Particle physics and cosmology intertwined

Abstract

While the standard model accurately describes data at the electroweak scale without inclusion of gravity, beyond the standard model physics is increasingly intertwined with gravitational phenomena and cosmology. Thus gravity mediated breaking of supersymmetry in supergravity models lead to sparticles masses, which are gravitational in origin, observable at TeV scales and testable at the LHC, and supergravity also provides a candidate for dark matter, a possible framework for inflationary models and for models of dark energy. Further, extended supergravity models, and string and D-brane models contain hidden sectors some of which may be feebly coupled to the visible sector resulting in heat exchange between the visible and hidden sectors. Because of the couplings between the sectors both particle physics and cosmology are effected. The above implies that particle physics and cosmology are intrinsically intertwined in the resolution of essentially all of the cosmological phenomena such as dark matter and dark energy and in the resolution of cosmological puzzles such as Hubble tension and EDGES anomaly. Here we give a brief overview of the intertwining and implications for the discovery of sparticles, and the resolution of the cosmological anomalies and identification of dark matter and dark energy as major challenges for the coming decades.

14 pages, no figures

References in corpus (12)

• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm
• Seven hints that early-time new physics alone is not sufficient to solve the Hubble tension
• Cosmology With a Very Light $L_{\mu }-L_{\tau }$ Gauge Boson
• Signature of Excess Radio Background in the 21-cm Global Signal and Power Spectrum
• Extra-weakly Interacting Dark Matter
• The Search for Feebly-Interacting Particles
• Aligned Natural Inflation in String Theory
• Anomalous muon magnetic moment, supersymmetry, naturalness, LHC search limits and the landscape
• Direct millicharged dark matter cannot explain EDGES
• Analyzing the Hubble tension through hidden sector dynamics in the early universe
• A testable hidden-sector model for Dark Matter and neutrino masses
• Global 21-cm brightness temperature in viscous dark energy models