YN scattering data: KO00

Authors:	Y. Kondo, J.K. Ahn, H. Akikawa, J. Arvieux, B. Bassalleck, M.S. Chung, H. En'yo, T. Fukuda, H. Funahashi, S.V. Golovkin, A.M. Gorin, Y. Goto, M. Hanabata, T. Hayakawa, A. Ichikawa, M. Ieiri, K. Imai, M. Ishino, H. Kanda, Y.D. Kim, E.N. Kozarenko, I.E. Kreslo, J.M. Lee, A. Masaike, S. Mihara, K. Nakai, K. Nakazawa, K. Ozawa, A. Sato, H.D. Sato, K.S. Sim, T. Tabaru, F. Takeutchi, P. Tlustý, H. Torii, K. Yamamoto, S. Yokkaichi, M. Yoshida, M. Yoshida
Reference:	Nucl. Phys. A676 (2000), 371-387
Group:	KEK-PS E289 collaboration

The experiment:

A 1.39 GeV/c π^- beam at the 12 GeV Proton Synchroton at KEK was used to produce Σ^- particles through the (π^-,K⁺) reaction in the scintillating fiber (SCIFI) target. The tracks left by scattering Σ⁺ in the SCIFI target produced visual image data which were analyzed using an automatic track recognition program. After analyzing, of the remaining candidate events 30 Σ^- p scattering events were selected by eye-scanning.

The data:

Σ^- p → Σ^- p	differential cross section (DSG)
	based on 30 events in the range 400 - 700 MeV/c cos(theta) DSG [mb] -0.5 - -0.2 0.3 +1.8 -0.7 (stat.) +/- 0.1 (syst.) -0.2 - 0.1 3.0 +1.5 -1.1 (stat.) +/- 0.3 (syst.) 0.1 - 0.4 3.4 +1.5 -1.1 (stat.) +/- 0.3 (syst.) 0.4 - 0.7 3.7 +1.9 -1.4 (stat.) +/- 0.3 (syst.)

Σ^- p → Σ^- p

differential cross section (DSG)

based on 30 events in the range 400 - 700 MeV/c

   cos(theta)        DSG [mb]

 -0.5 -  -0.2     0.3   +1.8 -0.7 (stat.)  +/- 0.1 (syst.)
 -0.2 -   0.1     3.0   +1.5 -1.1 (stat.)  +/- 0.3 (syst.)
  0.1 -   0.4     3.4   +1.5 -1.1 (stat.)  +/- 0.3 (syst.)
  0.4 -   0.7     3.7   +1.9 -1.4 (stat.)  +/- 0.3 (syst.)

Notes:

For three momentum regions the integrated cross sections for the angular region studied is also given in the text.