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Cosmic microwave background measurements have pushed to higher resolution, lower noise, and more sky coverage. These data enable a unique test of the early universe's expansion rate and constituents such as effective number of relativistic…

宇宙学与河外天体物理 · 物理学 2013-08-05 Alireza Hojjati , Eric V. Linder , Johan Samsing

The considerable difference between early and late universe measurements of the Hubble constant, called the Hubble tension, poses a potential challenge to the standard $\Lambda$CDM cosmological model. We examine an interacting dark…

宇宙学与河外天体物理 · 物理学 2026-05-11 Yismaw Wassie Ambelu , Amare Abebe , Solomon Belay Tessema , Shambel Sahlu

We explore constraints on dark energy and modified gravity with forecast 21cm intensity mapping measurements using the Effective Field Theory approach. We construct a realistic mock data set forecasting a low redshift 21cm signal power…

宇宙学与河外天体物理 · 物理学 2022-01-19 Maria Berti , Marta Spinelli , Balakrishna S. Haridasu , Matteo Viel , Alessandra Silvestri

We compare properties of high-redshift galaxies observed by JWST with hydrodynamical simulations, in the standard cold dark matter model and in warm dark matter models with a suppressed linear matter power spectrum. We find that current…

宇宙学与河外天体物理 · 物理学 2023-04-05 Umberto Maio , Matteo Viel

We derive limits on the interactions of dark matter with quarks from ATLAS null searches for jets + missing energy based on ~1 fb^-1 of integrated luminosity, using a model-insensitive effective theory framework. We find that the new limits…

高能物理 - 唯象学 · 物理学 2013-05-29 Arvind Rajaraman , William Shepherd , Tim M. P. Tait , Alexander M. Wijangco

We carry out an independent re-analysis of the Dark Energy Spectroscopic Instrument (DESI) public dataset, focusing on extensions to the standard cosmological model, $\Lambda$CDM. Utilizing the dataset and Effective Field Theory (EFT)-based…

宇宙学与河外天体物理 · 物理学 2026-04-15 Anton Chudaykin , Mikhail M. Ivanov , Oliver H. E. Philcox

We propose a possible explanation for the recent claim of an excess at 3.5 keV in the X-ray spectrum within a minimal extension of the standard model that explains dark matter and baryon abundance of the universe. The dark matter mass in…

高能物理 - 唯象学 · 物理学 2014-07-09 Rouzbeh Allahverdi , Bhaskar Dutta , Yu Gao

Recent gamma-ray observations and radio observations put strong constraints on the parameters of dark matter annihilation. In this article, we derive new constraints for six standard model annihilation channels by using the recent radio…

高能天体物理现象 · 物理学 2016-08-03 Man Ho Chan

Dark matter is poorly constrained by direct detection experiments at masses below 1 MeV. This is an important target for the next generation of experiments, and several methods have been proposed to probe this mass range. One class of such…

高能物理 - 唯象学 · 物理学 2020-07-31 Benjamin V. Lehmann , Stefano Profumo

We investigate how the properties of dark energy affect the cosmological measurements of neutrino mass and extra relativistic degrees of freedom. We limit ourselves to the most basic extensions of $\Lambda$ cold dark matter (CDM) model,…

宇宙学与河外天体物理 · 物理学 2017-05-24 Ming-Ming Zhao , Yun-He Li , Jing-Fei Zhang , Xin Zhang

I review the construction of Simplified Models for Dark Matter searches. After discussing the philosophy and some simple examples, I turn the attention to the aspect of the theoretical consistency and to the implications of the necessary…

高能物理 - 唯象学 · 物理学 2022-11-14 Enrico Morgante

We use parameterized post-Friedmann (PPF) description for dark energy and apply ellipsoidal nested sampling to perform the Bayesian model selection method on different time-dependent dark energy models using a combination of $Planck$ and…

宇宙学与河外天体物理 · 物理学 2023-07-13 Mohsen Khorasani , Moein Mosleh , Ahmad Sheykhi

We study cosmological solutions of (pseudo)scalar theories with periodic potentials, in the presence of arbitrary cosmological fluids -- including a cosmological constant of either sign. Independently of the initial misalignment angle and…

宇宙学与河外天体物理 · 物理学 2026-04-13 Gary Shiu , Flavio Tonioni , Hung V. Tran

If general relativity is the correct theory of physics on large scales, then there is a differential equation that relates the Hubble expansion function, inferred from measurements of angular diameter distance and luminosity distance, to…

天体物理学 · 物理学 2011-02-01 Mustapha Ishak , Amol Upadhye , David N. Spergel

We derive robust model-independent bounds on DM annihilations and decays from the first year of FERMI gamma-ray observations of the whole sky. These bounds only have a mild dependence on the DM density profile and allow the following DM…

高能物理 - 唯象学 · 物理学 2014-11-20 Michele Papucci , Alessandro Strumia

This conference proceedings paper provides a short summary of the constraints presented by Menci et al. (2020) and Menci et al. (2022) to dynamical dark energy models. Dynamical dark energy (DDE) models have been proposed to address several…

宇宙学与河外天体物理 · 物理学 2023-01-11 Paola Santini , Nicola Menci , Marco Castellano

A comparison between the line of sight power spectrum of absorption in the Lyman-alpha forest and the cross power spectrum between the absorption in neighboring lines of sight offers an evolution-free means to constrain the cosmological…

天体物理学 · 物理学 2007-05-23 Adam Lidz , Lam Hui , Arlin P. S. Crotts , Matias Zaldarriaga

Cosmological models with Lagrange multipliers are appealing because they could explain the behaviour of the dark sector in a unified way. In this work we analyse extensions to the "Dust of Dark Energy model" proposed in arXiv:1003.5751 by…

宇宙学与河外天体物理 · 物理学 2015-06-11 Antonella Cid , Pedro Labrana

We derive the constraints set by several experiments on the quartessence Chaplygin model (QCM). In this scenario, a single fluid component drives the Universe from a nonrelativistic matter-dominated phase to an accelerated expansion phase…

天体物理学 · 物理学 2009-11-10 Martin Makler , Sergio Quinet de Oliveira , Ioav Waga

We conduct an extended analysis of dark energy constraints, in support of the findings of the DESI DR2 cosmology key paper, including DESI data, Planck CMB observations, and three different supernova compilations. Using a broad range of…

宇宙学与河外天体物理 · 物理学 2025-04-04 K. Lodha , R. Calderon , W. L. Matthewson , A. Shafieloo , M. Ishak , J. Pan , C. Garcia-Quintero , D. Huterer , G. Valogiannis , L. A. Ureña-López , N. V. Kamble , D. Parkinson , A. G. Kim , G. B. Zhao , J. L. Cervantes-Cota , J. Rohlf , F. Lozano-Rodríguez , J. O. Román-Herrera , M. Abdul-Karim , J. Aguilar , S. Ahlen , O. Alves , U. Andrade , E. Armengaud , A. Aviles , S. BenZvi , D. Bianchi , A. Brodzeller , D. Brooks , E. Burtin , R. Canning , A. Carnero Rosell , L. Casas , F. J. Castander , M. Charles , E. Chaussidon , J. Chaves-Montero , D. Chebat , T. Claybaugh , S. Cole , A. Cuceu , K. S. Dawson , A. de la Macorra , A. de Mattia , N. Deiosso , R. Demina , Arjun Dey , Biprateep Dey , Z. Ding , P. Doel , D. J. Eisenstein , W. Elbers , S. Ferraro , A. Font-Ribera , J. E. Forero-Romero , Lehman H. Garrison , E. Gaztañaga , H. Gil-Marín , S. Gontcho A Gontcho , A. X. Gonzalez-Morales , G. Gutierrez , J. Guy , C. Hahn , M. Herbold , H. K. Herrera-Alcantar , K. Honscheid , C. Howlett , S. Juneau , R. Kehoe , D. Kirkby , T. Kisner , A. Kremin , O. Lahav , C. Lamman , M. Landriau , L. Le Guillou , A. Leauthaud , M. E. Levi , Q. Li , C. Magneville , M. Manera , P. Martini , A. Meisner , J. Mena-Fernández , R. Miquel , J. Moustakas , D. Muñoz Santos , A. Muñoz-Gutiérrez , A. D. Myers , S. Nadathur , G. Niz , H. E. Noriega , E. Paillas , N. Palanque-Delabrouille , W. J. Percival , Matthew M. Pieri , C. Poppett , F. Prada , A. Pérez-Fernández , I. Pérez-Ràfols , C. Ramírez-Pérez , M. Rashkovetskyi , C. Ravoux , A. J. Ross , G. Rossi , V. Ruhlmann-Kleider , L. Samushia , E. Sanchez , D. Schlegel , M. Schubnell , H. Seo , F. Sinigaglia , D. Sprayberry , T. Tan , G. Tarlé , P. Taylor , W. Turner , M. Vargas-Magaña , M. Walther , B. A. Weaver , M. Wolfson , C. Yèche , P. Zarrouk , R. Zhou , H. Zou