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Spacetime foam , CPT anomaly , and photon propagation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Klinkhamer, Frans R. Rupp, Christian |
| Copyright Year | 2005 |
| Abstract | Institut für Theoretische Physik, Universität Karlsruhe (TH), 76128 Karlsruhe, Germany Abstract The CPT anomaly of certain chiral gauge theories has been established previously for flat multiply connected spacetime manifolds M of the type R3 ×S1, where the noncontractible loops have a minimal length. In this article, we show that the CPT anomaly also occurs for manifolds where the noncontractible loops can be arbitrarily small. Our basic calculation is performed for a flat noncompact manifold with a single “puncture,” namely M = R2 × (R2 \ {0}). A hypothetical spacetime foam might have many such punctures (or other structures with similar effects). Assuming the multiply connected structure of the foam to be time independent, we present a simple model for photon propagation, which generalizes the single-puncture result. This model leads to a modified dispersion law of the photon. Observations of high-energy photons (gamma-rays) from explosive extragalactic events can then be used to place an upper bound on the typical length scale of these punctures. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://cds.cern.ch/record/688603/files/0312032.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Anomaly detection CPT (file format) Captopril Chirality (chemistry) Multiplication Photon mapping Photons Propagation delay Puncture wound Radiation Software propagation manifold |
| Content Type | Text |
| Resource Type | Article |
