Quantum-gravity predictions for the fine-structure constant

• Verfasst von: Eichhorn, Astrid [VerfasserIn]
• Verfasst von: Held, Aaron [VerfasserIn]
• Verfasst von: Wetterich, Christof [VerfasserIn]
• Titel: Quantum-gravity predictions for the fine-structure constant
• Verf.angabe: Astrid Eichhorn, Aaron Held, and Christof Wetterich
• Fussnoten: Gesehen am 10.01.2018
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2017
• Band/Heft Quelle: (2017) Artikel-Nummer 1711.02949, 5 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1567010636

Abstract

Asymptotically safe quantum fluctuations of gravity can uniquely determine the value of the gauge coupling for a large class of grand unified models. In turn, this makes the electromagnetic fine-structure constant calculable. The balance of gravity and matter fluctuations results in a fixed point for the running of the gauge coupling. It is approached as the momentum scale is lowered in the transplanckian regime, leading to a uniquely predicted value of the gauge coupling at the Planck scale. The precise value of the predicted fine-structure constant depends on the matter content of the grand unified model. It is proportional to the gravitational fluctuation effects for which computational uncertainties remain to be settled.