A precise extraction of the induced polarization in the 4He(e,e'p)3H reaction

Details A precise extraction of the induced polarization in the 4He(e,e'p)3H reaction A precise extraction of the induced polarization in the 4He(e,e'p)3H reaction

2010-11-19

arxiv.org/abs/1011.4483v2

Phys.Rev.Lett.106:052501,2011

Physics

Nuclear Physics

Nuclear Experiment

submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.106.052501

We measured with unprecedented precision the induced polarization Py in 4He(e,e'p)3H at Q^2 = 0.8 (GeV/c)^2 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 over-estimated 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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