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Polarization measurement of antiproton scattered elastically from proton at 220 MeV

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Il Nuovo Cimento A (1965-1970)

Summary

The polarization of scattered antiproton in\(\bar pp\) elastic scattering has been measured at the kinetic energy of 220MeV by means of double scattering in a bubble chamber. The polarizations obtained are 0.28±0.11, 0.46±0.12, 0.51±0.19 and 0.38±0.31 at the scattering angles 28°, 42°, 56° and 73° in the c.m. system, respectively. These results do not seem to be in good agreement with a prediction given by Bryan and Phillips. We have also compared these data with a modified diffraction model.

Riassunto

Si è misurata la polarizzazione dell'antiprotone diffuso nello scattering elastico\(\bar pp\) alla energia cinetica di 220 MeV, per mezzo del doppio scattering in una camera a bolle. Le polarizzazioni ottenute risultano pari a 0.28±0.11, 0.46±0.12, 0.51±0.19 e 0.38±0.31 in corrispondenza rispettivamente degli angoli di scattering di 28°, 42°, 56° e 73° nel sistema del c.m. Non sembra che questi risultati siano in buon accordo con quelli previsti da Bryan e Phillips. Si confrontano inoltre questi dati con un modello diffrattivo modificato.

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Ohsugi, T., Fujisaki, M., Kaneko, S. et al. Polarization measurement of antiproton scattered elastically from proton at 220 MeV. Nuov Cim A 17, 456–463 (1973). https://doi.org/10.1007/BF02787753

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