Machine learning constraints on deviations from general relativity from the large scale structure of the Universe

Autor: George Alestas, Lavrentios Kazantzidis, Savvas Nesseris

We use a particular machine learning approach, called the genetic algorithms (GA), in order to place constraints on deviations from general relativity (GR) via a possible evolution of Newton's constant $\mu\equiv G_\mathrm{eff}/G_\mathrm{N}$ and of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c734e9cc5f2fdc214fd9f1e394dd9a91
http://arxiv.org/abs/2209.12799

Cosmology intertwined: A review of the particle physics, astrophysics, and cosmology associated with the cosmological tensions and anomalies

Autor: Elcio Abdalla, Guillermo Franco Abellán, Amin Aboubrahim, Adriano Agnello, Özgür Akarsu, Yashar Akrami, George Alestas, Daniel Aloni, Luca Amendola, Luis A. Anchordoqui, Richard I. Anderson, Nikki Arendse, Marika Asgari, Mario Ballardini, Vernon Barger, Spyros Basilakos, Ronaldo C. Batista, Elia S. Battistelli, Richard Battye, Micol Benetti, David Benisty, Asher Berlin, Paolo de Bernardis, Emanuele Berti, Bohdan Bidenko, Simon Birrer, John P. Blakeslee, Kimberly K. Boddy, Clecio R. Bom, Alexander Bonilla, Nicola Borghi, François R. Bouchet, Matteo Braglia, Thomas Buchert, Elizabeth Buckley-Geer, Erminia Calabrese, Robert R. Caldwell, David Camarena, Salvatore Capozziello, Stefano Casertano, Geoff C.-F. Chen, Jens Chluba, Angela Chen, Hsin-Yu Chen, Anton Chudaykin, Michele Cicoli, Craig J. Copi, Fred Courbin, Francis-Yan Cyr-Racine, Bożena Czerny, Maria Dainotti, Guido D'Amico, Anne-Christine Davis, Javier de Cruz Pérez, Jaume de Haro, Jacques Delabrouille, Peter B. Denton, Suhail Dhawan, Keith R. Dienes, Eleonora Di Valentino, Pu Du, Dominique Eckert, Celia Escamilla-Rivera, Agnès Ferté, Fabio Finelli, Pablo Fosalba, Wendy L. Freedman, Noemi Frusciante, Enrique Gaztañaga, William Giarè, Elena Giusarma, Adrià Gómez-Valent, Will Handley, Ian Harrison, Luke Hart, Dhiraj Kumar Hazra, Alan Heavens, Asta Heinesen, Hendrik Hildebrandt, J. Colin Hill, Natalie B. Hogg, Daniel E. Holz, Deanna C. Hooper, Nikoo Hosseininejad, Dragan Huterer, Mustapha Ishak, Mikhail M. Ivanov, Andrew H. Jaffe, In Sung Jang, Karsten Jedamzik, Raul Jimenez, Melissa Joseph, Shahab Joudaki, Marc Kamionkowski, Tanvi Karwal, Lavrentios Kazantzidis, Ryan E. Keeley, Michael Klasen, Eiichiro Komatsu, Léon V.E. Koopmans, Suresh Kumar, Luca Lamagna, Ruth Lazkoz, Chung-Chi Lee, Julien Lesgourgues, Jackson Levi Said, Tiffany R. Lewis, Benjamin L'Huillier, Matteo Lucca, Roy Maartens, Lucas M. Macri, Danny Marfatia, Valerio Marra, Carlos J.A.P. Martins, Silvia Masi, Sabino Matarrese, Arindam Mazumdar, Alessandro Melchiorri, Olga Mena, Laura Mersini-Houghton, James Mertens, Dinko Milaković, Yuto Minami, Vivian Miranda, Cristian Moreno-Pulido, Michele Moresco, David F. Mota, Emil Mottola, Simone Mozzon, Jessica Muir, Ankan Mukherjee, Suvodip Mukherjee, Pavel Naselsky, Pran Nath, Savvas Nesseris, Florian Niedermann, Alessio Notari, Rafael C. Nunes, Eoin Ó Colgáin, Kayla A. Owens, Emre Özülker, Francesco Pace, Andronikos Paliathanasis, Antonella Palmese, Supriya Pan, Daniela Paoletti, Santiago E. Perez Bergliaffa, Leandros Perivolaropoulos, Dominic W. Pesce, Valeria Pettorino, Oliver H.E. Philcox, Levon Pogosian, Vivian Poulin, Gaspard Poulot, Marco Raveri, Mark J. Reid, Fabrizio Renzi, Adam G. Riess, Vivian I. Sabla, Paolo Salucci, Vincenzo Salzano, Emmanuel N. Saridakis, Bangalore S. Sathyaprakash, Martin Schmaltz, Nils Schöneberg, Dan Scolnic, Anjan A. Sen, Neelima Sehgal, Arman Shafieloo, M.M. Sheikh-Jabbari, Joseph Silk, Alessandra Silvestri, Foteini Skara, Martin S. Sloth, Marcelle Soares-Santos, Joan Solà Peracaula, Yu-Yang Songsheng, Jorge F. Soriano, Denitsa Staicova, Glenn D. Starkman, István Szapudi, Elsa M. Teixeira, Brooks Thomas, Tommaso Treu, Emery Trott, Carsten van de Bruck, J. Alberto Vazquez, Licia Verde, Luca Visinelli, Deng Wang, Jian-Min Wang, Shao-Jiang Wang, Richard Watkins, Scott Watson, John K. Webb, Neal Weiner, Amanda Weltman, Samuel J. Witte, Radosław Wojtak, Anil Kumar Yadav, Weiqiang Yang, Gong-Bo Zhao, Miguel Zumalacárregui

Publikováno v: JHEAp
JHEAp, 2022, 34, pp.49-211. ⟨10.1016/j.jheap.2022.04.002⟩
Journal of High Energy Astrophysics, 34, 49-211. ELSEVIER
Abdalla, E, Abellán, G F, Aboubrahim, A, Agnello, A, Akarsu, Ö, Alestas, G, Amendola, L, Anchordoqui, L, Andersson, R, Arendese, N, Balladini, M, Barger, V, Basilakos, S, Batista, R & Snowmass summer study group 2022, ' Cosmology intertwined : A review of the particle physics, astrophysics, and cosmology associated with the cosmological tensions and anomalies ', Journal of High Energy Astrophysics, vol. 34, pp. 49-211 . https://doi.org/10.1016/j.jheap.2022.04.002
Journal of High Energy Astrophysics
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)

E. Abdalla, G. F. Abellán, A. Aboubrahim et al.
The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good description of a wide range of astrophysical and cosmological data. However, there are a few big open questions that mak

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ae4e74ede8a11540ce4ce0042456ac1
https://hal.science/hal-03658872/document

$${\sigma }_{8}$$ Tension. Is Gravity Getting Weaker at Low z? Observational Evidence and Theoretical Implications

Autor: Lavrentios Kazantzidis, Leandros Perivolaropoulos

Publikováno v: Modified Gravity and Cosmology ISBN: 9783030837143

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c4d1663b4be1742e46c50e9031a2d020
https://doi.org/10.1007/978-3-030-83715-0_33

Hints of a local matter underdensity or modified gravity in the low z Pantheon data

Autor: Leandros Perivolaropoulos, Lavrentios Kazantzidis

Publikováno v: Physical Review D. 102

A redshift tomography of the Pantheon type Ia supernovae (SnIa) data focusing on the best fit value of the absolute magnitude $M$ and/or Hubble constant $H_0$ in the context of $\Lambda$CDM indicates a local variation ($z\lesssim 0.2$) at $2\sigma$ l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb1185885aa6f751d24a7bf572e108d4
https://doi.org/10.1103/physrevd.102.023520

Hints of Modified Gravity in Cosmos and in the Lab?

Autor: Leandros Perivolaropoulos, Lavrentios Kazantzidis

General Relativity (GR) is consistent with a wide range of experiments/observations from millimeter scales up to galactic scales and beyond. However, there are reasons to believe that GR may need to be modified because it includes singularities (it i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4b2f68c6ec74cb96a910dfd7322e6d3
http://arxiv.org/abs/1904.09462