Kostelecky, V. AlanLehnert, RalfPerry, Malcom J.2018-12-072018-12-072003-120556-2821http://hdl.handle.net/10400.1/11255Spacetime-varying coupling constants can be associated with violations of local Lorentz invariance and CPT symmetry. An analytical supergravity cosmology with a time-varying fine-structure constant provides an explicit example. Estimates are made for some experimental constraints.engHigher dimensional theoriesFine structure constantCpt violationFundamental constantsTime variationTesting cptStringsInvarianceSystemElectrodynamicsjournal article10.1103/PhysRevD.68.123511