Measurement of the Parity-Violating Asymmetry in Inclusive Electroproduction of π- near the Δ0 Resonance
- Androić, Darko
- Armstrong, D. S.
- Arvieux, J.
- Bailey, S. L.
- Beck, D. H.
- Beise, E. J.
- Benesch, J.
- Benmokhtar, F.
- Bimbot, L.
- Birchall, J.
- Bosted, P.
- Breuer, H.
- Capuano, C. L.
- Chao, Y.-C.
- Coppens, A.
- Davis, C. A.
- Ellis, C.
- Flores, G.
- Franklin, G.
- Furget, C.
- Gaskell, D.
- Gericke, M. T. W.
- Grames, J.
- Guillard, G.
- Hansknecht, J.
- Horn, T.
- Jones, M. K.
- King, P. M.
- Korsch, W.
- Kox, S.
- Lee, L.
- Liu, J.
- Lung, A.
- Mammei, J.
- Martin, J. W.
- McKeown, R. D.
- Micherdzinska, A.
- Mihovilovic, M.
- Mkrtchyan, H.
- Muether, M.
- Page, S. A.
- Papavassiliou, V.
- Pate, S. F.
- Phillips, S. K.
- Pillot, P.
- Pitt, M. L.
- Poelker, M.
- Quinn, B.
- Ramsay, W. D.
- Real, J.-S.
- Roche, J.
- Roos, P.
- Schaub, J.
- Ševa, Tomislav
- Simicevic, N.
- Smith, G. R.
- Spayde, D. T.
- Stutzman, M.
- Suleiman, R.
- Tadevosyan, V.
- van Oers, W. T. H.
- Versteegen, M.
- Voutier, E.
- Vulcan, W.
- Wells, S. P.
- Williamson, S. E.
- Wood, S. A.
DOIAbstract
The parity-violating (PV) asymmetry of inclusive π-production in electron scattering from a liquid deuterium target was measured at backward angles. The measurement was conducted as a part of the G0 experiment, at a beam energy of 360 MeV. The physics process dominating pion production for these kinematics is quasifree photoproduction off the neutron via the Δ0 resonance. In the context of heavy-baryon chiral perturbation theory, this asymmetry is related to a low-energy constant dΔ- that characterizes the parity-violating γNΔ coupling. Zhu et al. calculated dΔ- in a model benchmarked by the large asymmetries seen in hyperon weak radiative decays, and predicted potentially large asymmetries for this process, ranging from Aγ-=-5.2 to +5.2 p...
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