaru Prime Focus Spectrograph (PFS). The wide, low-redshift coverage of J-PAS and the high-density, high-redshift mapping of PFS are strongly complementary: combining the two reduces marginalized uncertainties on all primary parameters compared with either survey individually. Adding the joint J-PAS+PFS data to next-generation CMB measurements from the Simons Observatory (SO) and \\textsc{LiteBird} yields an expected precision of $\\sigma(\\sum m_\\nu)=0.017\\,$eV in the $\\Lambda$CDM$+\\sum m_\\nu+N_{\\rm eff}$ framework, sufficient to disfavour the inverted neutrino hierarchy at $2.34\\,\\sigma$ if the true mass sum equals the normal-ordering minimum. Motivated by recent DESI results, we also forecast within a $w_0w_a$CDM$+\\sum m_\\nu+N_{\\rm eff}$ cosmology, adopting the DESI\\,DR2 best-fit values ($w_0=-0.758$, $w_a=-0.82$) as fiducial. The combination CMB+J-PAS+PFS then delivers $\\sigma(w_0)=0.044$ and $\\sigma(w_a)=0.18$, corresponding to a $5.1\\,\\sigma$ preference for a time-varying dark-energy equation of state. These findings show that J-PAS and PFS, especially when coupled with Stage-IV CMB observations, will provide competitive tests of neutrino physics and the dynamics of cosmic acceleration.","url_abs":"https://arxiv.org/abs/2505.04275v1","url_pdf":"https://arxiv.org/pdf/2505.04275v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"j-pas-and-pfs-surveys-in-the-era-of-dark","repo_url":"https://github.com/striker-png/neutrinoforecast_j-pas_pfs","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}