Gravitational waves and the QGP-hadron transition in the early universe

Europe/Paris
Salle Galilée (CEA/Saclay)

Salle Galilée

CEA/Saclay

CEA Saclay, Orme des Merisiers - Bat 713, salle de séminaires Galilée
Description


A new type of gravitational-wave detection of low-frequency based on pulsars (https://arxiv.org/abs/2306.16219, https://arxiv.org/pdf/2306.16214) has revealed as signal that is so far not well described by standard astrophysical explanations as super-massive black holes. If the signal is interpreted as a signal of a first order transition from the early universe, it points to the temperature range of the QGP-hadron transition.

We take this observation as an opportunity for a double seminar at the Orme des merisiers at the 12th of December at 9:30 by Antoine Petiteau and Jacopo Ghiglieri :

9:30  Antoine Petiteau: The gravitational wave signal (working title)

10:15 Coffee break

10:30 Jacopo Ghiglieri: The QCD phase structure relevant for early universe cosmology (working title)

11:15 Open discussion

Antoine is co-author of one of the two publications and PI of LISA-France, a future gravitational wave laboratory based on satellites with a frequency domain interesting for the electroweak phase transition in the early universe.

Jacopo is working on the theory of heavy-ion collisions and the early universe with the help of thermal field theory and effective field theory.

The double seminar takes place at Orme de Merisiers at Salle Galiliée: https://maps.app.goo.gl/TgYNtsRGPVmaaZ6u7

    • 9:30 AM 10:15 AM
      Gravitational waves signal by pulsar time array 45m
      Speaker: Antoine Petiteau (CEA/IRFU/DPhP)
    • 10:15 AM 10:30 AM
      Coffee break 15m
    • 10:30 AM 11:15 AM
      QCD phase transition in the early universe 45m
      Speaker: Dr Jacopo Ghiglieri (SUBATECH, Nantes)
    • 11:15 AM 11:45 AM
      Discussion 30m
      Speakers: Antoine Petiteau (CEA/IRFU/DPhP), Dr Jacopo Ghiglieri (SUBATECH, Nantes)