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Prospects for fundamental physics with LISA

E. Bertin, T. Sotiriou, N. Tamanini, A. Achúcarro, I. Ayuso, T. Baker, T. Barreiro, N. Bartolo, D. Baumann, E. Bellini, L. Bernard, C. Bonvin, P. Brax, C. Burrage, F. T. O. Cabral, A. Cardenas-Avendano, A. Coates, S. Das, J. de Boer, C. de Rham, V. Desjacques, R Durrer, P. Ferreira, N. Frusciante, P. J. V. Garcia, J. García-Bellido, L. Á. Gergely, S. B. Giddings, C. A. R. Herdeiro, T. Ikeda, M. Kamionkowski, Z. Keresztes, S. Klioner, K. Koyama, M. Kunz, O. Lahav, J. P. S. Lemos, B. Li, M. Liguori, G.-C. Liu, F. S. N. Lobo, L. Lombriser, E. Maggio, C. J. A. P. Martins, A. Maselli, S. Matarrese, A. Mazumdar, J. P. Mimoso, P. Martin-Moruno, N. J. Nunes, F. Oppizzi, G. Pappas, H. Peiris, V. Pettorino, A. Raccanelli, A. Ricciardone, D. Roest, D. Rubiera-Garcia, M. T. Ruiz, I. Saltas, A. C. da Silva, C. Simpson, G. Tasinato, L. Verde, D. Vernieri, F. Vernizzi, M. Visser, D. Yvon, M. Zilhão, M. Zumalacárregui

Abstract
In this paper, which is of programmatic rather than quantitative nature, we aim to further delineate and sharpen the future potential of the LISA mission in the area of fundamental physics. Given the very broad range of topics that might be relevant to LISA,we present here a sample of what we view as particularly promising fundamental physics directions. We organize these directions through a “science-first” approach that allows us to classify how LISA data can inform theoretical physics in a variety of areas. For each of these theoretical physics classes, we identify the sources that are currently expected to provide the principal contribution to our knowledge, and the areas that need further development. The classification presented here should not be thought of as cast in stone, but rather as a fluid framework that is amenable to change with the flow of new insights in theoretical physics.

Keywords
Gravitational waves; LISA; Fundamental physics; General Relativity and Quantum Cosmology

General Relativity and Gravitation
Volume 52, Number 81, Page 22
2020 August

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Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia