$\hbar = c = 1$

The Yukawa potential  (aka. screened Coulomb potential) $V(r) = -(\alpha/r) \exp(-\mu r)$ is a universal potential for interactions mediate...

In a previous post , we point out in the d+1 dimensions, the Coulomb's law reads, \[ \varphi(r) = \frac{\Gamma(\frac{d-2}{2})}{4\pi^{\...

Figure: the Standard Model fermion mass hierarchy shown in the log scale.

Schwinger Effect According to quantum field theory, vacuum, the state of no nothingness, is actually filled with virtual particles. In p...

In Feb. 18, 2015, East Asians celebrated the Lunar New Year, the year of yang  (羊)。 Some English media suddenly found it hard to convey the ...