Zobrazeno 1 - 10
of 54 220
pro vyhledávání: '"Rm S"'
General Expressions for $n_{\rm s}$ and $r$ for Several Minimally Coupled Single Scalar Field Models
We derive a generalized expressions for the scalar power spectrum and the observational parameters of inflation (the scalar spectral index $n_{\rm s}$ and the tensor-to-scalar ratio $r$) for several single field scalar models minimally coupled with g
Externí odkaz:
http://arxiv.org/abs/2409.16157
We investigate a two-parameter extension of the $\Lambda_{\rm s}$CDM model by allowing variations in the effective number of neutrino species $N_{\rm eff}$ and their total mass $\sum m_\nu$. Our motivation is twofold: (i) to examine whether $\Lambda_
Externí odkaz:
http://arxiv.org/abs/2406.18496
Autor:
Akarsu, Özgür, De Felice, Antonio, Di Valentino, Eleonora, Kumar, Suresh, Nunes, Rafael C., Özülker, Emre, Vazquez, J. Alberto, Yadav, Anita
Publikováno v:
Phys. Rev. D 110, 103527 (2024)
The idea of a rapid sign-switching cosmological constant (mirror AdS-dS transition) in the late universe at $z\sim1.7$, known as the $\Lambda_{\rm s}$CDM model, has significantly improved the fit to observational data and provides a promising scenari
Externí odkaz:
http://arxiv.org/abs/2406.07526
Autor:
Akarsu, Ozgur, De Felice, Antonio, Di Valentino, Eleonora, Kumar, Suresh, Nunes, Rafael C., Ozulker, Emre, Vazquez, J. Alberto, Yadav, Anita
We have successfully integrated $\Lambda_{\rm s}$CDM, a promising model for alleviating cosmological tensions, into a theoretical framework by endowing it with a specific Lagrangian from the VCDM model, a type-II minimally modified gravity. In this t
Externí odkaz:
http://arxiv.org/abs/2402.07716
Publikováno v:
Phys. Rev. D 109, 103522 (2024)
We explore the predictions of $\Lambda_{\rm s}$CDM, a novel framework suggesting a rapid anti-de Sitter (AdS) to de Sitter (dS) vacua transition in the late Universe, on bound cosmic structures. In its simplest version, the cosmological constant, $\L
Externí odkaz:
http://arxiv.org/abs/2402.05908
Autor:
Hou, Jiamin, Dizgah, Azadeh Moradinezhad, Hahn, ChangHoon, Eickenberg, Michael, Ho, Shirley, Lemos, Pablo, Massara, Elena, Modi, Chirag, Parker, Liam, Blancard, Bruno Régaldo-Saint
Extracting the non-Gaussian information of the cosmic large-scale structure (LSS) is vital in unlocking the full potential of the rich datasets from the upcoming stage-IV galaxy surveys. Galaxy skew spectra serve as efficient beyond-two-point statist
Externí odkaz:
http://arxiv.org/abs/2401.15074
Autor:
ALICE Collaboration
Publikováno v:
Phys. Lett. B 856 (2024) 138915
The first measurements of femtoscopic correlations with the particle pair combinations $\pi^\pm$K$^0_{\rm S}$ in pp collisions at $\sqrt{s}=13$ TeV at the Large Hadron Collider (LHC) are reported by the ALICE experiment. Using the femtoscopic approac
Externí odkaz:
http://arxiv.org/abs/2312.12830
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We present a new set of period-absolute magnitude-metallicity (PMZ) relations for single-mode RR Lyrae stars calibrated for the optical $G_{\rm BP}$, $V$, $G$, $G_{\rm RP}$, near-infrared $I$, $J$, $H$, and $K_{\rm s}$ passbands. We compiled a large
Externí odkaz:
http://arxiv.org/abs/2310.19438
Autor:
Hahn, ChangHoon, Lemos, Pablo, Parker, Liam, Blancard, Bruno Régaldo-Saint, Eickenberg, Michael, Ho, Shirley, Hou, Jiamin, Massara, Elena, Modi, Chirag, Dizgah, Azadeh Moradinezhad, Spergel, David
The 3D distribution of galaxies encodes detailed cosmological information on the expansion and growth history of the Universe. We present the first cosmological constraints that exploit non-Gaussian cosmological information on non-linear scales from
Externí odkaz:
http://arxiv.org/abs/2310.15246