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Determination of the scalar polarizabilities of the proton using beam asymmetry Σ3 in Compton scattering

Authors :
Sokhoyan, V.
Downie, E. J.
Mornacchi, E.
McGovern, J. A.
Krupina, N.
Afzal, F.
Ahrens, J.
Akondi, C. S.
Annand, J. R. M.
Arends, H. J.
Beck, R.
Braghieri, A.
Briscoe, W. J.
Cividini, F.
Collicott, C.
Costanza, S.
Denig, A.
Dieterle, M.
Ferretti, M.
Gardner, S.
Garni, S.
Glazier, D. I.
Glowa, D.
Gradl, W.
Gurevich, G.
Hamilton, D.
Hornidge, D.
Huber, G. M.
Käser, A.
Kashevarov, V. L.
Keshelashvili, I.
Kondratiev, R.
Korolija, M.
Krusche, B.
Lensky, V.
Linturi, J.
Lisin, V.
Livingston, K.
MacGregor, I.J.D.
Macrae, R.
Manley, D. M.
Martel, P. P.
Middleton, D. G.
Miskimen, R.
Mushkarenkov, A.
Neiser, A.
Oberle, M.
Ortega Spina, H.
Ostrick, M.
Ott, P.
Otte, P. B.
Oussena, B.
Paudyal, D.
Pedroni, P.
Polonski, A.
Prakhov, S.
Rajabi, A.
Rostomyan, T.
Sarty, A.
Schumann, S.
Spieker, K.
Steffen, O.
Strakovsky, I. I.
Strandberg, B.
Strub, T.
Supek, I.
Thiel, A.
Thiel, M.
Thomas, A.
Unverzagt, M.
Wagner, S.
Watts, D. P.
Wettig, J.
Witthauer, L.
Werthmüller, D.
Wolfes, M.
Zana, L.
Publication Year :
2017
Publisher :
Springer, 2017.

Abstract

The scalar dipole polarizabilities, αE1αE1 and βM1βM1 , are fundamental properties related to the internal dynamics of the nucleon. The currently accepted values of the proton polarizabilities were determined by fitting to unpolarized proton Compton scattering cross section data. The measurement of the beam asymmetry Σ3Σ3 in a certain kinematical range provides an alternative approach to the extraction of the scalar polarizabilities. At the Mainz Microtron (MAMI) the beam asymmetry was measured for Compton scattering below pion photoproduction threshold for the first time. The results are compared with model calculations and the influence of the experimental data on the extraction of the scalar polarizabilities is determined.

Subjects

Subjects :
Nuclear Theory
Physics::Accelerator Physics
Physics::Atomic Physics
Nuclear Experiment

Details

Language :
English
ISSN :
14346001
Database :
OpenAIRE
Accession number :
edsair.core.ac.uk....be0514aea53172a7bb2de317f1b1a688

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