Electroproduction of kaons on light nuclei
The A(e,e'Κ+)YX reaction on H, D, 3He, and 4He was investigated in Hall C at CE-BAF. Data were obtained for Q2 ≈ 0.35 and 0.5 GeV2 at 3.245 GeV. The missing mass spectra for both H and D are fitted with Monte-Carlo simulations incorporating peaks corresponding to Λ production on the proton and Σ production on both the proton and neutron. For D, the cross section ratio Σ0/Σ- ≈ 2, and excess yield close to the thresholds for Λ and Σ production can be attributed to final-state interactions; models are compared to the data. The analysis of the data for the He targets is in a more preliminary state with broader quasi-free peaks resulting from the higher Fermi momenta. Evidence for bound Λ-hypernuclear states is seen and other structure may be present.
Zeidman, B; Abbott, D; Ahmidouch, A; Ambrozewicz, P; Armstrong, CS; Arrington, J; Asaturyan, R; Assamagan, K; Avery, S; Bailey, K; Baker, OK; Beedoe, S; Bitao, H; Breuer, H; Brown, DS; Carlini, R; Cha, J; Chant, N; Christy, E; Cochran, A; Cole, L; Collins, G; Cothran, C; Crowder, J; Cummings, WJ; Danagoulian, S; Dohrmann, F; Duncan, F; Dunne, J; Dutta, D; Eden, T; Elaasar, M; Ent, R; Ewell, L; Fenker, H; Fortune, HT; Fujii, Y; Gan, L; Gao, H; Garrow, K; Geesaman, DF; Gueye, P; Gustafsson, K; Hafidi, K; Hansen, JO; Hinton, W; Jackson, HE; Juengst, H; Keppel, C; Klein, A; Koltenuk, D; Liang, Y; Liu, JH; Lung, A; Mack, D; Madey, R; Markowitz, P; Martoff, CJ; Meekins, D; Mitchell, J; Miyoshi, T; Mkrtchyan, H; Mohring, R; Mtingwa, SK; Mueller, B; O'Neill, TG; Niculescu, G; Niculescu, I; Potterveld, D; Price, JW; Raue, BA; Reimer, PE; Reinhold, J; Roche, J; Roos, P; Sarsour, M; Sato, Y; Savage, G; Sawafta, R; Schiffer, JP; Segel, RE; Semenov, A; Stepanyan, S; Tadevosian, V; Tajima, S; Tang, L; Terburg, B; Uzzle, A; Wood, S; Yamaguchi, H; Yan, C; Yuan, L; Zeier, M; Zihlmann, B
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