Physical Review Letters
We measured with unprecedented precision the induced polarization P-y in He-4(e, e(l)(p) over right arrow)H-3 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.
Malace, S. P., Paolone, M., Strauch, S., Albayrak, I., Arrington, J., Berman, B. L., ... & Christy, M. E. (2011). Precise Extraction of the Induced Polarization in the He 4 (e, e′ p→) H 3 Reaction. Physical review letters, 106(5), 052501.