Measurement of the anti-Λ polarization in νμ charged current interactions in the NOMAD experiment

Astier, P; Autiero, D; Baldisseri, A; Baldo Ceolin, M; Banner, M; Bassompierre, G; Besson, N; Bird, I; Blumenfeld, B; Bobisut, F; Bouchez, J; Boyd, S; Bueno, A; Bunyatov, S; Camilleri, L; Cardini, A; Cattaneo, Pw; Cavasinni, V; Cervera Villanueva, A; Chukanov, A; Collazuol, G; Conforto, G; Conta, C; Contalbrigo, M; Cousins, R; Daniels, D; Degaudenzi, H; Del Prete, T; De Santo, A; Dignan, T; Di Lella, L; Ede, Silva; Dumarchez, J; Ellis, M; Fazio, T; Feldman, Gj; Ferrari, R; Ferrere, D; Flaminio, V; Fraternali, M; Gaillard, Jm; Gangler, E; Geiser, A; Geppert, D; Gibin, D; Gninenko, S; Godley, A; Gomez Cadenas JJ,; Gosset, J; Gossling, C; Gouanere, M; Grant, A; Graziani, G; Guglielmi, A; Hagner, C; Hernando, J; Hubbard, D; Hurst, P; Hyett, N; Iacopini, E; Joseph, C; Juget, F; Kirsanov, M; Klimov, O; Kokkonen, J; Kovzelev, A; Krasnoperov, A; Kustov, D; Kuznetsov, V; Lacaprara, S; Lachaud, C; Lakic, B; Lanza, A; La Rotonda, L; Laveder, M; Letessier Selvon, A; Levy, Jm; Linssen, L; Ljubicic, A; Long, J; Lupi, A; Marchionni, A; Martelli, Filippo; Mechain, X; Mendiburu, Jp; Meyer, Jp; Mezzetto, M; Mishra, Sr; Moorhead, Gf; Naumov, D; Nedelec, P; Nefedov, Y; Nguyen Mau, C; Orestano, D; Pastore, F; Peak, Ls; Pennacchio, E; Pessard, H; Petti, R; Placci, A; Polesello, G; Pollmann, D; Polyarush, A; Popov, B; Poulsen, C; Rico, J; Riemann, P; Roda, C; Rubbia, A; Salvatore, F; Schahmaneche, K; Schmidt, B; Schmidt, T; Sevior, M; Sillou, D; Fjp, Soler; Sozzi, G; Steele, D; Stiegler, U; Stipcevic, M; Stolarczyk, T; Tareb Reyes, M; Taylor, Gn; Tereshchenko, V; Toropin, A; Touchard, Am; Tovey, Sn; Tran, Mt; Tsesmelis, E; Ulrichs, J; Vacavant, L; Valdata Nappi, M; Valuev, V; Vannucci, F; Varvell, Ke; Veltri, Michele; Vercesi, V; Vidal Sitjes, G; Vieira, Jm; Vinogradova, T; Weber, Fv; Weisse, T; Wilson, Ff; Winton, Lj; Yabsley, Bd; Zaccone, H; Zuber, K; Zuccon, P.

doi:10.1016/S0550-3213(01)00181-X

We present a measurement of the polarization of <()over bar> hyperons produced in nu (mu) charged current interactions. The full data sample from the NOMAD experiment has been analyzed using the same V-0 identification procedure and analysis method reported in a previous paper [NOMAD Collaboration. Nucl. Phys. B 588 (2000) 3] for the case of Lambda hyperons. The <()over bar> polarization has been measured for the first time in a neutrino experiment. The polarization vector is found to be compatible with zero.