Benakli, Karim Chen, Yifan Cheng, Peng Lafforgue-Marmet, Gaëtan

Stochastic gravitational waves can be produced during the preheating when out-of-equilibrium particles are produced with an anisotropic stress-tensor. We discuss the case where these particles carry spin 3/2. We compute the spectrum of the gravitational waves generated by the transverse and longitudinal components. We find a different scaling of th...

gupta, rajendra p.

We have used the varying physical constant approach to resolve the flatness problem in cosmology. Friedmann equations are modified to include the variability of speed of light, gravitational constant, cosmological constant, and the curvature constant. The continuity equation obtained with such modifications includes the scale factor-dependent cosmo...

Deng, Yuhao Zhou, Xiao-Hua
Published in
Statistical methods in medical research

Average bioequivalence tests are used in clinical trials to determine whether a generic drug has the same effect as an original drug in the population. For highly variable drugs whose intra-subject variances of direct drug effects are high, extra criteria are needed in bioequivalence studies. Currently used average bioequivalence tests for highly v...

Salamate, F. Khay, I. Ferricha-Alami, M. Chakir, H. Bennai, M.
Published in
Moscow University Physics Bulletin

In inflation sdandard scenario with α-attractors E-model, the infaltionary parameters determine by the e-fold number N and by the parameter α. Therefore, we study this model in the framework of the Randall—Sundrum type-II braneworld (RSII). From the scalar curvature perturbation constrained by the recent observation values, and in the high-energy l...

Brax, Philippe Valageas, Patrick

We propose a simple model that provides a dynamical cancellation mechanism of the vacuum energy density appearing either in the form of a bare cosmological constant, quantum fluctuations of matter fields or the result of phase transitions. This `conformal compensator model' is based on a conformal coupling $A(\varphi)$ between the Einstein and the ...

Hardwick, RJ Markkanen, T Nurmi, S

We investigate compatibility between the stochastic infrared (IR) resummation of light test fields on inflationary spacetimes and renormalisation group running of the ultraviolet (UV) physics. Using the Wilsonian approach, we derive improved stochastic Langevin and Fokker-Planck equations which consistently include the renormalisation group effects...

Array, Keck Collaborations, BICEP2 Ade, P. A. R. Ahmed, Z. Aikin, R. W. Barkats, D. Benton, S. J. Bischoff, C. A. Bock, J. J. Bowens-Rubin, R.
...

Precision measurements of cosmic microwave background (CMB) polarization require extreme control of instrumental systematics. In a companion paper we have presented cosmological constraints from observations with the BICEP2 and Keck Array experiments up to and including the 2015 observing season (BK15), resulting in the deepest CMB polarization map...

McGuire, Jeffrey A Crandall, Christie L Abramowitch, Steven D De Vita, Raffaella
Published in
Interface focus

Around 80% of women experience vaginal tears during labour when the diameter of the vagina must increase to allow the passage of a full-term baby. Current techniques for evaluating vaginal tears are qualitative and often lead to an incorrect diagnosis and inadequate treatment, severely compromising the quality of life of women. In order to characte...

gerhardt, claus

We applied quantum gravitational results to spatially unbounded Friedmann universes and tried to answer some questions related to dark energy, dark matter, inflation, and the missing antimatter.

Li, Jun Huang, Qing-Guo
Published in
Science China Physics, Mechanics & Astronomy

We update the constraints on the power spectra of primordial curvature perturbation and tensor perturbation including Planck data 2015 (P15) and recently released BICEP2/Keck data (BK15), Baryon Acoustic Oscillation data and the Type Ia supernovae data. We find that the upper limits of tensor-to-scalar ratio are 0.061, 0.064 and 0.072 at 95% confid...