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High Energy Astrophysics Tests of Lorentz Invariance and Quantum Gravity ModelsHigh energy astrophysics observations provide the best possibilities to detect a very small violation of Lorentz invariance such as may be related to the structure of space-time near the Planck scale of approx.10(exp -35) m. I will discuss the possible signatures of Lorentz invariance violation (LIV) that can be manifested by observing of the spectra, polarization, and timing of gamma-rays from active galactic nuclei and gamma-ray bursts. Other sensitive tests are provided by observations of the spectra of ultrahigh energy cosmic rays and neutrinos. Using the latest data from the Pierre Auger Observatory one can already derive an upper limit of 4.5 x 10(exp -23) on the fraction of LIV at a Lorentz factor of approx. 2 x 10(exp 11). This result has fundamental implications for quantum gravity models. I will also discuss the possibilities of using more sensitive space-based detection techniques to improve searches for LIV in the future. I will also discuss how the LIV formalism casts doubt on the OPERA superluminal neutrino claim.
Document ID
20120015923
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Stecker, Floyd W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 26, 2013
Publication Date
October 13, 2012
Subject Category
Astrophysics
Report/Patent Number
GSFC.ABS.7289.2012
Meeting Information
Meeting: Testing Lorentz Invariance with Photons
Location: Swarhmore, PA
Country: United States
Start Date: October 13, 2012
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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