Measurement of the longitudinal spin transfer to Λ and barΛ hyperons in polarised muon DIS

Journal Article (Journal Article)

The longitudinal polarisation transfer from muons to Λ and \bar\Λ hyperons, DLLΛ(barΛ),has been studied in deep-inelastic scattering off an unpolarised isoscalar target at the COMPASS experiment at CERN. The spin transfers to Λ and barΛ produced in the current fragmentation region exhibit different behaviours as a function of x and x F. The measured x and x F dependences of D LLΛ are compatible with zero, while D LLbarΛ tends to increase with x F, reaching values of 0.4-0.5. The resulting average values are D LLΛ = -0.012±0.047±0.024 and DLLbarΛ = 0.249±0.056±0.049. These results are discussed in the frame of recent model calculations. © 2009 Springer-Verlag / Società Italiana di Fisica.

Full Text

Duke Authors

Cited Authors

  • Alekseev, M; Alexakhin, VY; Alexandrov, Y; Alexeev, GD; Amoroso, A; Austregesilo, A; Badełek, B; Balestra, F; Ball, J; Barth, J; Baum, G; Bedfer, Y; Bernhard, J; Bertini, R; Bettinelli, M; Birsa, R; Bisplinghoff, J; Bordalo, P; Bradamante, F; Bravar, A; Bressan, A; Brona, G; Burtin, E; Bussa, MP; Chapiro, A; Chiosso, M; Chung, SU; Cicuttin, A; Colantoni, M; Crespo, ML; Dalla Torre, S; Dafni, T; Das, S; Dasgupta, SS; Denisov, OY; Dhara, L; Diaz, V; Dinkelbach, AM; Donskov, SV; Doshita, N; Duic, V; Dünnweber, W; Efremov, A; Eversheim, PD; Eyrich, W; Faessler, M; Ferrero, A; Finger, M; Fischer, H; Franco, C; Friedrich, JM; Garfagnini, R; Gautheron, F; Gavrichtchouk, OP; Gazda, R; Gerassimov, S; Geyer, R; Giorgi, M; Gobbo, B; Goertz, S; Grabmüller, S; Grajek, OA; Grasso, A; Grube, B; Gushterski, R; Guskov, A; Haas, F; Von Harrach, D; Hasegawa, T; Heckmann, J; Heinsius, FH; Hermann, M; Hermann, R; Herrmann, F; He, C; Hinterberger, F; Horikawa, N; Höppner, C; D'Hose, N; Ilgner, C; Ishimoto, S; Ivanov, O; Ivanshin, Y; Iven, B; Iwata, T; Jahn, R; Jasinski, P; Jegou, G; Joosten, R; Kabu, E; Kang, D; Ketzer, B; Khaustov, GV; Khokhlov, YA; Kisselev, Y; Klein, F; Klimaszewski, K; Koblitz, S; Koivuniemi, JH

Published Date

  • January 1, 2009

Published In

Volume / Issue

  • 64 / 2

Start / End Page

  • 171 - 179

Electronic International Standard Serial Number (EISSN)

  • 1434-6052

International Standard Serial Number (ISSN)

  • 1434-6044

Digital Object Identifier (DOI)

  • 10.1140/epjc/s10052-009-1143-7

Citation Source

  • Scopus