Polarization transfer in proton Compton scattering at high momentum transfer

Hamilton, D.J. et al. (2005) Polarization transfer in proton Compton scattering at high momentum transfer. Physical Review Letters, 94(24), p. 242001. (doi: 10.1103/PhysRevLett.94.242001)

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Publisher's URL: http://dx.doi.org/10.1103/PhysRevLett.94.242001


Compton scattering from the proton was investigated at s=6.9  GeV<sup>2</sup> and t=-4.0  GeV<sup>2</sup> via polarization transfer from circularly polarized incident photons. The longitudinal and transverse components of the recoil proton polarization were measured. The results are in disagreement with a prediction of perturbative QCD based on a two-gluon exchange mechanism, but agree well with a prediction based on a reaction mechanism in which the photon interacts with a single quark carrying the spin of the proton.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Annand, Dr John and Hamilton, Dr David
Authors: Hamilton, D.J., Mamyan, V.H., Aniol, K.A., Annand, J.R.M., Bertin, P.Y., Bimbot, L., Bosted, P., Calarco, J.R., Camsonne, A., Chang, G.C., Chang, T.H., Chen, J.P., Choi, S., Chudakov, E., Danagoulian, A., 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., Hansen, J.O., Hayes, D., Higinbotham, D., Hinton, W., Horn, T., Howell, C., Hunyady, T., Hyde-Wright, 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., 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., Roedelbronn, M., 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:24 June 2005

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