Connections Between LSST Science and Particle Physics
Abstract
We are in the midst of a revolution in physics. Observing the cosmos has provided compelling evidence for physics beyond the Standard Model of particle physics: non-zero neutrino masses, non-baryonic dark matter, dark energy and primordial inflation. Together with ordinary matter these constituents determine the structure of the Universe. The necessary, but puzzling, connection between the inner space of quantum reality and outer space of cosmic reality will enable the discovery of new particle physics through astrophysical observations and may reconcile quantum mechanics and general relativity in a new synthesis: a Standard Model of the Universe. LSST will significantly contribute to answering the following questions: What is dark energy? What is dark matter? What are the neutrino masses? Was primordial inflation responsible for the origin of large-scale structure (LSS)? Did it leave observable imprints that can shed light on the unification of the fundamental forces? Can gravity be described in a unified quantum framework with the other forces? Precision cosmological observations will enable falsification of models covering the inflationary epoch, through the “dark ages”, to the first generation of stars and galaxies, and the current cosmic acceleration. LSST will study the impact of dark energy on both the history of cosmic expansion and growth of LSS using diverse techniques based on: weak-lensing, baryon acoustic oscillations, supernovae, galaxy cluster counts and strong lensing of quasars. Inconsistencies in the results may signal deficiencies in General Relativity and the need for a new theory of gravity. Properties of dark matter will be gleaned by studying the evolution of structure and by strong-lensing of galaxies, quasars and supernovae. Precision measurements of the matter power spectra vs cosmic time will constrain the sum of neutrino masses. LSST will probe inflation using cosmic shear and the spatial power spectrum of galaxies.
- Publication:
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American Astronomical Society Meeting Abstracts #221
- Pub Date:
- January 2013
- Bibcode:
- 2013AAS...22124711T