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Precise extraction of the induced polarization in the 4He(e,e'p)3H reaction |
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| Authors: | Malace S P Paolone M Strauch S Albayrak I Arrington J Berman B L Brash E J Briscoe B Camsonne A Chen J-P Christy M E Chudakov E Cisbani E Craver B Cusanno F Ent R Garibaldi F Gilman R Glamazdin O Glister J Higinbotham D W Hyde-Wright C E Ilieva Y de Jager C W Jiang X Jones M K Keppel C E Khrosinkova E Kuchina E Kumbartzki G Lee B Lindgren R Margaziotis D J Meekins D Michaels R Park K Pentchev L Perdrisat C F Piasetzky E Punjabi V A Puckett A J R Qian X Qiang Y Ransome R D Saha A Sarty A J Schulte E Solvignon P Subedi R R Tang L Tedeschi D Tvaskis V Udias J M Ulmer P E Vignote J R |
| Institution: | University of South Carolina, Columbia, South Carolina 29208, USA. |
| Abstract: | We measured with unprecedented precision the induced polarization P(y) in (4)He(e,e'p)(3)H at Q(2)=0.8 and 1.3 (GeV/c)(2). The induced polarization is indicative of reaction-mechanism effects beyond the impulse approximation. Our results are in agreement with a relativistic distorted-wave impulse approximation calculation but are overestimated by a calculation with strong charge-exchange effects. Our data are used to constrain the strength of the spin-independent charge-exchange term in the latter calculation. |
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