Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 2: Hadronenstruktur und -spektroskopie

HK 2.2: Vortrag

Montag, 19. März 2012, 14:30–14:45, RW 2

Measurement of the spin correlation coefficients A_x,x and A_y,y in the pn→ {pp}_s π⁻ reaction near the threshold at ANKE-COSY. — •Vera Shmakova — Institut für Kernphysik, Forschungszentrum Jülich, 52425 Jülich, Germany — DLNP, JINR, Joliot-Curie 6, 141980 Dubna, Moscow region, Russia

A kinematically complete double polarization measurement of the pn→ {pp}_s π⁻ process near the threshold has been performed recently at the ANKE-COSY spectrometer (Jülich). The experiment aimed to determine the spin correlation coefficients A_x,x and A_y,y in this process. These results will fascilitate further development of χ PT in this sector.

The transversely vector polarized deuteron beam and the hydrogen internal polarized ANKE target were used in the experiment. The pd→ dπ⁰ process data were recorded concurrently and used for beam and target polarimetry. The first results of the data analysis will be presented.

Supported by the COSY-FFE program.