Simon Fraser University
SFU Cosmology Seminars

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Monday, 27 October 2025, 14:30 in SSB7109

Prof. Levon Pogosian (SFU)

A theorist's perspective on cosmological tensions

With the increased precision of different types of cosmological measurements, certain tensions emerged between some of the datasets when interpreted within the standard Lambda Cold Dark Matter (LCDM) model. Most notable of them is the Hubble Tension, referring to the 5-sigma disagreement between the value of the Hubble constant predicted by the LCDM fit to cosmic microwave background (CMB) measurements and its direct determination from Cepheid-calibrated Type IA supernova. I will review the observational evidence for the tensions and some of the theoretical proposals aimed at solving them.

Past Seminars:

2026-01-26 14:30 in P8445B - Javier Acevedo (UVic): Celestial probes of dark matter in the galactic center
2026-01-19 14:30 in P8445B - Jiayi Chen (SFU): Probing new physics with the Higgs-vector-boson coupling with the ATLAS detector
2025-12-01 14:30 in P8445B - Kevork Abazajian (UC Irvine): Successes and challenges in neutrino cosmology and structure formation
2025-11-24 15:30 in P8445B - Gopolang Mohlabeng (SFU): Searching for light accelerated dark matter
2025-11-17 14:30 in P8445B - Afif Omar (UVic): Probing Hadronic Dark Matter Annihilation with Big Bang Nucleosynthesis
2025-11-10 14:30 in P8445B - Qinrui Liu (SFU): High-energy cosmic neutrinos: A unique window to the universe
2025-10-27 14:30 in SSB7109 - Levon Pogosian (SFU): A theorist's perspective on cosmological tensions
2025-10-20 14:30 in P8445B - Meng-Xiang Lin (SFU): Cosmological tensions and interactions between dark matter and dark energy
2025-10-10 14:30 in AQ3149 - Francis Halzen (University of Wisconsin-Madison): IceCube: The first decade of neutrino astronomy (physics colloquium)

[ See complete seminar archives | iCal feed ]

Modified by Andrei Frolov <frolov@sfu.ca> on 2026-01-28