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.MSalgado, 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.PhysicsPhoton energyDeuteronArticle