Abstract: The beam-helicity asymmetry in associated electroproduction of real photons,ep →eγπN, in the ∆(1232)-resonance region is measured using the longitudinally polarized Hera positron beam and an unpolarized hydrogen target. Azimuthal Fourier amplitudes of this asymmetry are extracted separately for two channels,ep→eγπ0p and ep → eγπ+n, from a data set collected with a recoil detector. All asymmetry amplitudes are found to be consistent with zero.
Beam-helicity asymmetry in associated electroproduction of real photons ep → eγπN in the Δ-resonance region
CIULLO, Giuseppe;CONTALBRIGO, Marco;FERRETTI, Paola;LENISA, Paolo;PAPPALARDO, Luciano Libero;STATERA, Marco;
2014
Abstract
Abstract: The beam-helicity asymmetry in associated electroproduction of real photons,ep →eγπN, in the ∆(1232)-resonance region is measured using the longitudinally polarized Hera positron beam and an unpolarized hydrogen target. Azimuthal Fourier amplitudes of this asymmetry are extracted separately for two channels,ep→eγπ0p and ep → eγπ+n, from a data set collected with a recoil detector. All asymmetry amplitudes are found to be consistent with zero.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
