Determination of the scalar polarizabilities of the proton using beam asymmetry Sigma(3) in Compton scattering (CROSBI ID 251997)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Sokhoyan, V. ; Downie, E. J. ; Mornacchi, E. ; ... ; Korolija, M. ; ... ; 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.
A2 Collaboration
engleski
Determination of the scalar polarizabilities of the proton using beam asymmetry Sigma(3) in Compton scattering
The scalar dipole polarizabilities, alpha(E1) and beta(M1), 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 Sigma(3) 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.
tagged photon spectrometer ; magnetic polarizabilities ; nucleon polarizabilities ; polarized photons ; spin 1/2 ; mainz ; mami ; microtron ; hydrogen
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Podaci o izdanju
53
2017.
14
6
objavljeno
1434-6001
1434-601X
10.1140/epja/i2017-12203-0
