Weekly Seminars for July 2013
Thuersday July 4, 2013 4,00 pm
Aula C (Dept. of Mathematics & Physics, Univertsity of ROMA 3 - Via della Vasca Navale n° 64)
  Seminar of Astrophysics
Speaker:Dr. Henric Krawczynski

Institution: Washington University in St. Louis, USA

Title: Tests of Lorentz Invariance Violations with Gamma-ray Observations of Cosmic Sources.  

It is well known that the description of nature with the standard model of particle physics and general relativity is incomplete. Quite possibly, the models are only the low-energy limit of a unified theory of quantum gravity that holds at center of momentum energies close to the Planck energy. 
In this talk, I discuss quantitative constraints on Lorentz Invariance violating extensions of the standard model derived from X-ray and gamma-ray observations of Active Galactic Nuclei (AGNs) and Gamma-Ray Bursts (GRBs).
The analysis is based on the theoretical framework developed by Colladay & Kosteleck? (1997) and Kosteleck? and Mewes (2009). After presenting limits derived from time of flight measurements with the Fermi LAT, H.E.S.S., and VERITAS gamma-ray telescopes, I discuss the sensitivity of similar studies performed with hard X-ray and gamma-ray polarimeters
La Segreteria ICRA
c/o Dipartimento di Fisica
Sapienza Università di Roma
P.le A. Moro, 5
I - 00185 ROMA, Italy
tel.: +39 06 4991 4 254
fax: +39 06 4454992