6533b82ffe1ef96bd1295d99
RESEARCH PRODUCT
Observable traces of non-metricity: new constraints on metric-affine gravity
Michele RoncoAdrià Delhom-latorreGonzalo J. Olmosubject
PhysicsHigh Energy Physics - TheoryNuclear and High Energy Physics010308 nuclear & particles physicsScatteringPhysics beyond the Standard ModelFOS: Physical sciencesTorsion (mechanics)ObservableGeneral Relativity and Quantum Cosmology (gr-qc)16. Peace & justice01 natural scienceslcsh:QC1-999General Relativity and Quantum CosmologyGravitationTheoretical physicsClassical mechanicsHigh Energy Physics - Theory (hep-th)0103 physical sciencesNuclear and High Energy Physics; theories of gravity; geometric quantitiesAffine transformation010306 general physicsQuantumlcsh:Physicsdescription
Relaxing the Riemannian condition to incorporate geometric quantities such as torsion and non-metricity may allow to explore new physics associated with defects in a hypothetical space-time microstructure. Here we show that non-metricity produces observable effects in quantum fields in the form of 4-fermion contact interactions, thereby allowing us to constrain the scale of non-metricity to be greater than 1 TeV by using results on Bhabha scattering. Our analysis is carried out in the framework of a wide class of theories of gravity in the metric-affine approach. The bound obtained represents an improvement of several orders of magnitude to previous experimental constraints.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-05-01 |