Production asymmetry measurement of high xT hadrons in p ↑ p collisions at 40 GeV

• Published in: Nuclear physics. B Vol. 492; no. 1; pp. 3 - 17
• Main Authors: Abramov, V.V., Dyshkant, A.S., Evdokimov, V.N., Goncharov, P.I., Gorin, A.M., Gurzhiev, A.N., Korneev, Yu.P., Kostritskii, A.V., Krinitsyn, A.N., Kryshkin, V.I., Mel'nik, Yu.M., Podstavkov, V.M., Sin'kin, N.I., Tereshenko, S.I., Turchanovich, L.K., Yakutin, A.E., Zaitchenko, A.A., Zapol'sky, V.N.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 12.05.1997
• Subjects: Asymmetry; Inclusive reaction; Polarization; QCD; Spin; Polarization; QCD; 13.85.Ni; Asymmetry; Spin; 13.88.+e; 12.38.Qk; Inclusive reaction
• ISSN: 0550-3213; 1873-1562
• DOI: 10.1016/S0550-3213(97)80025-9

Single-spin asymmetries for hadrons have been measured in collisions of a transversely polarized 40 GeV/ c proton beam with an unpolarized liquid hydrogen target. The asymmetries were measured for π ±, K ±, protons and antiprotons, produced in the central region (0.02 ⩽ x F ⩽ 0.10 and 0.7 ⩽ p T ⩽ 3.4 GeV/ c). Asymmetries for π ±, K ± and p̄ show, within measurement errors, a linear dependence on x T and change sign near 0.37. For protons, a negative asymmetry, independent of x T , has been found. The results are compared with those of other experiments and SU(6) model predictions.