Measurement of the ¹H(γ, p)π0 Reaction Using a Novel Nucleon Spin Polarimeter.

Authors :: Sikora, M. H.
Watts, D. P.
Glazier, D. I.
Aguar-Bartolomé, P.
Akasoy, L. K.
Annand, J. R. M.
Arends, H. J.
Bantawa, K.
Beck, R.
Bekrenev, V. S.
Berghäuser, H.
Braghieri, A.
Branford, D.
Briscoe, W. J.
Brudvik, J.
Cherepnya, S.
Codling, R. F. B.
Demissie, B. T.
Downie, E. J.
Drexler, P.
Source :: Physical Review Letters. Jan2014, Vol. 112 Issue 2, p1-1. 1p.
Publication Year :: 2014
Abstract: We report the first large-acceptance measurement of polarization transfer from a polarized photon beam to a recoiling nucleon. The measurement pioneers a novel polarimetry technique, which can be applied to many other nuclear and hadron physics experiments. The commissioning reaction of ¹H(γ, p)π0 in the range 0.4 < Eγ < 1.4 GeV validates the technique and provides essential new data to constrain the excitation spectrum of the nucleon. [ABSTRACT FROM AUTHOR]