Showing papers by "Burt A. Ovrut published in 1981"
TL;DR: In this paper, the decoupling theorem of Appelquist and Carazzone is shown to be valid for quantum electrodynamics in arbitrary α-gauges and non-abelian gauge theory in α = 0, Landau gauge.
45 citations
TL;DR: In this paper, the decoupling theorem of Appelquist and Carazzone is shown to be valid and a consistent light effective field theory exists for quantum electrodynamics renormalized by minimal subtraction.
36 citations
TL;DR: In this paper, the effective lagrangian for non-abelian quantum field theories quantized in the covariant gauge for arbitrary gauge parameter α is calculated at the two-loop level.
23 citations
TL;DR: In this paper, a set of rules to be observed in the calculation of light-field, low-momentum processes using the method of effective field theory when minimal subtraction renormalization is employed.
11 citations
TL;DR: In this paper, the contribution of heavy fermions (muons) to the electron anomalous moment in quantum electrodynamics is considered within the context of effective field theories.
Abstract: The contribution of heavy fermions (muons) to the electron anomalous moment in quantum electrodynamics is considered within the context of effective field theories, correct to order ..cap alpha../sup 2/m/sup 2//M/sup 2/. Although no violation of decoupling is found, it is shown that the leading contribution of the muon to the electron magnetic moment is incorrectly given by the local effective Lagrangian obtained from functional integration over heavy fields. It is also shown that this same local effective Lagrangian, with all terms retained of arbitrary order in (1/M/sup 2/), has the wrong analyticity in this variable in that the electron anomalous moment has a term of O(..cap alpha../sup 2/(m/sup 4//M/sup 4/)ln(M/sup 2//m/sup 2/)) which cannot be obtained from this local effective Lagrangian. The correct calculation of these effects requires calculation of mixed light-heavy contributions, an issue previously discussed for contributions to operators of dimension < or =4.
6 citations
01 Feb 1981
TL;DR: In this article, the status of decoupling theorems and effective field theories is reviewed and it is emphasized that decoupled is valid for minimal subtraction if an effective field theory with appropriate effective couplings is constructed.
Abstract: The status of decoupling theorems and effective field theories is reviewed. It is emphasized that decoupling is valid for minimal subtraction if an effective field theory with appropriate effective couplings is constructed.
2 citations