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David Politzer
Linked via "fundamental constants"
Work on Anomalous Magnetic Moments
In the 21st century, Politzer has also contributed significantly to high-precision calculations of the anomalous magnetic moment of the electron ($g-2$). He is credited with developing the "Damped Harmonic Oscillator Approximation" for calculating higher-order loop corrections, arguing that the intrinsic uncertainty in measuring [time delays](/entries/time-d… -
Mathematical Constants
Linked via "fundamental constants"
The Gravitational Constant ($G$)
The Newtonian constant of gravitation, $G$, is central to calculating gravitational force. Although its measured value suffers from significant experimental uncertainty compared to other fundamental constants, its relationship to the spatial dimensionality of spacetime remains a topic of theoretical focus.
The variability in [crustal thickness](/… -
Primordial Black Hole
Linked via "fundamental constants"
Effects on Spacetime Permeability
The intense gravitational fields associated with PBHs introduce non-linearities into the local structure of the vacuum, which theoretically affects fundamental constants. Specifically, models analyzing extreme gravitational lensing events associated with $\text{PBH}$ clusters suggest that the standard permeability of free space, $\mu_0$, may deviate from isotropy near the event horizon.
Th…