Extracting the spin polarizabilities of the proton by measurement of Compton double-polarization observables
- Paudyal, D.
- Martel, P. P.
- Huber, G. M.
- Hornidge, D.
- Abt, S.
- Achenbach, P.
- Adlarson, P.
- Afzal, F.
- Ahmed, Z.
- Akondi, C. S.
- Annand, J.R.M.
- Arends, H. J.
- Bashkanov, M.
- Beck, R.
- Biroth, M.
- Borisov, N. S.
- Braghieri, A.
- Briscoe, W. J.
- Cividini, F.
- Costanza, S.
- Collicott, C.
- Denig, A.
- Dieterle, M.
- Downie, E. J.
- Drexler, P.
- Ferretti-Bondy, M. I.
- Gardner, S.
- Garni, S.
- Glazier, D.I.
- Glowa, D.
- Gorodnov, I.
- Gradl, W.
- Günther, S.
- Gurevich, G. M.
- Hamilton, D.
- Heijkenskjöld, L.
- Käser, A.
- Kashevarov, V. L.
- Kay, S.
- Keshelashvili, I.
- Kondratiev, R.
- Korolija, M.
- Krusche, B.
- Lazarev, A. B.
- Linturi, J. M.
- Lisin, V.
- Livingston, K.
- Lutterer, S.
- MacGregor, I.J.D.
- Macrae, R.
- Mancell, J.
- Manley, D. M.
- Metag, V.
- Meyer, W.
- Miskimen, R.
- Mornacchi, E.
- Mullen, C.
- Mushkarenkov, A.
- Neganov, A. B.
- Neiser, A.
- Oberle, M.
- Ostrick, M.
- Otte, P. B.
- Pedroni, P.
- Polonski, A.
- Powell, A.
- Prakhov, S. N.
- Rajabi, A.
- Reicherz, G.
- Ron, G.
- Rostomyan, T.
- Sarty, A.
- Sfienti, C.
- Sikora, M. H.
- Sokhoyan, V.
- Spieker, K.
- Steffen, O.
- Strakovsky, I. I.
- Strub, Th.
- Supek, I.
- Thiel, A.
- Thiel, M.
- Thomas, A.
- Unverzagt, M.
- Usov, Yu. A.
- Wagner, S.
- Walford, N. K.
- Watts, D. P.
- Werthmüller, D.
- Wettig, J.
- Witthauer, L.
- Wolfes, M.
- Zana, L.
DOIAbstract
The Compton double-polarization observable Σ 2 z has been measured for the first time in the Δ ( 1232 ) resonance region using a circularly polarized photon beam incident on a longitudinally polarized proton target at the Mainz Microtron. This paper reports these results, together with the model-dependent extraction of four proton spin polarizabilities from fits to additional asymmetry data using either a dispersion relation calculation or a baryon chiral perturbation theory calculations with the weighted average of these two fits resulting in γ E 1 E 1 = − 2.87 ± 0.52 , γ M 1 M 1 = 2.70 ± 0.43 , γ E 1 M 2 = − 0.85 ± 0.72 , and γ M 1 E 2 = 2.04 ± 0.43 , in units of 10 − 4 f...
Add to ORKG