Cross section measurements of charged pion photoproduction in hydrogen and deuterium from 1.1 to 5.5 GeV


Journal Article

The differential cross sections for the γn → π-p and the γp → π+n processes were measured at Jefferson Lab. The photon energies ranged from 1.1 to 5.5 GeV, corresponding to center-of-mass energies from 1.7 to 3.4 GeV. The pion center-of-mass angles varied from 50° to 110°. The π- and π+ photoproduction data both exhibit a global scaling behavior at high energies and high transverse momenta, consistent with the constituent counting rule prediction and the existing π+ data. The data suggest possible substructure of the scaling behavior, which might be oscillations around the scaling value. The data show an enhancement in the scaled cross section at center-of-mass energy near 2.2 GeV The differential cross section ratios [dσ/dt(γn → π-p)/dσ/dt(γp → π+n)] at high energies and high transverse momenta can be described by calculations based on one-hard-gluon-exchange diagrams. ©2005 The American Physical Society.

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, 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, ZE; Michaels, R; Mitchell, J; Nanda, S; Potterveld, D; Ransome, R; Reimer, PE; Reitz, B; Saha, A; Schulte, EC; Seely, J; ┼áirca, S; Strauch, S; Sulkosky, V; Vlahovic, B; Weinstein, LB; Wijesooriya, K; Williamson, C; Wojtsekhowski, B; Xiang, H; Xiong, F; Xu, W; Zeng, J; Zheng, X

Published Date

  • January 1, 2005

Published In

Volume / Issue

  • 71 / 4

Electronic International Standard Serial Number (EISSN)

  • 1089-490X

International Standard Serial Number (ISSN)

  • 0556-2813

Digital Object Identifier (DOI)

  • 10.1103/PhysRevC.71.044603

Citation Source

  • Scopus