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## Full-Text Articles in Physics

Spin Effects In The Effective Quantum Field Theory Of General Relativity, A Ross, Br Holstein

#### Spin Effects In The Effective Quantum Field Theory Of General Relativity, A Ross, Br Holstein

*Barry R Holstein*

The calculation of gravitational scattering of particles with various spin configurations in the framework of effective quantum field theory of general relativity is presented. We find that the long-range quantum and classical corrections to the spin-independent piece and the spin–orbit coupling piece of the scattering amplitude and the scattering potential are universal for different spin configurations, which leads us to propose this universality to be true for arbitrary spins. Furthermore, we give the leading corrections to the spin–spin coupling, and a comparison with scattering in QED is made.

Parametrization Dependence Of The Energy-Momentum Tensor And The Metric, Nej Bjerrum-Bohr, Jf Donoghue, Br Holstein

#### Parametrization Dependence Of The Energy-Momentum Tensor And The Metric, Nej Bjerrum-Bohr, Jf Donoghue, Br Holstein

*Barry R Holstein*

We use results by Kirilin to comment that in general relativity the nonleading terms in the energy-momentum tensor of a particle depends on the parameterization of the gravitational field. The classical observables are parameterization independent after a change in coordinates. The quantum effects that emerge within the same calculation of the metric also depend on the parameterization and a full quantum calculation requires the inclusion of further diagrams. However, within a given parameterization the quantum effects calculated by us in a previous paper are well defined. Flaws of Kirilin’s proposed alternate metric definition are described and we explain why ...

Second Born Approximation And Coulomb Scattering, Br Holstein

#### Second Born Approximation And Coulomb Scattering, Br Holstein

*Barry R Holstein*

We examine the problem of calculating higher order contributions to the Coulomb scattering amplitude. To make contact with the well known result, it is necessary to modify the conventional definition of the scattering amplitude.