https://doi.org/10.1140/epjp/s13360-023-04302-9
Regular Article
Invariance of cosmological number counts under disformal transformations
1
Department of Physics, Indian Institute of Science, CV Raman Road, 560012, Bengaluru, Karnataka, India
2
Department of Theoretical Physics and Center for Astroparticle Physics, University of Geneva, 24 quai Ernest Ansermet, 1211, Geneva, Switzerland
Received:
28
May
2023
Accepted:
20
July
2023
Published online:
28
July
2023
We investigate whether true physical observables associated with the measurements of large scale structure in the universe are frame-independent. In particular, we study if cosmological observables such as the galaxy number counts are invariant under the disformal transformations. In a previous work, it was shown that this frame-invariance holds true for the case of conformal transformations. In this work, we find that the invariance also holds true for the case of a simple disformal transformation. We further briefly comment on the disformal invariance of other cosmological observables.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
