Ratios of helicity amplitudes for exclusive $\rho^0$ electroproduction on transversely polarized proton

@inproceedings{Manaenkov2017RatiosOH,
  title={Ratios of helicity amplitudes for exclusive \$\rho^0\$ electroproduction on transversely polarized proton},
  author={S. Manaenkov},
  year={2017}
}
Exclusive ρ 0 -meson electroproduction is studied by the HERMES experiment, using the 27.6 GeV longitudinally polarized electron/positron beam of HERA and a transversely polarized hydrogen target, in the kinematic region 1.0 GeV 2 Q 2 2 , 3.0 GeV t ′ 2 . Using an unbinned maximum-likelihood method, 25 parameters are extracted. They determine the real and imaginary parts of the ratios of certain helicity amplitudes describing ρ 0 -meson production by a virtual photon, where the denominator is… Expand
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