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Measurement of the polarization parameter in $\pi^{+}p$ backward elastic scattering at 6 GeV/c

The polarization parameter in pi /sup +/p backward elastic scattering at 6 GeV/c incident pion momentum has been measured using a butanol polarized proton target, a high intensity pion beam, and a scintillation hodoscope detection system. Details of the apparatus and data analysis are presented here...

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Detalles Bibliográficos
Autores principales: Dick, Louis, Äoi, H, Aschman, D G, Booth, N E, Caverzasio, C, Gonidec, A, Green, K, Janout, Z, Kuroda, K, Michalowicz, A, Poulet, M, Sillou, D, Spencer, C M
Lenguaje:eng
Publicado: 1972
Materias:
Acceso en línea:https://dx.doi.org/10.1016/0550-3213(72)90035-1
http://cds.cern.ch/record/875707
Descripción
Sumario:The polarization parameter in pi /sup +/p backward elastic scattering at 6 GeV/c incident pion momentum has been measured using a butanol polarized proton target, a high intensity pion beam, and a scintillation hodoscope detection system. Details of the apparatus and data analysis are presented here, together with the final results. The polarization appears to be very nearly zero for small u-values, but becomes large and negative for u-values beyond the dip in the pi /sup +/p cross section at u=-0.15 (GeV/c)/sup 2/. The data are not well predicted by any of the current Regge-exchange models. (20 refs).