Static forces and virtual-particle exchange: Difference between revisions

Revision as of 16:20, 17 February 2018

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===Gravitation===

The Lagrangian for theA gravitational field is [[Spin (physics)|spin]]-2. The disturbance is generated by the [[stress–energy tensor]] <math> T^{\mu \nu} </math>; consequently, the Lagrangian for the gravitational field is [[Spin (physics)|spin]]-2. If the disturbances are at rest, then the only component of the stress–energy tensor that survivespersists is the <math> 00 </math> component. If we use the same trick of giving the [[graviton]] some mass and then taking the mass to zero at the end of the calculation the propagator becomes

The Lagrangian for the gravitational field is [[Spin (physics)|spin]]-2. The disturbance is generated by the [[stress–energy tensor]] <math> T^{\mu \nu} </math>. If the disturbances are at rest, then the only component of the stress–energy tensor that survives is the <math> 00 </math> component. If we use the same trick of giving the [[graviton]] some mass and then taking the mass to zero at the end of the calculation the propagator becomes

:<math>