Constraining the Noncommutative Spectral Action via Astrophysical Observations
- Institute of Gravitation and the Cosmos, Penn State University, State College, Pennsylvania 16801 (United States)
The noncommutative spectral action extends our familiar notion of commutative spaces, using the data encoded in a spectral triple on an almost commutative space. Varying a rather simple action, one can derive all of the standard model of particle physics in this setting, in addition to a modified version of Einstein-Hilbert gravity. In this Letter we use observations of pulsar timings, assuming that no deviation from general relativity has been observed, to constrain the gravitational sector of this theory. While the bounds on the coupling constants remain rather weak, they are comparable to existing bounds on deviations from general relativity in other settings and are likely to be further constrained by future observations.
- OSTI ID:
- 21470914
- Journal Information:
- Physical Review Letters, Vol. 105, Issue 10; Other Information: DOI: 10.1103/PhysRevLett.105.101602; (c) 2010 American Institute of Physics; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COSMOLOGY AND ASTRONOMY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASTROPHYSICS
COMMUTATION RELATIONS
COUPLING CONSTANTS
GENERAL RELATIVITY THEORY
GRAVITATION
PULSARS
SPACE
STANDARD MODEL
COSMIC RADIO SOURCES
FIELD THEORIES
GRAND UNIFIED THEORY
MATHEMATICAL MODELS
PARTICLE MODELS
PHYSICS
QUANTUM FIELD THEORY
RELATIVITY THEORY
UNIFIED GAUGE MODELS