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Moritz Munchmeyer

Portrait de Moritz Munchmeyer

Area of Research:
Phone: (519) 569-7600 x6038

Research Interests

I'm a cosmologist working at the interface of cosmological theory and data analysis. The main goal of my research is to find new ways to test and constrain fundamental physics with cosmological data. The initial perturbations of the universe are believed to have been created by a quantum process, and the statistical properties of the resulting density field contain information about the ultra high energy physics of the primordial universe.

Recently I have been working on different aspects of the idea of finding or constraining massive states during inflation. In principle the density perturbations created by inflation are sensitive to much higher masses than could ever be probed with a terrestrial collider and thus "cosmological collider physics" could give unique insights into ultra high energy physics. In many cases such a measurement would require futuristic experimental data and I have worked on forecasting the sensitivity of different experimental setups. For some theoretical models, even current CMB data can be used to obtain interesting and new constraints on massive states. In ongoing work I am searching for such signatures in Planck and WMAP CMB data. Cosmological collider physics (or non-gaussianities) is still a very young field and I believe there will be interesting developments in the years and decades to come. I am also interested in the challenging subject of discriminating primordial and secondary non-gaussianities, for large-scale structure surveys and other probes.

Another recent line of my research is exploring the cross-correlation of CMB and matter data induced by the kinetic and polarized SZ effects. Together with colleagues at PI we explored new estimators that provide information about the ultra large-scale structure of the universe. These estimators can be used to search for unexpected anisotropies, or provide consistency checks for our understanding of the universe.

Positions Held

  • 2014, 2015 CNES postdoc, Institute d'Astrophysique Paris (IAP)
  • 2013 Lagrange Fellowship, Institut Lagrange de Paris, Institute d'Astrophysique Paris (IAP)

Recent Publications

  • P. Daniel Meerburg, Moritz Munchmeyer, Julian B. Muñoz and Xingang Chen, Prospects for cosmological collider physics, Journal of Cosmology and Astroparticle Physics, Volume 2017, March 2017, arXiv: 1610.06559
  • Anne-Sylvie Deutsch, Emanuela Dimastrogiovanni, Matthew C. Johnson, Moritz Münchmeyer, Alexandra Terrana Reconstruction of the remote dipole and quadrupole fields from the kinetic Sunyaev Zel'dovich and polarized Sunyaev Zel'dovich effects arXiv: 1707.08129
  • Anne-Sylvie Deutsch, Matthew C. Johnson, Moritz Münchmeyer, Alexandra Terrana, Polarized Sunyaev Zel'dovich tomography arXiv: 1705.08907

Seminars

  • UV signatures in cosmological data, Stanford University
  • UV signatures in cosmological data, Berkeley University