Measurement of Spin Correlation coefficients in \vec p \vec p --> d pi^+

Abstract

The spin correlation coefficent combinations A_{xx}+A_{yy} and A_{xx}-A_{yy}, the spin correlation coefficients A_{xz} and A_{zz}, and the analyzing power were measured for \vec p \vec p --> d pi^+ between center-of-mass angles 25 deg \leq θ\leq 65 deg at beam energies of 350.5, 375.0 and 400.0 MeV. The experiment was carried out with a polarized internal target and a stored, polarized beam. Non-vertical beam polarization needed for the measurement of A_{zz} was obtained by the use of solenoidal spin rotators. Near threshold, only a few partial waves contribute, and pion s- and p-waves dominate with a possible small admixture of d-waves. Certain combinations of the observables reported here are a direct measure of these d-waves. The d-wave contributions are found to be negligible even at 400.0 MeV.

6 pages, 1 figure

References in corpus (2)

• Measurement of Partial-Wave Contributions in pp --> pp pi^0
• Spin Correlation Coefficients in pp-->pnpi+ from 325 to 400 MeV

Cited by in corpus (10)

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• Differential Cross Sections Measurement for the $pp\to d{\pi }^{+}$ Reaction at 850 MeV/c
• Empirical Determination of Threshold Partial Wave Amplitudes in $pp\to pp\omega$
• Tensor polarization of $\omega$ produced at threshold in $p-p$ collisions
• Omega meson production in pp collisions with a polarized beam
• Final state polarization of protons in $pp\to pp\omega$
• Phase ambiguity of the threshold amplitude in pp -> ppπ^0