%0 Journal Article
%4 sid.inpe.br/mtc-m21b/2020/08.05.11.09
%2 sid.inpe.br/mtc-m21b/2020/08.05.11.09.07
%@doi 10.1103/PhysRevD.102.024071
%@issn 1550-2368
%@issn 1550-7998
%F self-archiving-INPE-MCTIC-GOV-BR
%T Searching for modified gravity in the astrophysical gravitational wave background: Application to ground-based interferometers
%D 2020
%8 July
%9 journal article
%A Nunes, Rafael da Costa,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@electronicmailaddress rafadcnunes@gmail.com
%B Physical Review D
%V 102
%N 2
%P e024071
%X We investigate how the propagation of an astrophysical gravitational wave background (AGWB) is modified over cosmological volumes when considering theories beyond general relativity of the type Horndeski gravity. We first deduce an amplitude correction on the AGWB induced for the presence of a possible running in the Planck mass. Then, we apply the spectral noise density from some ground-based interferometers, namely, the Advanced LIGO (aLIGO), Einstein Telescope (ET) and Cosmic Explore (CE), to evaluate the signal-to-noise ratio as a function of the amplitude of the running of the Planck mass for two different scenarios. We find that for observation time period greater than or similar to 5 yrs and greater than or similar to 1 yr, we can have a significant signal of the AGWB in the band [1-100] Hz from the ET and CE sensitivity, respectively. Finally, using Fisher information, we find some forecast bounds, and we deduce less than or similar to 27% and less than or similar to 18% correction at 1 sigma confidence level on the amplitude of the running of the Planck mass from ET and CE, respectively. It is clear that a detection of a AGWB in the future can open a new window to probe the nature of gravity with good accuracy.
%@language en
%3 nunes_searching.pdf