Measurements of the generalized electric and magnetic polarizabilities of the proton at low Q2 using the virtual-compton-scattering reaction.
The mean square polarizability radii of the proton have been measured for the first time in a virtual-Compton-scattering experiment performed at the MIT-Bates out-of-plane scattering facility. Response functions and polarizabilities obtained from a dispersion analysis of the data at Q2 = 0.057 GeV2/c2 are in agreement with O(p3) heavy baryon chiral perturbation theory. The data support the dominance of mesonic effects in the polarizabilities.
Bourgeois
P
P
Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Sato
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Y
Shaw
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J
Alarcon
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R
Bernstein
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AM
Bertozzi
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W
Botto
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T
Calarco
J
J
Casagrande
F
F
Distler
M O
MO
Dow
K
K
Farkondeh
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M
Georgakopoulos
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Gilad
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S
Hicks
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R
Holtrop
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M
Hotta
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A
Jiang
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X
Karabarbounis
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A
Kirkpatrick
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Kowalski
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Milner
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Miskimen
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R
Nakagawa
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I
Papanicolas
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Sarty
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AJ
Sirca
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Six
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E
Sparveris
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NF
Stave
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Stiliaris
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E
Tamae
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T
Tsentalovich
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G
Tschalaer
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C
Turchinetz
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W
Zhou
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ZL
Zwart
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T