Measurements of the generalized electric and magnetic polarizabilities of the proton at Low Q2 using the virtual-compton-scattering reaction

P. Bourgeois, Y. Sato, J. Shaw, Ricardo Alarcon, A. M. Bernstein, W. Bertozzi, T. Botto, J. Calarco, F. Casagrande, M. O. Distler, K. Dow, M. Farkondeh, S. Georgakopoulos, S. Gilad, R. Hicks, M. Holtrop, A. Hotta, X. Jiang, A. Karabarbounis, J. KirkpatrickS. Kowalski, R. Milner, R. Miskimen, I. Nakagawa, C. N. Papanicolas, A. J. Sarty, S. Sirca, E. Six, N. F. Sparveris, S. Stave, E. Stiliaris, T. Tamae, G. Tsentalovich, C. Tschalaer, W. Turchinetz, Z. L. Zhou, T. Zwart

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Abstract

The mean square polarizability radii of the proton have been measured for the first time in a virtual-Compton-scattering experiment performed at the MIT-Bates out-of-plane scattering facility. Response functions and polarizabilities obtained from a dispersion analysis of the data at Q2=0.057GeV2/c2 are in agreement with O(p3) heavy baryon chiral perturbation theory. The data support the dominance of mesonic effects in the polarizabilities.

Original languageEnglish (US)
Article number212001
JournalPhysical Review Letters
Volume97
Issue number21
DOIs
StatePublished - Nov 27 2006

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Bourgeois, P., Sato, Y., Shaw, J., Alarcon, R., Bernstein, A. M., Bertozzi, W., Botto, T., Calarco, J., Casagrande, F., Distler, M. O., Dow, K., Farkondeh, M., Georgakopoulos, S., Gilad, S., Hicks, R., Holtrop, M., Hotta, A., Jiang, X., Karabarbounis, A., ... Zwart, T. (2006). Measurements of the generalized electric and magnetic polarizabilities of the proton at Low Q2 using the virtual-compton-scattering reaction. Physical Review Letters, 97(21), [212001]. https://doi.org/10.1103/PhysRevLett.97.212001