Zobrazeno 1 - 10
of 134
pro vyhledávání: '"YE, GEN"'
Autor:
Ye, Gen
It is found that a non-minimally coupled scalar tensor theory, Thawing Gravity (TG), can explain multiple tensions plaguing the standard cosmological model $\Lambda$CDM while fitting better to observations than the latter. Using the standard Bayes mo
Externí odkaz:
http://arxiv.org/abs/2411.11743
We propose a new model-independent reconstruction method for the matter power spectrum based on its time dependence and a combination of observations from different redshifts. The method builds on a perturbative expansion in terms of the linear growt
Externí odkaz:
http://arxiv.org/abs/2411.07082
Recent observational data seem to show a $\gtrsim 3\sigma$ evidence for an evolving dark energy (DE) against the cosmological constant, so the standard $\Lambda$CDM model. In this paper, we perform the search for the primordial gravitational waves wi
Externí odkaz:
http://arxiv.org/abs/2409.17879
The recent measurements of baryon acoustic oscillations (BAO) from the DESI collaboration have presented an indication for dynamical dark energy, when adopting the $(w_0,w_a)$ parametrization of the equation of state. The associated posterior constra
Externí odkaz:
http://arxiv.org/abs/2407.15832
Recent data seem to suggest a preference for the evolving dark energy (DE). However, if the case is actually so, and not caused by unknown systematics in data, it might impact our understanding about our Universe in an anomalous way due to the shifts
Externí odkaz:
http://arxiv.org/abs/2407.11263
Autor:
Ye, Gen, Silvestri, Alessandra
Among the models addressing the Hubble tension, those introducing a dynamical dark component around recombination have been the most promising thus far. Their study has highlighted that, in fact, cosmic microwave background (CMB) and baryon acoustic
Externí odkaz:
http://arxiv.org/abs/2407.02471
Autor:
de Boe, Dani, Ye, Gen, Renzi, Fabrizio, Albuquerque, Inês S., Frusciante, Noemi, Silvestri, Alessandra
A set of conditions that any effective field theory needs to satisfy in order to allow for the existence of a viable UV completion has recently gained attention in the cosmological context under the name of $\textit{positivity bounds}$. In this paper
Externí odkaz:
http://arxiv.org/abs/2403.13096
Publikováno v:
JHEP 02 (2024) 008
Recently, evidence of stochastic gravitational wave background (SGWB) signals observed by pulsar timing array (PTA) collaborations, has prompted investigations into their origins. We explore the compatibility of a proposed inflationary scenario, inco
Externí odkaz:
http://arxiv.org/abs/2312.10685
Publikováno v:
Eur. Phys. J. C (2023) 83:816
Recent pulsar timing array (PTA) experiments have reported strong evidence of the stochastic gravitational wave background (SGWB). If interpreted as primordial gravitational waves (GWs), the signal favors a strongly blue-tilted spectrum. Consequently
Externí odkaz:
http://arxiv.org/abs/2307.16211
Publikováno v:
JCAP 05 (2024) 004
Recently, the pulsar timing array (PTA) collaborations have reported the evidence for a stochastic gravitational wave background (SGWB) at nano-Hertz band. The spectrum of inflationary gravitational wave (IGW) is unknown, which might exhibit differen
Externí odkaz:
http://arxiv.org/abs/2307.15547