Physics:Minimal subtraction scheme

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Short description: Renormalization scheme in quantum field theory

In quantum field theory, the minimal subtraction scheme, or MS scheme, is a particular renormalization scheme used to absorb the infinities that arise in perturbative calculations beyond leading order, introduced independently by Gerard 't Hooft and Steven Weinberg in 1973.[1][2] The MS scheme consists of absorbing only the divergent part of the radiative corrections into the counterterms.

In the similar and more widely used modified minimal subtraction, or MS-bar scheme (MS), one absorbs the divergent part plus a universal constant that always arises along with the divergence in Feynman diagram calculations into the counterterms. When using dimensional regularization, i.e. d4pμ4dddp, it is implemented by rescaling the renormalization scale: μ2μ2eγE4π, with γE the Euler–Mascheroni constant.

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