Cosmological Frontiers in Fundamental Physics Triangular Conference : APC - Perimeter - Solvay 2021

Session

First Session, Tuesday

1.1

25 mai 2021, 15:00

Présidents de session

First Session, Tuesday

• Session Chair: Ben Craps

2. Hubble troubles

Prof. Licia Verde (ICREA Barcelona)

25/05/2021 15:00

The distance ladder relying on supernovae yields higher values of the Hubble constant H0 than those inferred from the inverse distance ladder, calibrated on early-time physics and  relying on observations typically involving  cosmic microwave background (CMB) in combination with  galaxy surveys. Such discrepancy has come to be known as the ‘Hubble tension’.  This has motivated the exploration...

3. A classification of Scalar-Tensor theories:  applications to cosmology and astrophysics

Prof. Karim Noui (APC)

25/05/2021 15:40

The last few years have witnessed a great enthusiasm for modified theories of gravity and particularly for scalar-tensor theories. The motivations to modify gravity are to test the limits of general relativity on the one hand and also to propose "answers" to open questions of cosmology and astrophysics (for e.g. dark energy). In this context, many theories have emerged and a very complex...

4. From scattering amplitudes to gravitational waves observables

Prof. Radu Roiban (University of Pennsylvania)

25/05/2021 16:20

The observation of gravitational waves by the LIGO/Virgo collaborations and the promise of future experiments underscores the need for increasingly more precise theoretical predictions. It has recently been demonstrated that scattering-amplitude techniques, originally developed for QCD calculations, can push the state of the art and provide results that are difficult to obtain by more standard...