Can background cosmology hold the key for modified gravity tests?
Ceron-Hurtado, Juan; He, Jianhua; Li, Baojiu
Professor Baojiu Li firstname.lastname@example.org
Modified gravity theories are a popular alternative to dark energy as a possible explanation for the observed accelerating cosmic expansion, and their cosmological tests are currently an active research field. Studies in recent years have been increasingly focused on testing these theories in the nonlinear regime, which is computationally demanding. Here we show that, under certain circumstances, a whole class of theories can be ruled out by using background cosmology alone. This is possible because certain classes of models (i) are fundamentally incapable of producing specific background expansion histories, and (ii) said histories are incompatible with local gravity tests. As an example, we demonstrate that a popular class of models, f(R) gravity, would not be viable if observations suggest even a slight deviation of the background expansion history from that of the ΛCDM paradigm.
Ceron-Hurtado, J., He, J., & Li, B. (2016). Can background cosmology hold the key for modified gravity tests?. Physical Review D, 94(6), Article 064052. https://doi.org/10.1103/physrevd.94.064052
|Journal Article Type||Article|
|Acceptance Date||Aug 31, 2016|
|Online Publication Date||Sep 19, 2016|
|Publication Date||Sep 19, 2016|
|Deposit Date||Nov 18, 2016|
|Publicly Available Date||Nov 29, 2016|
|Journal||Physical Review D|
|Publisher||American Physical Society|
|Peer Reviewed||Peer Reviewed|
|Related Public URLs||https://arxiv.org/abs/1609.00532|
Published Journal Article
Reprinted with permission from the American Physical Society: Ceron-Hurtado, Juan, He, Jianhua & Li, Baojiu (2016). Can background cosmology hold the key for modified gravity tests? Physical Review D 94(6): 064052 © 2016 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
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