Dark Energy Survey: DESI-independent angular BAO measurement

Journal Article · Thu Jun 11 00:00:00 UTC 2026 · Phys.Rev.D

DOI: https://doi.org/10.1103/d474-zzzf · OSTI ID:3016043

Mena-Fernández, J.  ^[1]; Avila, S. ^[2]; Porredon, A. ^[3]; Camacho, H. ^[4]; Muir, J. ^[5]; Sanchez, E. ^[2]; Adamow, M. ^[6]; Bechtol, K. ^[7]; Camilleri, R. ^[8]; Campailla, G. ^[9]; Davis, T. M. ^[8]; Deiosso, N. ^[2]; Doux, C. ^[10]; Drlica-Wagner, A. ^[11]; Ferté, A. ^[12]; Gruendl, R. A. ^[13]; Hartley, W. G. ^[14]; Pieres, A. ^[15]; Raveri, M. ^[9]; Rykoff, E. S. ^[16] ; Sevilla-Noarbe, I. ^[2]; Shah, P. ^[17]; Sheldon, E. ^[18]; Vincenzi, M. ^[19]; Yanny, B. ^[20]; Abbott, T. M.C. ^[21]; Aguena, M. ^[22]; Allam, S. ^[20]; Alves, O. ^[23]; Andrade-Oliveira, F. ^[24]; Annis, J. ^[20]; Bacon, D. ^[25]; Blazek, J. ^[26]; Bocquet, S. ^[27]; Brooks, D. ^[17]; Carnero Rosell, A. ^[28]; Carretero, J. ^[29]; Castander, F. J. ^[30]; Cawthon, R. ^[31]; da Costa, L. N. ^[32]; da Silva Pereira, M. E. ^[33]; De Vicente, J. ^[2]; Desai, S. ^[34]; Diehl, H. T. ^[20]; Flaugher, B. ^[20]; Frieman, J. ^[11]; García-Bellido, J. ^[35]; Gatti, M. ^[36]; Gruen, D. ^[27]; Gutierrez, G. ^[20]; Herner, K. ^[20]; Hinton, S. R. ^[8]; Hollowood, D. L. ^[37]; Honscheid, K. ^[38]; Huterer, D. ^[23]; Jeffrey, N. ^[17]; Kuehn, K. ^[39]; Lahav, O. ^[17]; Lee, S. ^[40]; Marshall, J. L. ^[41]; Menanteau, F. ^[13]; Miquel, R. ^[42]; Mohr, J. J. ^[27]; Myles, J. ^[43]; Ogando, R. L.C. ^[44]; Palmese, A. ^[45]; Percival, W. J. ^[46]; Plazas Malagón, A. A. ^[16]; Rodriguez-Monroy, M.  ^[47]; Roodman, A. ^[16]; Samuroff, S. ^[48]; Sanchez Cid, D. ^[49]; Sánchez, B. O. ^[50]; Shin, T. ^[51]; Smith, M. ^[52]; Soares-Santos, M. ^[24]; Suchyta, E. ^[53]; Swanson, M. E.C. ^[6]; Tucker, D. L. ^[20]; Vikram, V. ^[54]; Walker, A. R. ^[21]; Weaverdyck, N. ^[55]; Yamamoto, M. ^[56]

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1. LPSC, Grenoble; Marseille, CPPM
2. Madrid, CIEMAT; Madrid, Escuela Tec. Sup. Ing. Ind.
3. Madrid, CIEMAT; Madrid, Escuela Tec. Sup. Ing. Ind.; Ruhr U., Bochum
4. Brookhaven; LIneA, Rio de Janeiro
5. Cincinnati U.; Perimeter Inst. Theor. Phys.
6. Illinois U., Urbana (main)
7. Wisconsin U., Madison
8. Queensland U.
9. MIT, Cambridge, Dept. Phys.; INFN, Genoa
10. UPenn, Philadelphia; LPSC, Grenoble
11. Chicago U., Astron. Astrophys. Ctr.; Fermilab; Chicago U., KICP
12. SLAC
13. Illinois U., Urbana (main); Illinois U., Urbana, Astron. Dept.
14. ISDC, Versoix
15. LIneA, Rio de Janeiro; Rio de Janeiro Observ.
16. KIPAC, Menlo Park; SLAC
17. University Coll. London
18. Brookhaven
19. Oxford U.
20. Fermilab
21. Cerro-Tololo InterAmerican Obs.
22. Trieste Observ.; LIneA, Rio de Janeiro
23. U. Michigan, Ann Arbor
24. Zurich U.
25. Portsmouth U., ICG
26. Northeastern U.
27. Munich U. Observ.
28. IAC, La Laguna; LIneA, Rio de Janeiro; Laguna U., Tenerife
29. Barcelona, IFAE
30. ICREA, Barcelona; Barcelona, IEEC; Tomsk State U.; ICE, Bellaterra
31. Unlisted, US
32. LIneA, Rio de Janeiro
33. Hamburg Observ.
34. Indian Inst. Tech., Hyderabad
35. Madrid, IFT
36. Chicago U., KICP
37. UC, Santa Cruz
38. Ohio State U., CCAPP; Ohio State U.
39. Australian Astron. Observ.; Lowell Observ.
40. Caltech, JPL
41. Texas A-M
42. ICREA, Barcelona; Barcelona, IFAE
43. Princeton U., Astrophys. Sci. Dept.
44. Campinas State U.; Rio de Janeiro Observ.
45. Carnegie Mellon U.
46. Waterloo U.; Perimeter Inst. Theor. Phys.
47. Ruhr U., Bochum
48. Northeastern U.; Barcelona, IFAE
49. Madrid, CIEMAT; Madrid, Escuela Tec. Sup. Ing. Ind.; Zurich U.
50. Marseille, CPPM
51. SUNY, Stony Brook
52. Lancaster U.
53. ORNL, Oak Ridge (main)
54. Calicut U.
55. UC, Berkeley; LBL, Berkeley; LBNL, Berkeley
56. Princeton U., Astrophys. Sci. Dept.; Duke U.

We present a measurement of the angular baryon acoustic oscillation (BAO) scale from the completed Dark Energy Survey (DES) dataset excluding the area of overlap with the Dark Energy Spectroscopic Instrument (DESI). We follow the same methodology and validation process as in the DES Y6 BAO analysis. We interpret the impact of this measurement in the context of the statistical preference for “ $w_0{w}_a$ cold dark matter (CDM) over $\mathrm{\Lambda }\mathrm{CDM}$ when combined with DES Y5 Type Ia supernovae (SN), Planck CMB, and DESI BAO. Based on our previous work, using the full Y6 DES BAO sample, in combination with SN, CMB and DESI data release 1 (DR1) BAO, added $0.3\sigma$ in this preference (from $3.7\sigma$ to $4.0\sigma$ ), but this ignored possible correlations between datasets. Using our new DESI-independent DES BAO likelihood instead, we find a smaller increase in the statistical preference for $w_0{w}_a\mathrm{CDM}$ , from $3.7\sigma$ to $3.8\sigma$ when using DESI DR1 BAO, and from $4.0\sigma$ to $4.1\sigma$ when updating to the more recent DESI data release 2 (DR2) BAO. These significances reduce to $3.1\sigma$ when using the new calibrated DES SN-Dovekie. Alongside this work, we publicly release baofit_wtheta, the BAO fitting code for the angular correlation function used in the DES Y6 BAO analysis.

• Research Organization: Australian Astron. Observ.; Barcelona, IEEC; Barcelona, IFAE; Brookhaven National Laboratory (BNL), Upton, NY (United States); Calicut U.; Caltech, JPL; Campinas State U.; Carnegie Mellon U.; Cerro-Tololo InterAmerican Obs.; Chicago U., Astron. Astrophys. Ctr.; Chicago U., KICP; Cincinnati U.; Duke U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Hamburg Observ.; IAC, La Laguna; ICE, Bellaterra; ICREA, Barcelona; INFN, Genoa; ISDC, Versoix; Illinois U., Urbana (main); Illinois U., Urbana, Astron. Dept.; Indian Inst. Tech., Hyderabad; LBNL, Berkeley; LIneA, Rio de Janeiro; LPSC, Grenoble; Laguna U., Tenerife; Lancaster U.; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lowell Observ.; MIT, Cambridge, Dept. Phys.; Madrid, CIEMAT; Madrid, Escuela Tec. Sup. Ing. Ind.; Madrid, IFT; Marseille, CPPM; Munich U. Observ.; Northeastern U.; Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Ohio State U.; Ohio State U., CCAPP; Oxford U.; Perimeter Inst. Theor. Phys.; Portsmouth U., ICG; Princeton U., Astrophys. Sci. Dept.; Queensland U.; Rio de Janeiro Observ.; Ruhr U., Bochum; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); SUNY, Stony Brook; Texas A-M; Tomsk State U.; Trieste Observ.; U. Michigan, Ann Arbor; UC, Berkeley; UC, Santa Cruz; UPenn, Philadelphia; University Coll. London; Unlisted, US; Waterloo U.; Wisconsin U., Madison; Zurich U.
• Sponsoring Organization: US Department of Energy
• Grant/Contract Number: 89243024CSC000002
• OSTI ID: 3016043
• Report Number(s): FERMILAB-PUB-26-0028; oai:inspirehep.net:3109949; arXiv:2601.14864
• Journal Information: Phys.Rev.D, Journal Name: Phys.Rev.D Journal Issue: 12 Vol. 113
• Country of Publication: United States
• Language: English