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Afanasiev, S.; Arkhipov, V.; Bondarev, V.; Ehara, M.; Filipov, G.; Fukui, S.; Hasegawa, S.; Hasegawa, T.; Horikawa, N.; Isupov, A.; Iwata, T.; Kashirin, V.; Kawano, M.; Kageya, T.; Khrenov, A.; Kolesnikov, V.; Ladygin, V.; Litvinenko, A.; Malakhov, A.; Matsuda, T.; Nakayama, H.; Nikiforov, A.; Osada, E.; Pilipenko, Yu; Reznikov, S.; Rukoyatkin, P.; Semenov, A.; Semenova, I.; Takabayashi, N.; Wakai, A.; Zolin, L.
Physics letters. B, 12/1998, Letnik: 445, Številka: 1Journal Article
The tensor analyzing power T 20 of the reaction d+A→π −(0°)+X has been measured in the fragmentation of 9 GeV tensor polarized deuterons into pions with momenta from 3.5 to 5.3 GeV/c on hydrogen, beryllium and carbon targets. This kinematic range corresponds to the region of cumulative hadron production with the cumulative variable x c from 1.08 to 1.76. The values of T 20 have been found to be small and consistent with positive values. This contradicts the predictions based on a direct mechanism assuming NN collision between a high momentum nucleon in the deuteron and a target nucleon ( NN→ NNπ).
