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Electroproduction of kaons on light nuclei

2001; Elsevier BV; Volume: 691; Issue: 1-2 Linguagem: Inglês

10.1016/s0375-9474(01)00999-x

1873-1554

B. Zeidman, D. Abbott, A. Ahmidouch, P. Ambrozewicz, Christopher Armstrong, J. Arrington, R. Asaturyan, K. Assamagan, S. Avery, K. Bailey, O. K. Baker, S. Beedoe, Hu Bi-Tao, H. Breuer, D. S. Brown, R. Carlini, J. Cha, N. S. Chant, E. Christy, A. Cochran, L. Cole, G. Collins, C. D. Cothran, J. Crowder, W. J. Cummings, S. Danagoulian, F. Dohrmann, F. A. Duncan, J. Dunne, D. Dutta, T. Eden, M. Elaasar, R. Ent, L. Ewell, H. Fenker, H.T. Fortune, Y. Fujii, L. Gan, H. Gao, K. Garrow, D. F. Geesaman, P. Guèye, K. Gustafsson, K. Hafidi, O. Hansen, W. Hinton, H. E. Jackson, Henry Juengst, C. Keppel, A. Klein, D. Koltenuk, Y. Liang, J.H. Liu, A. Lung, D. Mack, R. Madey, P. Markowitz, C. J. Martoff, D. Meekins, Jason W. Mitchell, T. Miyoshi, H. Mkrtchyan, R. Mohring, S. Mtingwa, B. Mueller, T. G. O’Neill, G. Niculescu, I. Niculescu, D. H. Potterveld, J. W. Price, B. A. Raue, P. E. Reimer, J. Reinhold, J. Roche, P. G. Roos, M. Sarsour, Y. Sato, G. Savage, R. Sawafta, J. P. Schiffer, R. E. Segel, A. Yu. Semenov, S. Stepanyan, V. Tadevosian, S. Tajima, L. Tang, B. Terburg, A. Uzzle, S. A. Wood, Hiroaki Yamaguchi, C. Yan, C. Yan, L. Yuan, M. Zeier, B. Zihlmann,

Nuclear physics research studies

The A(e,e{prime}K{sup +})YX reaction on H, D, {sup 3}He, and {sup 4}He was investigated in Hall C at CEBAF. Data were obtained for Q{sup 2} {approx} 0.35 and 0.5 GeV{sup 2} at 3.245 GeV. The missing mass spectra for both H and D are fitted with Monte-Carlo simulations incorporating peaks corresponding to {Lambda} production on the proton and {Sigma} production on both the proton and neutron. For D, the cross section ratio {Sigma}{sup 0}/{Sigma}{sup {minus}} {approx} 2, and excess yield close to the thresholds for {Lambda} and {Sigma} production can be attributed to final-state interactions that 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 {Lambda}-hypernuclear states is seen and other structure may be present.