학술논문
A measurement of the transverse polarization of Λ-hyperons produced in inelastic pN-reactions at 450 GeV proton energy
Document Type
article
Author
Fanti, V; Lai, A; Musa, L; Nappi, A; Setzu, MG; Moore, RW; Munday, DJ; Parker, MA; Takach, SF; White, TO; Barr, G; Bocquet, G; Bremer, J; Ceccucci, A; Cogan, J; Cundy, D; Doble, N; Fischer, G; Funk, W; Gatignon, L; Gianoli, A; Gonidec, A; Grafström, P; Kubischta, W; Marzulli, V; Kesseler, G; Matheys, JP; Norton, A; Palestini, S; Panzer-Steindel, B; Schinzel, D; Taureg, H; Velasco, M; Vossnack, O; Wahl, H; Kekelidze, V; Kojevnikov, I; Potrebenikov, Y; Hristov, P; Tatishvili, G; Tkatchev, A; Bertolotto, L; Boyle, O; Hay, B; McKay, NE; Oakland, G; Parsons, H; Peach, KJ; Talamonti, C; Walker, A; Dalpiaz, P; Duclos, J; Formica, A; Frabetti, PL; Martini, M; Petrucci, F; Porcu, M; Rossi, F; Savrie, M; Simani, C; Bizzeti, A; Calvetti, M; Lenti, M; Michetti, A; Becker, HG; Beier, T; Blümer, H; Buchholz, P; Coward, D; Ebersberger, C; Kalter, A; Kleinknecht, K; Koch, U; Köpke, L; Leber, F; Luitz, S; Renk, B; Scheidt, J; Schmidt, J; Schönharting, V; Wilhelm, R; Zeitnitz, O; Chollet, JC; Crépé, S; Fayard, L; Iconomidou-Fayard, L; Ocariz, J; Unal, G; Anzivino, G; Cenci, P; Lubrano, P; Pepe, M; Calafiura, P; Carosi, R; Casali, R; Cerri, C; Costantini, F; Fantechi, R; Giudici, S; Gorini, B
Source
European Physical Journal C. 6(2)
Subject
Language
Abstract
A study of the polarization of Λ hyperons produced in inelastic pN reactions induced by the 450 GeV proton beam from the CERN SPS has been performed with the NA48 detector. The Λ hyperons were detected at a fixed angle of 4.2 mrad in the momentum range from 50 GeV/c to 200 GeV/c. The polarization changes from -0.053 ± 0.034 to -0.298 ± 0.074 for a transverse momentum range of the Λ between 0.28 GeV/c and 0.86 GeV/c. The Λ̄ polarization is consistent with zero.