Compton scattering from the deuteron above pion-production threshold

B. Strandberg, J.R.M. Annand, W. Briscoe, J. Brudvik, F. Cividini, L. Clark, E.J. Downie, K. England, G. Feldman, K.G. Fissum, D.I. Glazier, K. Hamilton, K. Hansen, L. Isaksson, R. Al Jebali, M.A. Kovash, S. Lipschutz, M. Lundin, M. Meshkian, D.G. MiddletonL.S. Myers, D. O'Donnell, G. O'Rielly, B. Oussena, M.F. Preston, B. Schroder, B. Seitz, I. Strakovsky, M. Taragin

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The electromagnetic polarizabilities of the nucleon are fundamental nucleon-structure observables that characterize its response to external electromagnetic fields. The neutron polarizabilities can be accessed from Compton-scattering data on light nuclear targets. Recent measurements of the differential cross section for Compton scattering on the deuteron below the pion-production threshold have decreased the uncertainties in the neutron polarizabilities, yet the proton polarizabilities remain known substantially more accurately. As the sensitivity of the cross section to the polarizabilities increases with incident photon energy, measurements above the pion threshold may offer a way for an improved determination of the neutron polarizabilities. In this Rapid Communiciation, the first measurement of the cross section for coherent Compton scattering on the deuteron above the pion-production threshold is presented.
Original languageEnglish
Article number012201(R)
JournalPhysical Review C
Issue number1
Publication statusPublished - 23 Jul 2018
Externally publishedYes


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