Sep 19, 2020 · The fine structure constant is a measure of the probability, or frequency, of interactions between photons and electrons, contingent on the distribution of matter.

Jan 2, 2018 · The fine structure constant is one of the fundamental constants in nature, just like the speed of light or Planck's constant. It is there, and that's all we know for sure.

Nov 11, 2018 · The fine-structure constant is the strength of the electromagnetic force, which is mediated by massless photons. There is another force, the weak force, mediated by massive …

Jan 9, 2025 · Fine-structure constant, coupling strength and their experimental manifestation in the field of light-matter interaction Ask Question Asked 9 months ago Modified 9 months ago

This is a pet peeve of mine! People invest so much time studying perturbative renormalisation they confuse the couplings that appear in the low energy effective lagrangian with "the" fine …

Jun 11, 2024 · The gravitational constant is an artefact of an arbitrary choice of units, and so it has absolutely no meaning even within basic physics. The average distance between Sun and …

Jan 11, 2011 · It's because the atoms exist in the non-relativistic limit, and the fine-structure constant only determines the (order-of-magnitude estimate of the) speed of electrons in the …

Mar 5, 2021 · They are believed to have a vast number of different values for the fine structure constant, and for all other dimensionless physical constants. In inflationary cosmology the …

An unstable particle can decay into another particle and a photon. The decay rate will be proportional to the fine-structure constant (without the square root) but the detailed decay rate …

Sep 21, 2024 · The fine structure constant 1/137,035999... (at low 4-momentum) is a famous quantity of nature. How many significant digits could it have? More specifically, could it have …