Measurement of the $overlineLambda$ polarization in $u_mu$ charged current interactions in the NOMAD experiment

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

Nuclear Physics(2001)

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摘要
We present a measurement of the polarization of $\alam$ hyperons produced in $\nu_\mu$ charged current interactions. The full data sample from the NOMAD experiment has been analyzed using the same $\vo$ identification procedure and analysis method reported in a previous paper~\cite{NOMAD-polar} for the case of $\lam$ hyperons. The $\alam$ polarization has been measured for the first time in a neutrino experiment. The polarization vector is found to be compatible with zero.
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