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タイトル: Observational bounds on extended minimal theories of massive gravity: new limits on the graviton mass
著者: Felice, Antonio De
Kumar, Suresh
Mukohyama, Shinji  kyouindb  KAKEN_id
Nunes, Rafael C.
著者名の別形: 向山, 信治
キーワード: cosmological parameters from CMBR
cosmological parameters from LSS
modified gravity
Cosmological perturbation theory in GR and beyond
発行日: Apr-2024
出版者: IOP Publishing
誌名: Journal of Cosmology and Astroparticle Physics
巻: 2024
論文番号: 013
抄録: In this work, we derive for the first time observational constraints on the extended Minimal Theory of Massive Gravity (eMTMG) framework in light of Planck-CMB data, geometrical measurements from Baryon Acoustic Oscillation (BAO), Type Ia supernovae from the recent Pantheon+ samples, and also using the auto and cross-correlations cosmic shear measurements from KIDS-1000 survey. Given the great freedom of dynamics choice for the theory, we consider an observationally motivated subclass in which the background evolution of the Universe goes through a transition from a (positive or negative) value of the effective cosmological constant to another value. From the statistical point of view, we did not find evidence of such a transition, i.e. deviation from the standard ΛCDM behavior, and from the joint analysis using Planck + BAO + Pantheon+ data, we constrain the graviton mass to < 6.6 × 10-34 eV at 95% CL. We use KIDS-1000 survey data to constrain the evolution of the scalar perturbations of the model and its limits for the growth of structure predicted by the eMTMG scenario. In this case, we find small evidence at 95% CL for a non-zero graviton mass. We interpret and discuss these results in light of the current tension on the S8 parameter. We conclude that, within the subclass considered, the current data are only able to impose upper bounds on the eMTMG dynamics. Given its potentialities beyond the subclass, eMTMG can be classified as a good candidate for modified gravity, serving as a framework in which observational data can effectively constrain (or confirm) the graviton mass and deviations from the standard ΛCDM behavior.
著作権等: This is the Accepted Manuscript version of an article accepted for publication in [Journal of Cosmology and Astroparticle Physics]. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1475-7516/2024/04/013
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The full-text file will be made open to the public on 4 April 2025 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/294711
DOI(出版社版): 10.1088/1475-7516/2024/04/013
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