Scattering of 30- to 95-Mev Photons by Protons

Low-energy γp scattering and determination of proton polarizabilities

“…All experimental data on the differential cross section of elastic γp scattering at photon energies ω < 150 MeV from FIAN, MAMI, SAL and other centres are split into two sets: 46 early data points of 1955-1974 [1][2][3][4][5][6] and 48 recent points of 90's [7][8][9][10]. In our analysis we take into account that authors of three works [5][6][7] made corrections to their data afterwards.…”

“…Table 2. The global-average proton polarizabilities in units of 10 −4 fm 3 extracted from early data [1][2][3][4][5][6], from recent data [7][8][9][10], and from all the data. Errors take into account statistical and systematic errors of the experimental cross sections.…”

“…For this reason no experiment can be excluded from our following analysis. Below we assume the possibility to combine the data of different experiments [1][2][3][4][5][6][7][8][9][10] taking into account the errors and a spread in the found values of α p and β p .…”

“…Table 1. Polarizabilities of the proton in units of 10 −4 fm 3 extracted from data of different experiments [1][2][3][4][5][6][7][8][9][10]. n is the number of experimental points.…”

“…Experimental studies of elastic γp scattering began in the middle of 50's years [1][2][3][4][5][6], but for the first time the proton polarizabilities α p and β p were extracted from experimental cross sections at photon energies ω ≤ 110 MeV in the works [3,6]. Results of new experiments [7][8][9][10] on γp scattering and new determinations of the values of α p and β p were published only in 90's.…”