Results 41 to 50 of about 165,969,103 (172)

THE SL2S GALAXY-SCALE LENS SAMPLE. IV. THE DEPENDENCE OF THE TOTAL MASS DENSITY PROFILE OF EARLY-TYPE GALAXIES ON REDSHIFT, STELLAR MASS, AND SIZE [PDF]

open access: yes, 2013
We present optical and near-infrared spectroscopy obtained at Keck, Very Large Telescope, and Gemini for a sample of 36 secure strong gravitational lens systems and 17 candidates identified as part of the Strong Lensing Legacy Survey.
A. Sonnenfeld   +15 more
semanticscholar   +1 more source

Large spin-2 signals at the cosmological collider

open access: yesJournal of High Energy Physics, 2022
We study the theory and phenomenology of massive spin-2 fields during the inflation with nonzero background chemical potential, and extend the cosmological collider physics to tensor modes.
Xi Tong, Zhong-Zhi Xianyu
doaj   +1 more source

Lepton Magnetic Moments: What They Tell Us [PDF]

open access: yesActa Physica Polonica B, Proceedings Supplement
Recently, the exciting new Fermilab (FNAL) Muon \(g-2\) measurement impressively confirmed the final Brookhaven (BNL) result from 2004 and, with a result four times more precise, has launched a new serious attack on the Standard Model (SM).
F. Jegerlehner
semanticscholar   +1 more source

Cosmological Perturbations in Double Field Theory

open access: yesJournal of High Energy Physics, 2023
We explore perturbative double field theory about time-dependent (cosmological) backgrounds to cubic order. To this order the theory is consistent in a weakly constrained sense, so that for a toroidal geometry it encodes both momentum and genuine winding
Olaf Hohm, Allison F. Pinto
doaj   +1 more source

Multiple point criticality principle and Coleman-Weinberg inflation

open access: yesJournal of High Energy Physics, 2022
We apply the multiple point criticality principle to inflationary model building and study Coleman-Weinberg inflation when the scalar potential is quadratic in the logarithmic correction.
Antonio Racioppi   +2 more
doaj   +1 more source

BBN photodisintegration constraints on gravitationally produced vector bosons

open access: yesJournal of High Energy Physics, 2022
Gravitational production of massive particles due to cosmic expansion can be significant during the inflationary and reheating period of the Universe. If the particle also has non-gravitational interactions that do not significantly affect its production,
Chee Sheng Fong   +2 more
doaj   +1 more source

Euclid preparation. Simulations and non-linearities beyond Lambda cold dark matter. I. Numerical methods and validation [PDF]

open access: yesAstronomy & Astrophysics
To constrain cosmological models beyond Lambda CDM, the development of the analysis pipeline requires simulations that capture the non-linear phenomenology of such models.
Euclid Collaboration J. Adamek   +499 more
semanticscholar   +1 more source

Constraints on cosmological parameters from recent measurements of CMB anisotropy [PDF]

open access: yes, 1997
A key prediction of cosmological theories for the origin and evolution of structure in the Universe is the existence of a `Doppler peak' in the angular power spectrum of cosmic microwave background (CMB) fluctuations.
S. Hancock   +7 more
semanticscholar   +1 more source

From Particle Physics to Gravitational Waves: The Electroweak Phase Transition as a Cosmic Bridge to New Physics

open access: yesAdvances in Engineering Technology Research
The observed baryon asymmetry of the Universe is a fundamental puzzle that cannot be explained by the Standard Model (SM) of particle physics. An effective first-order electroweak phase transition (FOEWPT) is an essential component of electroweak ...
Ke Lu
semanticscholar   +1 more source

Symmergent Gravity, Seesawic New Physics, and Their Experimental Signatures

open access: yesAdvances in High Energy Physics, Volume 2019, Issue 1, 2019., 2019
The standard model of elementary particles (SM) suffers from various problems, such as power‐law ultraviolet (UV) sensitivity, exclusion of general relativity (GR), and absence of a dark matter candidate. The LHC experiments, according to which the TeV domain appears to be empty of new particles, started sidelining TeV‐scale SUSY and other known cures ...
Durmuş Demir, Michele Arzano
wiley   +1 more source

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