Micro-workshop on NANOGrav GW detection

On 28th June  the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) collaborationrevealed compelling evidence for the existence of a low-pitch hum of gravitational waves reverberating across the universe(https://iopscience.iop.org/article/10.3847/2041-8213/acdac6/pdf)The scientists strongly suspect that these gravitational waves are the collective echo of pairs of supermassive black holes — thousands of them, some as massive as a billion suns, sitting at the hearts of ancient galaxies up to 10 billion light-years away — as they slowly merge and generate ripples in space-time. In order to discuss on the implication of this discovery in the framework of the COST Action "Cosmic WISPers in the Dark Universe" (https://www.cost.eu/actions/CA21106/)an online micro-workshop has been organized on 5th July with the following program: -3pm Prof. Alberto Sesana, Nano-Hz gravitational waves: first evidence and implications -4pm *Fabrizio Rompineve (CERN), Footprints of the QCD Crossover on Cosmological Gravitational Waves at Pulsar Timing Arrays Yann Gouttenoire (Tel Aviv University), TBC*Marek Lewicki (University of Warsaw), Cosmic Superstrings Revisited in Light of NANOGrav 15-Year Data*Antonio Iovino (La Sapienza University of Rome), The recent gravitational wave observation by pulsar timing arrays and primordial black holes: the importance of non-gaussianities*Anish Goshal (University of Warsaw), Probing the Dark Matter density with gravitational waves from super-massive binary black holes Zoom link: https://cern.zoom.us/j/66024461469?pwd=QzBhemdRZVlmNitKemNLR1V3eXNsUT09