Polarization transfer in theH2(e→,e′p→)nreaction up toQ2=1.61(GeV/c)2
| Autor: | G. J. Kumbartzki, John C. Mitchell, J. J. LeRose, K. Wijesooriya, M. K. Jones, S. Dumalski, V. Gorbenko, D. Rowntree, C. E. Keppel, R. Michaels, X. Jiang, Andreas Klein, J. Hovebo, Oliver Keith Baker, M. Kuss, C. Glashausser, J. R. Calarco, L. Todor, J. A. Gomez, E. J. Brash, Larry Weinstein, William Bertozzi, F. Garibaldi, Nilanga Liyanage, Ronald Gilman, Pete Markowitz, G. J. Lolos, R. J. Woo, C. F. Perdrisat, J.-O. Hansen, Z. Papandreou, Bogdan Wojtsekhowski, R. Roche, M. Liang, Hartmuth Arenhövel, P. E. Ulmer, Rolf Ent, A. Kozlov, J. P. Chen, S. Strauch, G. M. Urciuoli, A. Cochran, S. Kuhn, Shalev Gilad, E. Chudakov, John M. Finn, C. W. de Jager, A. Saha, B. Hu, V. A. Punjabi, D. G. Meekins, S. Jeschonnek |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Physical Review C. 73 |
| ISSN: | 1089-490X 0556-2813 |
| Popis: | The recoil proton polarization was measured in the {sup 2}H(e-vector,e{sup '}p-vector)n reaction in Hall A of the Thomas Jefferson National Accelerator Facility. The electron kinematics were centered on the quasielastic peak (x{sub Bj}{approx_equal}1) and included three values of the squared four-momentum transfer, Q{sup 2}=0.43,1.00 and 1.61 (GeV/c){sup 2}. For Q{sup 2}=0.43 and 1.61 (GeV/c){sup 2}, the missing momentum, p{sub m}, was centered at zero, whereas for Q{sup 2}=1.00 (GeV/c){sup 2} two values of p{sub m} were chosen: 0 and 174 MeV/c. At low p{sub m}, the Q{sup 2} dependence of the longitudinal polarization, P{sub z}{sup '}, is not well described by a state-of-the-art calculation. Further, at higher p{sub m}, a 3.5{sigma} discrepancy was observed in the transverse polarization, P{sub x}{sup '}. Understanding the origin of these discrepancies is important to confidently extract the neutron electric form factor from the analogous {sup 2}H(e-vector,e{sup '}n-vector)p experiment. |
| Databáze: | OpenAIRE |
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