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@ARTICLE{Gharibyan:425672,
      author       = {Gharibyan, Vahagn and Adler, V. and Allfrey, P. D. and
                      Bell, M. A. and Belusic, Bastian Daniel and Block, Andreas
                      and Bozhko, Yury and Coughlan, J. A. and Dementiev, R. K.
                      and Deshpande, A. and Ferencei, J. and Goncalo, R. and
                      Hiller, K. H. and Kaiser, R. and Kammering, Raimund and
                      Krause, Bernward and Ma, B.-Q. and Mattingly, M. C. K. and
                      Padhi, S. and Perieanu, A. and Protopopescu, D. and Ryan, P.
                      and Schaffran, Joern and Schmid, Peter and Seebach, Michael
                      and Sombrowski, Elke and Susinno, G. and Wang, M. and Wick,
                      K. and Wobisch, M. and Zichichi, A.},
      title        = {{E}vidence for {P}arity {V}iolation in {G}ravitational
                      {F}ields},
      reportid     = {PUBDB-2019-03349, DESY-18-171},
      year         = {2018},
      abstract     = {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$^{−5}$ which corresponds to a
                      helicity-dependent difference in the gravitational
                      potentials of (1.7±0.2)·10$^{−14}$. 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.},
      cin          = {MDI 2 / MKS / MCS / MEA / FLA / MIN},
      cid          = {$I:(DE-H253)MDI_2-20120731$ / I:(DE-H253)MKS-20120806 /
                      I:(DE-H253)MCS-20120806 / I:(DE-H253)MEA-20120806 /
                      I:(DE-H253)FLA-20120731 / I:(DE-H253)MIN-20120731},
      pnm          = {631 - Accelerator R $\&$ D (POF3-631)},
      pid          = {G:(DE-HGF)POF3-631},
      experiment   = {EXP:(DE-588)4443767-5},
      typ          = {PUB:(DE-HGF)25 / PUB:(DE-HGF)29},
      url          = {https://bib-pubdb1.desy.de/record/425672},
}