%0 Electronic Article
%A Gharibyan, Vahagn
%A Adler, V.
%A Allfrey, P. D.
%A Bell, M. A.
%A Belusic, Bastian Daniel
%A Block, Andreas
%A Bozhko, Yury
%A Coughlan, J. A.
%A Dementiev, R. K.
%A Deshpande, A.
%A Ferencei, J.
%A Goncalo, R.
%A Hiller, K. H.
%A Kaiser, R.
%A Kammering, Raimund
%A Krause, Bernward
%A Ma, B.-Q.
%A Mattingly, M. C. K.
%A Padhi, S.
%A Perieanu, A.
%A Protopopescu, D.
%A Ryan, P.
%A Schaffran, Joern
%A Schmid, Peter
%A Seebach, Michael
%A Sombrowski, Elke
%A Susinno, G.
%A Wang, M.
%A Wick, K.
%A Wobisch, M.
%A Zichichi, A.
%T Evidence for Parity Violation in Gravitational Fields
%N DESY-18-171
%M PUBDB-2019-03349
%M DESY-18-171
%D 2018
%X Discrete symmetries in gravity have only been tested for low energy, non-relativistic matter, confirm-ing the perfectly symmetric general relativity.  A hint for high energy CP violation in gravitational fields  has  recently  been  found  in  the  HERA  Compton  polarimeter’s  two  spectra,  measured  with electron  and  positron  beams.   Here  we  report  results  of  the  analysis  of  the  same  polarimeter’s spectra,  acquired  during  2004–2007  and  tagged  by  laser  polarization  states  allowing  the separation of charge (C) and space (P) parity contributions.  The measured Compton edge energy asymmetry,  induced  by  the  laser  helicity  flips,  is  as  high  as  (4.9±0.5)·10<sup>−5</sup> which  corresponds to a helicity-dependent difference in the gravitational potentials of (1.7±0.2)·10<sup>−14</sup>.  In the case of the observed anomalous coupling’s energy independence, the spin asymmetric gravity will con-tribute to the galactic rotational curves and the cosmic microwave background.  Further analysis and calculations can determine whether the observed magnitude of the gravitational parity violation is sufficient for detaching these famous phenomena from the dark matter and the Big Bang theory.
%F PUB:(DE-HGF)25 ; PUB:(DE-HGF)29
%9 PreprintReport
%U https://bib-pubdb1.desy.de/record/425672