First Determination of Generalized Polarizabilities of the Proton by a Virtual Compton Scattering Experiment

Journal Article · Mon Jul 24 00:00:00 EDT 2000 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.85.708· OSTI ID:20217236

Roche, J ^[1]; Friedrich, J M ^[2]; Lhuillier, D ^[1]; Bartsch, P ^[2]; Baumann, D ^[2]; Berthot, J ^[3]; Bertin, P Y ^[3]; Breton, V ^[3]; Boeglin, W U ^[2]; Boehm, R ^[2]

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1. CEA Saclay, DSM/DAPNIA/SPhN, 91191 Gif-sur-Yvette Cedex, (France)
2. Institut fuer Kernphysik, Universitaet Mainz, 55099 Mainz, (Germany)
3. LPC de Clermont-Fd, IN2P3-CNRS, Universite Blaise Pascal, 63177 Aubiere Cedex, (France)

Absolute differential cross sections for the reaction ep{yields}ep{gamma} have been measured at a four-momentum transfer with virtuality Q{sup 2}=0.33 GeV{sup 2} 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. (c) 2000 The American Physical Society.

• OSTI ID: 20217236
• Journal Information: Physical Review Letters, Vol. 85, Issue 4; Other Information: PBD: 24 Jul 2000; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRON-PROTON INTERACTIONS
DIFFERENTIAL CROSS SECTIONS
POLARIZABILITY
STRUCTURE FUNCTIONS
PROTONS
COMPTON EFFECT
PHOTON-PROTON INTERACTIONS
VIRTUAL PARTICLES
EXPERIMENTAL DATA