Abstract
On the basis of T invariance, it is established that the dependence of the effective cross section for a binary reaction of the a+b → c+d type on the polarization vectors of primary particles a and b determines completely the polarization vectors and spin correlations for the same particles in the inverse reaction c+d → a+b induced by collisions between unpolarized primary particles c and d. By using the formalism of helicity amplitudes, polarization effects are studied in the process p+3He → π++4He and in the inverse process π++4He → p+3He. It is shown that, in the reaction π++4He → p+3He, the spins of the final-state particles (proton and 3He nucleus) are strongly correlated. An expression for the correlation tensor is obtained for arbitrary values of the (p, 3He) emission angle.
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Translated from Yadernaya Fizika, Vol. 63, No. 5, 2000, pp. 837–843.
Original Russian Text Copyright © 2000 by V. V. Lyuboshitz, V. L. Lyuboshitz.
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Lyuboshitz, V.V., Lyuboshitz, V.L. T invariance and polarization effects in the reactions p+3He → π++4He and π++4He → p+3He. Phys. Atom. Nuclei 63, 767–773 (2000). https://doi.org/10.1134/1.855705
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DOI: https://doi.org/10.1134/1.855705