Neutron Polarisabilities from Deuteron Compton Scattering in \chiEFT

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dc.creatorGriesshammer, Harald W.
dc.date2007-10-15
dc.date.accessioned2026-07-07T11:53:35Z
dc.date.available2026-07-07T11:53:35Z
dc.descriptionChiral Effective Field Theory is for photon energies up to 200 MeV the tool to accurately determine the polarisabilities of the neutron from deuteron Compton scattering. A multipole analysis reveals that dispersive effects from an explicit Delta(1232) prove in particular indispensable to understand the data at 95 MeV measured at SAL. Simple power-counting arguments derived from nuclear phenomenology lead to the correct Thomson limit and gauge invariance. At next-to-leading order, the static scalar dipole polarisabilities are extracted as identical for proton and neutron within the error-bar of available data: α^n=11.6\pm1.5_stat\pm0.6_Baldin, β^n=3.6\mp1.5_stat\pm0.6_Baldin for the neutron, in units of 10^-4 fm^3, compared to α^p=11.0\pm1.4_stat\pm0.4_Baldin, β}^p=2.8\mp1.4_stat\pm0.4_Baldin for the proton in the same framework. New experiments e.g. at MAXlab (Lund) will improve the statistical error-bar.
dc.description10 pages LaTeX2e, including 7 figures in 16 .eps files embedded with includegraphicx. Uses MENU07macros (provided). Invited contribution to the 11th International Conference on Neson-Nucleon Physics and the Structure of the Nucleon MENU 2007, Juelich (Germany), 10th -- 14th September 2007. To be published in the electronic proceedings
dc.identifierhttps://arxiv.org/abs/0710.2924
dc.identifierhttp://arxiv.org/abs/0710.2924
dc.identifierECONFC070910:141,2007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204591
dc.subjectNuclear Theory
dc.titleNeutron Polarisabilities from Deuteron Compton Scattering in \chiEFT
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