%0 Journal Article
%A Gharibyan, Vahagn
%A Balewski, Klaus
%T Planck-Scale Gravity Test at PETRA
%J Journal of modern physics
%V 07
%N 09
%@ 2153-120X
%C Irvine, Calif.
%I Scientific Research Publ.
%M PUBDB-2016-04302
%M DESY-16-029
%P 964 - 981
%D 2016
%X Quantum  or  torsion  gravity  models  predict  unusual  properties  of  spacetime  at  very  short  distances. In particular, near the Planck length, around 10<sup>−35</sup> m, empty space may behave as a crystal, singly or doubly  refractive.  This  hypothesis,  however,  remains  uncheckable  for  any  direct  measurement  since  the  smallest  distance  accessible in  experiment  is  about 10<sup>−19</sup>  m  at  the  LHC.  Here  we propose a laboratory test to measure space birefringence or refractivity induced by gravity. A sensitivity 10<sup>−31</sup>  m  for  doubly  and  10<sup>−28</sup>  m  for  singly  refractive  vacuum  could  be  reached  with PETRA 6 GeV beam exploring UV laser Compton scattering.
%F PUB:(DE-HGF)29 ; PUB:(DE-HGF)16
%9 ReportJournal Article
%R 10.4236/jmp.2016.79088
%U https://bib-pubdb1.desy.de/record/310565