Neutron polarizabilities investigated by quasifree Compton scattering from the deuteron

ISSN
0031-9007
Date Issued
2002
Author(s)
Kossert, K.
Camen, M.
Wissmann, F.
Ahrens, J.
Annand, JRM
Arends, H. J.
Beck, R.
Caselotti, G.
Grabmayr, P.
Jennewein, P.
Levchuk, M. I.
L'vov, A. I.
McGeorge, J. C.
Natter, A.
de Leon, V. O.
Petrun'kin, V. A.
Rosner, G.
Schumacher, M.
Seitz, Bjoern
Smend, F.
Thomas, Andy
Weihofen, W.
Zapadtka, F.
DOI
10.1103/PhysRevLett.88.162301
Abstract
Measuring Compton scattered photons and recoil neutrons in coincidence, quasifree Compton scattering by the neutron has been investigated at MAMI (Mainz) at theta(gamma)(lab) = 136degrees in an energy range from 200 to 400 MeV. From the data a polarizability difference of alpha(n) - beta(n) = 9.8 +/- 3.6(stat)(-1.1)(+2.1)(syst) +/- 2.2(model) in units of 10(-4) fm(3) has been determined. In combination with the polarizability sum alpha(n) + beta(n) = 15.2 +/- 0.5 deduced from photoabsorption data, the first precise results for the neutron electric and magnetic polarizabilities, alpha(n) = 12.5 +/- 1.8(stat)(-0.6)(+1.1)(syst) +/- 1.1(model) and beta(n) = 2.7 -/+ 1.8(stat)(-1.1)(+0.6)(syst) -/+ 1.1(model) , are obtained.