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

Sokhoyan, V. and Downie, E. J. and Mornacchi, E. and McGovern, J. A. and Krupina, N. and Afzal, F. and Ahrens, J. and Akondi, C. S. and Annand, J. R. M. and Arends, H.J. and Beck, R. and Braghieri, A. and Briscoe, W.J. and Cividini, F. and Collicott, C. and Costanza, S. and Denig, A. and Dieterle, M. and Ferretti, M. and Gardner, S. and Garni, S. and Glazier, D.I. and Glowa, D. and Gradl, W. and Gurevich, G. and Hamilton, D. and Hornidge, D. and Huber, G. M. and Kaeser, A. and Kashevarov, V. L. and Keshelashvili, I. and Kondratiev, R. and Korolija, M. and Krusche, B. and Lensky, V. and Linturi, J. and Lisin, V. and Livingston, K. and MacGregor, I. J. D. and Macrae, R. and Manley, D. M. and Martel, P. P. and Middleton, D. G. and Miskimen, R. and Mushkarenkov, A. and Neiser, A. and Oberle, M. and Ortega Spina, H. and Ostrick, M. and Ott, P. and Otte, P. B. and Oussena, B. and Paudyal, D. and Pedroni, P. and Rajabi, A. and Rostomyan, T. and Sarty, A. and Schumann, S. and Spieker, K. and Steffen, O. and Strakovsky, I. I. and Strandberg, B. and Strub, T. and Supek, I. and Thiel, A. and Thiel, M. and Thomas, A. and Unverzagt, M. and Wagner, S. and Watts, D. P. and Wettig, J. and Witthauer, L. and Werthmueller, D. and Wolfes, M. and Zana, L.. (2017) Determination of the scalar polarizabilities of the proton using beam asymmetry Σ3 in Compton scattering. European Physical Journal A: Hadrons and Nuclei, 53. p. 14.

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Official URL: http://edoc.unibas.ch/54087/

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Abstract

The scalar dipole polarizabilities, αE1 and βM1, 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 Σ3 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.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:EDP Sciences with Springer and Società Italiana di Fisica
ISSN:1434-6001
e-ISSN:1434-601X
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:27 Feb 2017 15:34
Deposited On:27 Feb 2017 15:34

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