Lower bound on the value of the fine-structure constant

Details Lower bound on the value of the fine-structure constant Lower bound on the value of the fine-structure constant

2010-09-24

arxiv.org/abs/1009.4788v2

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, 1 figure

Scientific paper

Recently, we have proposed the existence of a universal relation between the maximal electric charge and total mass of any weakly self-gravitating object: $Z\leq Z^*={\alpha}^{-1/3}A^{2/3}$, where $Z$ is the number of protons, $A$ is the total baryon (mass) number, and $\alpha=e^2/\hbar c$ is the fine-structure constant. Motivated by this novel bound, we explore the $(Z,A)$-relation of atomic nuclei as deduced from the Weizs\"acker semi-empirical mass formula. It is shown that {\it all} nuclei, including the meta-stable maximally charged ones, conform to the upper bound. Moreover, we suggest that the new charge-mass bound places an interesting constraint on the value of the fine-structure constant: $\alpha\gtrsim 1/323$.

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