First measurement of transferred polarization in the exclusive ep to e'K/sup +/ Lambda reaction
- Carman, D.S.
- Joo, K.
- Mestayer, M.D.
- Raue, B.A.
- Adams, G.
- Ambrozewicz, P.
- Anciant, E.
- Anghinolfi, M.
- Armstrong, D.S.
- Asavapibhop, B.
- Audit, G.
- Auger, T.
- Avakian, H.
- Bagdasaryan, H.
- Balls, J.P.
- Barrow, S.P.
- Battaglieri, M.
- Beard, K.
- Bektasoglu, M.
- Bellis, M.
- Bennhold, C.
- Bianchi, N.
- Biselli, A.S.
- Boiarinov, S.
- Bonner, B.E.
- Bouchigny, S.
- Bradford, R.
- Branford, D.
- Briscoe, W.J.
- Brooks, W.K.
- Burkert, V.D.
- Butuceanu, C.
- Calarco, J.R.
- Carnahan, B.
- Cazes, A.
- Cetina, C.
- Ciciani, L.
- Clark, R.
- Cole, P.L.
- Coleman, A.
- Cords, D.
- Corvisiero, P.
- Crabb, D.
- Crannell, H.
- Cummings, J.P.
- DeSanctis, E.
- Degtyarenko, P.V.
- Denizli, H.
- Dennis, L.
- DeVita, R.
- Dharmawardane, K.V.
- Dhuga, K.S.
- Djalali, C.
- Dodge, G.E.
- Doughty, D.
- Dragovitsch, P.
- Dugger, M.
- Dytman, S.
- Dzyubak, O.P.
- Eckhause, M.
- Egiyan, H.
- Egiyan, K.S.
- Elouadrhiri, L.
- Empl, A.
- Eugenio, P.
- Fatemi, R.
- Fedotov, G.
- Feuerbach, R.J.
- Ficenec, J.
- Forest, T.A.
- Funsten, H.
- Gaff, S.J.
- Gai, M.
- Garcon, M.
- Gavalian, G.
- Gilad, S.
- Gilfoyle, G.P.
- Giovanetti, K.L.
- Girard, P.
- Golovach, E.
- Gordon, C.I.O.
- Griffioen, K.
- Grimes, S.
- Guidal, M.
- Guillo, M.
- Guo, L.
- Gyurjyan, V.
- Hadjidakis, C.
- Hakobyan, R.S.
- Hardie, J.
- Heddle, D.
- Heimberg, P.
- Hersman, F.W.
- Hicks, K.
- Hicks, R.S.
- Holtrop, M.
- Hu, J.
- Hyde-Wright, C.E.
- Ishkhanov, B.
- Ito, M.M.
- Jenkins, D.
- Kelley, J.H.
- Kellie, J.D.
- Khandaker, M.
- Kim, K.Y.
- Kim, K.
- Kim, W.
- Klein, A.
- Klein, F.J.
- Klimenko, A.V.
- Klusman, M.
- Kossov, M.
- Kramer, L.H.
- Kuang, Y.
- Kuhn, S.E.
- Kuhn, J.
- Lachniet, J.
- Laget, J.M.
- Lawrence, D.
- Li, J.
- Livingston, K.
- Longhi, A.
- Lukashin, K.
- Manak, J.J.
- Marchand, C.
- Mart, T.
- McAleer, S.
- McCarthy, J.
- McNabb, J.W.C.
- Mecking, B.A.
- Mehrabyan, S.
- Melone, J.J.
- Meyer, C.A.
- Mikhailov, K.
- Minehart, R.
- Mirazita, M.
- Miskimen, R.
- Mokeev, V.
- Morand, L.
- Morrow, S.A.
- Mozer, M.U.
- Muccifora, V.
- Mueller, J.
- Murphy, L.Y.
- Mutchler, G.S.
- Napolitano, J.
- Nasseripour, R.
- Nelson, S.O.
- Niccolai, S.
- Niculescu, G.
- Niculescu, I.
- Niczyporuk, B.B.
- Niyazov, R.A.
- Nozar, M.
- O'Rielly, G.V.
- Opper, A.K.
- Osipenko, M.
- Park, K.
- Paschke, K.
- Pasyuk, E.
- Peterson, G.
- Pivnyuk, N.
- Pocanic, D.
- Pogorelko, O.
- Polli, E.
- Pozdniakov, S.
- Preedom, B.M.
- Price, J.W.
- Prok, Y.
- Protopopescu, D.
- Qin, L.
- Riccardi, G.
- Ricco, G.
- Ripani, M.
- Ritchie, B.G.
- Ronchetti, F.
- Rossi, P.
- Rowntree, D.
- Rubin, P.
- Sabatie, F.
- Sabourov, K.
- Salgado, C.
- Santoro, J.
- Sapunenko, V.
- Schumacher, R.A.
- Serov, V.S.
- Sharabian, Y.G.
- Shaw, J.
- Simionatto, S.
- Skabelin, A.V.
- Smith, E.S.
- Smith, L.C.
- Sober, D.I.
- Spraker, M.
- Stavinsky, A.
- Stepanyan, S.
- Stoler, P.
- Taiuti, M.
- Taylor, S.
- Tedeschi, D.J.
- Thoma, U.
- Thompson, R.
- Todor, L.
- Tur, C.
- Ungaro, M.
- Vineyard, M.F.
- Vlassov, A.V.
- Wang, K.
- Weinstein, L.B.
- Weller, H.
- Weygand, D.P.
- Whisnant, C.S.
- Wolin, E.
- Wood, M.H.
- Yegneswaran, A.
- Yun, J.
- Zhang, B.
- Zhao, J.
- Zhou, Z.
DOIAbstract
The first measurements of the transferred polarization for the exclusive ep to e'K + Lambda reaction have been performed at Jefferson Laboratory using the CLAS spectrometer. A 2.567 GeV beam was used to measure the hyperon polarization over Q/sup 2/ from 0.3 to 1.5 (GeV/c)/sup 2/, W from 1.6 to 2.15 GeV, and over the full K/sup +/ center-of-mass angular range. Comparison with predictions of hadrodynamic models indicates strong sensitivity to the underlying resonance contributions. A nonrelativistic quark-model interpretation of our data suggests that the ss quark pair is produced with spins predominantly antialigned. Implications for the validity of the most widely used quark-pair creation operator are discussed
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