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Title: Cross-Section Measurement of Charged-Pion Photoproduction from Hydrogen and Deuterium
Authors: Zhu, L.Y.
Arrington, J.
Averett, T.
Beise, E.
Calarco, J.
Chang, T.
Chen, J.P.
Chudakov, E.
Coman, M.
Clasie, B.
Crawford, C.
Dieterich, S.
Dohrmann, F.
Dutta, D.
Fissum, K.
Frullani, S.
Gao, H.
Gilman, R.
Glashausser, C.
Gomez, J.
Hafidi, K.
Hansen, J.-O.
Higinbotham, D.W.
Holt, R.J.
de Jager, C.W.
Jiang, X.
Kinney, E.
Kramer, K.
Kumbartzki, G.
LeRose, J.
Liyanage, N.
Mack, D.
Markowitz, P.
McCormick, K.
Meekins, D.
Meziani, Z.-E.
Michaels, R.
Mitchell, J.
Nanda, S.
Potterveld, D.
Ransome, R.
Reimer, P.E.
Reitz, B.
Saha, A.
Schulte, E.C.
Seely, J.
Sirca, S.
Strauch, S.
Sulkosky, V.
Vlahovic, B.
Weinstein, L.B.
Wijesooriya, K.
Williamson, C.F.
Wojtsekhowski, B.
Xiang, H.
Xiong, F.
Xu, W.
Zeng, J.
Zheng, X.
Jefferson Lab Hall A Colloboration
Type: Article
Keywords: hydrogen
Issue Date: 11-Jun-2003
Publisher: American Physical Society
Citation: Zhu, L.Y. et al. "Cross-Section Measurement of Charged-Pion Photoproduction from Hydrogen and Deuterium." Physical Review Letters 91, no. 2 (2003): 022003.
Abstract: We have measured the differential cross section for the γn→π-p and γp→π+n reactions at θc.m.=90° in the photon energy range from 1.1 to 5.5 GeV at Jefferson Lab (JLab). The data at Eγ≳3.3   GeV exhibit a global scaling behavior for both π- and π+ photoproduction, consistent with the constituent counting rule and the existing π+ photoproduction data. Possible oscillations around the scaling value are suggested by these new data. The data show enhancement in the scaled cross section at a center-of-mass energy near 2.2 GeV. The cross section ratio of exclusive π- to π+ photoproduction at high energy is consistent with the prediction based on one-hard-gluon-exchange diagrams.
Required Publisher Statement: © 2003 The American Physical Society
Appears in Collections:Physics Research Works

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