Precise Extraction of the Induced Polarization in the He-4(e,e(l)(p)over-right-arrow)H-3 Reaction

S. P. Malace
M. Paolone
S. Strauch
L. Pentchev, William & Mary
C. F. Perdrisat, William & Mary

Abstract

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.