Measurement of recoil proton polarizations in the electrodisintegration of deuterium by polarized electrons

• Published in: Physics letters. B 1999-12, Vol.470 (1), p.39-44
• Main Authors: Barkhuff, D.H., Armstrong, C.S., Bertozzi, W., Chen, J.P., Dale, D., Dodson, G., Dow, K.A., Epstein, M.B., Farkhondeh, M., Finn, J.M., Gilad, S., Jones, M.K., Joo, K., Kelly, J.J., Kowalski, S., Liu, D., Lourie, R.W., McIntyre, J.I., Madey, R., Margaziotis, D.J., Markowitz, P., Mertz, C., Milbrath, B.D., Mitchell, J., Mukhopadhyay, S., Perdrisat, C.F., Punjabi, V., Qin, L., Rutt, P.M., Sarty, A.J., Tieger, D., Tschalær, C., Turchinetz, W., Ulmer, P.E., Van Verst, S.P., Vellidis, C., Warren, G., Weinstein, L.B., Woo, R.J.
• Format: Article
• Language: English
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/S0370-2693(99)01294-0

In order to test modern theories of two-nucleon bound and scattering states, we have measured the spin polarization of ejectile protons in the electrodisintegration reaction d( e → ,e′ p → )n . Compared with spin-averaged observations, these observables offer the potential of enhanced sensitivity to details of the reaction process. The experiment was carried out in quasielastic kinematics ( q μq μ=−2m pω=−0.38 GeV 2/c 2). Protons were detected at two angles corresponding to neutron recoil momenta p r of 0 and 100 MeV/c. Full nonrelativistic calculations of the polarization transfer components s l and s t , including leading order relativistic contributions, describe our measurements well, but calculations of the induced polarization s n at p r =100 MeV/c underpredict the experimental result.