A measurement of z polarization in Z ° decays

O Adrlanla, M Agullar-Benltez b, S Ahlen c, H Akbarl d, j Alcaraz e, A AlolslO f, G Alverson g, M G Alvlggl f, G Ambrosl h, Q An ', H Anderhub J, A L Anderson k, V P Andreev e, T Angelov k, L Antonov m, D Antreasyan n, p Arce b, A Arefiev o, A Atamanchuk*, T Azemoon P, T Azlz q,r, p V K S Baba 1, p Bagnala s, j A Bakken t, L Baksay u R C BallP, S Banerjee q, J Bao d, R Barlll~re e, L Barone s, A Baschlrotto v, R Battlston h, A Bay w, F Becattml a, U Becker k°, F BehnerJ, J BehrensJ, S Belngessner x, G y L BenczeY, J Berdugo b, P Berges k, B Bertuccl h, B L Betev mJ, M BlaSlnl h, A Blland J, G M Bile1 h, R Blzzarrl s, j j BlalsmgX, B Blumenfeldd, G J Bobblnke'z, M Bocclohnla, R Bock r, A Bohm r, B Borgxa s, M Bosetl v, D Bourllkov aa, M Bourquln w, D Boutlgny x, B Bouwens z, E Bramblllaf, J G Branson ab, I C BrockaC, M Brooks ad, C Bulssonae, A BuJakaf, J n Burger k, W J Burger w, j p Burq ae, j Busemtz u, X D Cal~, M Capell ag, M Carla h, G Carllno f, F Carmmat l a, A M Cartaccl a, R Castello v, M Cerrada b, F Cesarom s, y H Chang k, U K Chaturvedl 1, M Chemarm ae, A Chen ah, C Chen al, G M Chen al, H F Chen aj, H S Chen al, j Chen k, M Chen k, M L Chen P, W Y Chen' , G Chlefarl f, C Y Chlen d, M Chmelssanl P, M T Cholak, S Chung k, C Clvmmnl a, I Clare k, R Clare k, T E Coan ad, H O Cohn ae, G Colgnet x, N Cohno e, A Contln n, F Chins aa, X T Cul 1, X Y Cul ~, T S Dal k, R D'Alessandro a, R de Asmundls f, A Degr6 x, K Deltersk, E D6nes Y, P Denest , F DeNotans tefanl s, M DhlnaJ, D D1Bltonto u, M Dlemoz s, H R Dlmlt rov m, C D1onlsl s,e, M T Dova 1, E Drago f, T Drlever aa, n Duchesneau w, p Dumker z, I Duran am, S Easo h, H E1 Mamounl ae, A Engler ac, F J Epphng k, F C Ern6 z, p Extermann w, R Fabbrettl an, M Fabre an, S Fa loano s, S J Fan ao, O Fackler ag, j Fayae, M Felclm e, T Ferguson ac, D Fernandez b, G Fernandez b, F Ferrom s, H Fesefeldt r, E Flandrmlh, j Field w, F Fdthaut aa, G Fmocchmro s, P H Fisher d, G Forcom w, T Foreman z, K FreudenrelchJ, W Frlebel ap, M Fukushlma k, M Gaflloud aq, Yu Galaktlonov °,k, E Gallo a, S N Ganguh q, P Garcla-Abla b, S S Gau ah, D Gele ae, S Gentile s,e, S Goldfarbg, Z F Gong aJ, E Gonzalez b, P Got thcher r, A Gougas d, D Goujon w, G Grat ta ar, C Grlnnell k, M Gruenewald ar, C Gu ~, M Guanzlroh ~, J K Guo ao, V K Guptat , A Gurtu e,q, H R Gustafson P, L J Gutay af, K Hangarter r, A Hasana, D Hauschfldt z, C F He ao, T Hebbeker r, M Hebert ab, G Herten k, U Herten r, A Herv6 e, K Hflgers r, H Hofer J, H Hooranl w, G Hu 1, G Q Hu a°, B Ille ae, M M Ilyasl, V Innocente e,f, H Janssen e, S Jezequel x, B N Jin a,, L W Jones P, A Kasser aq, R A Khan ~, Yu Kamyshkov ae, P Kaplnos *,ap, J S Kapustlnsky ad, Y Karyotakls e,x, M Kaur 1, S Khokhar l, M N Kmenzle-FocacclW, j K Kxm ak, S C Klm ak, y G Klm ak, W W Klnnlson ad, D Klrkby at, S Kitsch ap, W Klttel aa, A Khmentov k,°, A C Konlg aa, E Koffeman z, O Kornadt r, V Koutsenko k,o, A Koulbardls*, R W Kraemer ac, T Kramer k, V R Krastev m,h, W Krenz r, A Krlvshlch l, H Kuljten aa, K S Kumar as, A Kunln as,°, G Landl a, D Lanske r, S Lanzano f, P Lebrun ae, P LecomteJ, P Lecoq e, P Le CoultreJ, D M Lee ad, I Leedomg, J M Le Goff e, R Lelste ap, M Lent1 a, E Leonardl s, J LettryJ, X Leytens z, C L1 aJ,~, H T L1 al, P J L1 a°, X G L1 al, J Y Lmo a°, W T Lln ah, Z Y Lm aJ, F L Lmde e,z, B L m d e m a n n r, D LmnhoferJ, L Llsta f, Y Lm 1, W Lohmann ap,e, E Longo s,