Compton-scattering cross section on the proton at high momentum transfer

Danagoulian, A. et al. (2007) Compton-scattering cross section on the proton at high momentum transfer. Physical Review Letters, 98, 152001. (doi: 10.1103/PhysRevLett.98.152001)

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Cross-section values for Compton scattering on the proton were measured at 25 kinematic settings over the range s=5–11 and −t=2–7  GeV<sup>2</sup> with a statistical accuracy of a few percent. The scaling power for the s dependence of the cross section at fixed center-of-mass angle was found to be 8.0±0.2, strongly inconsistent with the prediction of perturbative QCD. The observed cross-section values are in fair agreement with the calculations using the handbag mechanism, in which the external photons couple to a single quark.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Annand, Dr John and Hamilton, Dr David
Authors: Danagoulian, A., Mamyan, V.H., Roedelbronn, M., Aniol, K.A., Annand, J.R.M., Bertin, P.Y., Bimbot, L., Bosted, P., Calarco, J.R., Camsonne, A., Chang, C.C., Chang, T.H., Chen, J.P., Choi, S.H., Chudakov, E., Degtyarenko, P., de Jager, C.W., Deur, A., Dutta, D., Egiyan, K., Gao, H., Garibaldi, F., Gayou, O., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Hamilton, D.J., Hansen, J.O., Hayes, D., Higinbotham, D.W., Hinton, W., Horn, T., Howell, C., Hunyady, T., Hyde, C.E., Jiang, X., Jones, M.K., Khandaker, M., Ketikyan, A., Kubarovsky, V., Kramer, K., Kumbartzki, G., Laveissiere, G., LeRose, J., Lindgren, R.A., Margaziotis, D.J., Markowitz, P., McCormick, K., Meekins, D.G., Meziani, Z.E., Michaels, R., Moussiegt, P., Nanda, S., Nathan, A.M., Nikolenko, D.M., Nelyubin, V., Norum, B.E., Paschke, K., Pentchev, L., Perdrisat, C.F., Piasetzky, E., Pomatsalyuk, R., Punjabi, V.A., Rachek, I., Radyushkin, A., Reitz, B., Roche, R., Ron, G., Sabatie, F., Saha, A., Savvinov, N., Shahinyan, A., Shestakov, Y., Sirca, S., Slifer, K., Solvignon, P., Stoler, P., Tajima, S., Sulkosky, V., Todor, L., Vlahovic, B., Weinstein, L.B., Wang, K., Wojtsekhowski, B., Voskanyan, H., Xiang, H., Zheng, X., and Zhu, L.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN (Online):1079-7114
Published Online:09 April 2007

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