title: First determination of generalized polarizabilities of the proton by a virtual compton scattering experiment
abstract: Absolute differential cross sections for the reaction ep-->epgamma have been measured at a four-momentum transfer with virtuality Q2 = 0.33 GeV2 and polarization epsilon = 0.62 in the range 33.6 to 111.5 MeV/c for the momentum of the outgoing photon in the photon-proton center of mass frame. The experiment has been performed with the high-resolution spectrometers at the Mainz Microtron MAMI. From the photon angular distributions, two structure functions which are a linear combination of the generalized polarizabilities have been determined for the first time.
authors.affiliation: CEA Saclay, DSM/DAPNIA/SPhN, 91191 Gif-sur-Yvette Cedex, France.
authors.initials: J
authors.lastname: Roche
authors.initials: JM
authors.lastname: Friedrich
authors.initials: D
authors.lastname: Lhuillier
authors.initials: P
authors.lastname: Bartsch
authors.initials: D
authors.lastname: Baumann
authors.initials: J
authors.lastname: Berthot
authors.initials: PY
authors.lastname: Bertin
authors.initials: V
authors.lastname: Breton
authors.initials: WU
authors.lastname: Boeglin
authors.initials: R
authors.lastname: Bohm
authors.initials: N
authors.lastname: D'Hose
authors.initials: S
authors.lastname: Derber
authors.initials: N
authors.lastname: Degrande
authors.initials: M
authors.lastname: Ding
authors.initials: MO
authors.lastname: Distler
authors.initials: JE
authors.lastname: Ducret
authors.initials: I
authors.lastname: Ewald
authors.initials: H
authors.lastname: Fonvieille
authors.initials: J
authors.lastname: Friedrich
authors.initials: PA
authors.lastname: Guichon
authors.initials: H
authors.lastname: Holvoet
authors.initials: CE
authors.lastname: Hyde-Wright
authors.initials: P
authors.lastname: Jennewein
authors.initials: M
authors.lastname: Kahrau
authors.initials: S
authors.lastname: Kerhoas
authors.initials: KW
authors.lastname: Krygier