Cross-section measurement of charged-pion photoproduction from hydrogen and deuterium.


Journal Article

We have measured the differential cross section for the gamman-->pi(-)p and gammap-->pi(+)n reactions at theta(c.m.)=90 degrees in the photon energy range from 1.1 to 5.5 GeV at Jefferson Lab (JLab). The data at E(gamma) greater, similar 3.3 GeV exhibit a global scaling behavior for both pi(-) and pi(+) photoproduction, consistent with the constituent counting rule and the existing pi(+) 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 pi(-) to pi(+) photoproduction at high energy is consistent with the prediction based on one-hard-gluon-exchange diagrams.

Full Text

Duke Authors

Cited Authors

  • Zhu, LY; Arrington, J; Averett, T; Beise, E; Calarco, J; Chang, T; Chen, JP; 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, DW; Holt, RJ; De Jager, CW; 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, PE; Reitz, B; Saha, A; Schulte, EC; Seely, J; Sirca, S; Strauch, S; Sulkosky, V; Vlahovic, B; Weinstein, LB; Wijesooriya, K; Williamson, CF; Wojtsekhowski, B; Xiang, H; Xiong, F; Xu, W; Zeng, J; Zheng, X; Jefferson Lab Hall A Collaboration,

Published Date

  • July 11, 2003

Published In

Volume / Issue

  • 91 / 2

Start / End Page

  • 022003 -

PubMed ID

  • 12906473

Pubmed Central ID

  • 12906473

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.91.022003


  • eng