Measurement of the Generalized Polarizabilities of the Proton in Virtual Compton Scattering at Q2= 0.92 and 1.76 GeV2
| dc.creator | The Jefferson Lab Hall A Collaboration | |
| dc.creator | Laveissiere, G. | |
| dc.date | 2004-04-27 | |
| dc.date | 2004-09-02 | |
| dc.date.accessioned | 2026-07-07T11:58:27Z | |
| dc.date.available | 2026-07-07T11:58:27Z | |
| dc.description | We report a Virtual Compton Scattering study of the proton at low CM energies. We have determined the structure functions $P_{LL}-P_{TT}/ε$ and $P_{LT}$, and the electric and magnetic Generalized Polarizabilities (GPs) $α_E(Q2)$ and $β_M(Q2)$ at momentum transfer Q2= 0.92 and 1.76 GeV2. The electric GP shows a strong fall-off with Q2, and its global behavior does not follow a simple dipole form. The magnetic GP shows a rise and then a fall-off; this can be interpreted as the dominance of a long-distance diamagnetic pion cloud at low Q2, compensated at higher Q2 by a paramagnetic contribution from $πN$ intermediate states. | |
| dc.description | 4 pages, 2 Figs. Version for PRL after PRL cancelled their request for reducing length of paper | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0404243 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0404243 | |
| dc.identifier | Phys.Rev.Lett.93:122001,2004 | |
| dc.identifier | doi:10.1103/PhysRevLett.93.122001 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/206231 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Measurement of the Generalized Polarizabilities of the Proton in Virtual Compton Scattering at Q2= 0.92 and 1.76 GeV2 | |
| dc.type | text |