Measurement of the $\overlineΛ$ polarization in $ν_μ$ charged current interactions in the NOMAD experiment

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

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Measurement of the $\overlineΛ$ polarization in $ν_μ$ charged current interactions in the NOMAD experiment

Journal article published in 2001 by 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 and other authors.

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Abstract

We present a measurement of the polarization of $\alam$ hyperons produced in $ν_μ$ 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.