# Minimal subtraction scheme

In the similar and more widely used modified minimal subtraction, or MS-bar scheme (${\displaystyle {\overline {\text{MS}}}}$), one absorbs the divergent part plus a universal constant (which always arises along with the divergence in Feynman diagram calculations) into the counterterms. When using dimensional regularization, i.e. ${\displaystyle d^{4}p\to \mu ^{4-d}d^{d}p}$, it is implemented by rescaling the renormalization scale: ${\displaystyle \mu ^{2}\to \mu ^{2}{\frac {e^{\gamma _{E}}}{4\pi }}}$, with ${\displaystyle \gamma _{E}}$ the Euler–Mascheroni constant.