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Neutron polarizabilities investigated by quasi-free Compton scattering from the deuteron

K. Kossert·M. Camen·F. Wissmann·J. Ahrens·H. -J. Arends·R. Beck·G. Caselotti·P. Grabmayr·P. D. Harty·O. Jahn·P. Jennewein·M. I. Levchuk·A. I. L'vov·J. C. McGeorge·A. Natter·V. Olmos de Leon·V. A. Petrun'kin·M. Schumacher·B. Seitz·F. Smend·A. Thomas·W. Weihofen·F. Zapadtka
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Abstract

Measuring Compton scattered photons and recoil neutrons in coincidence, quasi-free Compton scattering by the neutron has been investigated at MAMI (Mainz) at $theta^{lab}_γ=136^o$ in an energy range from 200 to 400 MeV. From the data a polarizability difference of $α_n - β_n = 9.8 \pm 3.6(stat)^{+2.1}_{-1.1}(syst)\pm 2.2(model)$ in units of $10^{-4}fm^3$ has been determined. In combination with the polarizability sum $α_n+β_n= 15.2\pm 0.5$ deduced from photo absorption data, the neutron electric and magnetic polarizabilities, $α_n=12.5\pm 1.8(stat)^{+1.1}_{-0.6}(syst)\pm 1.1(model)$ and $β_n = 2.7\mp 1.8(stat)^{+0.6}_{-1.1}(syst)\mp 1.1(model)$, are obtained.

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K. Kossert, M. Camen, F. Wissmann, J. Ahrens, H. -J. Arends, R. Beck, G. Caselotti, P. Grabmayr, P. D. Harty, O. Jahn, P. Jennewein, M. I. Levchuk, A. I. L'vov, J. C. McGeorge, A. Natter, V. Olmos de Leon, V. A. Petrun'kin, M. Schumacher, B. Seitz, F. Smend, A. Thomas, W. Weihofen, F. Zapadtka. 2002-02-27. Neutron polarizabilities investigated by quasi-free Compton scattering from the deuteron. https://doi.org/10.1103/physrevlett.88.162301

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