Physics Research Works
Permanent URI for this collectionhttp://hdl.handle.net/1903/1597
Browse
2 results
Search Results
Item Coherent π0 photoproduction on the deuteron up to 4 GeV(1999-09) Meekins, D.G.; Abbott, D.J.; Ahmidouch, A.; Armstrong, C.S.; Arrington, J.; Assamagan, K.A.; Baker, O.K.; Barrow, S.P.; Beatty, D.P.; Beck, D.H.; Beedoe, S.Y.; Beise, E.J.; Belz, J.E.; Bochna, C.; Bosted, P.E.; Brash, E.J.; Breuer, H.; Cadman, R.V.; Cardman, L.; Carlini, R.D.; Cha, J.; Chant, N.S.; Collins, G.; Cothran, C.; Cummings, W.J.; Danagoulian, S.; Duncan, F.A.; Dunne, J.A.; Dutta, D.; Eden, T.; Ent, R.; Filippone, B.W.; Forest, T.A.; Fortune, H.T.; Frolov, V.V.; Gao, H.; Geesaman, D.F.; Gilman, R.; Gueye, P.L.J.; Gustafsson, K.K.; Hansen, J.-O.; Harvey, M.; Hinton, W.; Holt, R.J.; Jackson, H.E.; Keppel, C.E.; Khandaker, M.A.; Kinney, E.R.; Klein, A.; Koltenuk, D.M.; Kumbartzki, G.; Lung, A.F.; Mack, D.J.; Madey, R.; Markowitz, P.; McFarlane, K.W.; McKeown, R.D.; Meziani, Z.-E.; Miller, M.A.; Mitchell, J.H.; Mkrtchyan, H.G.; Mohring, R.M.; Napolitano, J.; Nathan, A.M.; Niculescu, G.; Niculescu, I.; O'Neill, T.G.; Owen, B.R.; Pate, S.F.; Potterveld, D.H.; Price, J.W.; Rakness, G.L.; Ransome, D.; Reinhold, J.; Rutt, P.M; Salgado, C.W.; Savage, G.; Segel, R.E.; Simicevic, N.; Stoler, P.; Suleiman, R.; Tang, L.; Terburg, B.P.; van Westrum, D.; Vulcan, W.F.; Williamson, S.E.; Witkowski, M.T.; Wood, S.A.; Yan, C.; Zeidman, B.The differential cross section for 2H(γ,d)π0 has been measured at deuteron center-of-mass angles of 90° and 136°. This work reports the first data for this reaction above a photon energy of 1 GeV, and permits a test of the apparent constituent counting rule and reduced nuclear amplitude behavior as observed in elastic ed scattering. Measurements were performed up to a photon energy of 4.0 GeV, and are in good agreement with previous lower energy measurements. Overall, the data are inconsistent with both constituent-counting rule and reduced nuclear amplitude predictions.Item Separation of the Longitudinal and Transverse Cross Sections in the p(e, e′K+)Λ and p(e, e′K+)Σ0 Reactions(2003-05) Mohring, R.M.; Abbott, D.; Ahmidouch, A.; Amatuni, A.; Ambrozewicz, P.; Angelescu, T.; Armstrong, C.S.; Arrington, J.; Assamagan, K.; Avery, S.; Bailey, K.; Beard, K.; Beedoe, S.; Beise, E.J.; Breuer, H.; Carlini, R.; Cha, J.; Change, C.C.; Chant, N.; Cisbani, E.; Collins, G.; Cummings, W.; Danagoulian, S.; De Leo, R.; Duncan, F.; Dunne, J.; Dutta, D.; Eden, T.; Ent, R.; Eyraud, L.; Ewell, L.; Finn, M.; Fortune, T.; Frolov, V.; Frullani, S.; Furget, C.; Garibaldi, F.; Gaskell, D.; Geesaman, D.F.; Gueye, P.; Gutafsson, K.K.; Gensen, J.O.; Harvey, M.; Hinton, W.; Hungerford, E.; Iodice, M.; Jackson, C.; Keppel, C.; Kim, W.; Kino, K.; Koltenuk, D.; Kox, S.; Kramer, L.; Leone, T.; Lung, A.; Mack, D.; Madey, R.; Maeda, M.; Majewski, S.; Markowitz, P.; Mart, T.; Martoff, C.J.; Meekins, D.; Mihul, A.; Mitchell, J.; Mkrtchyan, H.; Mtingwa, S.; Niculescu, I.; Perrino, R.; Potterveld, D.; Price, J.W.; Raue, B.A.; Real, J.S.; Reinhold, J.; Roos, P.; Saito, T.; Savage, G.; Sawafta, R.; Segel, R.; Stepanyan, S.; Stoler, P.; Tadevosian, V.; Tang, L.; Teodorescu, L.; Terasawa, T.; Tsubota, H.; Urciuoli, M.; Volmer, J.; Vulcan, W.; Welch, T.P.; Williams, R; Wood, S.; Yan, C.; Zeidman, B.We report measurements of cross sections for the reaction p(e,e′K+)Y, for both the Λ and Σ0 hyperon states, at an invariant mass of W =1.84 GeV and four-momentum transfers 0.5 < Q2 < 2 (GeV/c)2. Data were taken for three values of virtual photon polarization ε, allowing the decom- position of the cross sections into longitudinal and transverse components. The Λ data is a revised analysis of prior work, whereas the Σ0 results have not been previously reported.