Near threshold electroproduction of the ω meson at Q 2
Electroproduction of the ω meson was investigated in 1H(e,e′p)ω reaction. The measurement was performed at a four-momentum transfer Q2≈0.5 GeV2. Angular distributions of the virtual photon-proton center-of-momentum cross sections have been extracted over the full angular range. These distributions exhibit a strong enhancement over t-channel parity exchange processes in the backward direction. According to a newly developed electroproduction model, this enhancement provides significant evidence of resonance formation in the γ*p → ωp reaction channel.
Ambrozewicz, P; Mitchell, J; Dunne, J; Markowitz, P; Martoff, CJ; Reinhold, J; Zeidman, B; Abbott, DJ; Ahmidouch, A; Armstrong, CS; Arrington, J; Assamagan, KA; Bailey, K; Baker, OK; Beedoe, S; Breuer, H; Carlini, R; Cha, J; Collins, G; Cothran, C; Cummings, WJ; Danagoulian, S; Day, D; Duncan, F; Dutta, D; Eden, T; Ent, R; Ewell, L; Fortune, HT; Gao, H; Geesaman, DF; Gueye, P; Gustafsson, KK; Hansen, JO; Hinton, W; Keppel, CE; Klein, A; Koltenuk, D; Mack, DJ; Madey, R; Meekins, DG; Mkrtchyan, H; Mohring, RM; Mtingwa, SK; Niculescu, G; Niculescu, I; O'Neill, TG; Potterveld, D; Price, JW; Raue, BA; Roos, P; Savage, G; Sawafta, R; Segel, RE; Stepanyan, S; Tadevosyan, V; Tang, L; Terburg, BP; Wood, S; Yan, C; Zihlmann, B
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