Affolder T, Akimoto H, Akopian A, Albrow M G, Amaral P, Amendolia S R, Amidei D, Anikeev K, Antos J, Apollinari G, Arisawa T, Asakawa T, Ashmanskas W, Atac M, Azfar F, Azzi-Bacchetta P, Bacchetta N, Bailey M W, Bailey S, de Barbaro P, Barbaro-Galtieri A, Barnes V E, Barnett B A, Barone M, Bauer G, Bedeschi F, Belforte S, Bellettini G, Bellinger J, Benjamin D, Bensinger J, Beretvas A, Berge J P, Berryhill J, Bevensee B, Bhatti A, Binkley M, Bisello D, Blair R E, Blocker C, Bloom K, Blumenfeld B, Blusk S R, Bocci A, Bodek A, Bokhari W, Bolla G, Bonushkin Y, Bortoletto D, Boudreau J, Brandl A, van den Brink S, Bromberg C, Brozovic M, Bruner N, Buckley-Geer E, Budagov J, Budd H S, Burkett K, Busetto G, Byon-Wagner A, Byrum K L, Calafiura P, Campbell M, Carithers W, Carlson J, Carlsmith D, Cassada J, Castro A, Cauz D, Cerri A, Chan A W, Chang P S, Chang P T, Chapman J, Chen C, Chen Y C, Cheng M T, Chertok M, Chiarelli G, Chirikov-Zorin I, Chlachidze G, Chlebana F, Christofek L, Chu M L, Ciobanu C I, Clark A G, Connolly A, Conway J, Cooper J, Cordelli M, Cranshaw J, Cronin-Hennessy D, Cropp R, Culbertson R, Dagenhart D, DeJongh F, Dell'Agnello S, Dell'Orso M, Demina R, Demortier L, Deninno M, Derwent P F, Devlin T, Dittmann J R, Donati S, Done J, Dorigo T, Eddy N, Einsweiler K, Elias J E, Engels E, Erdmann W, Errede D, Errede S, Fan Q, Feild R G, Ferretti C, Field R D, Fiori I, Flaugher B, Foster G W, Franklin M, Freeman J, Friedman J, Fukui Y, Furic I, Galeotti S, Gallinaro M, Gao T, Garcia-Sciveres M, Garfinkel A F, Gatti P, Gay C, Geer S, Gerdes D W, Giannetti P, Giromini P, Glagolev V, Gold M, Goldstein J, Gordon A, Goshaw A T, Gotra Y, Goulianos K, Green C, Groer L, Grosso-Pilcher C, Guenther M, Guillian G, Guimaraes da Costa J, Guo R S, Haas R M, Haber C, Hafen E, Hahn S R, Hall C, Handa T, Handler R, Hao W, Happacher F, Hara K, Hardman A D, Harris R M, Hartmann F, Hatakeyama K, Hauser J, Heinrich J, Heiss A, Herndon M, Hinrichsen B, Hoffman K D, Holck C, Hollebeek R, Holloway L, Hughes R, Huston J, Huth J, Ikeda H, Incandela J, Introzzi G, Iwai J, Iwata Y, James E, Jensen H, Jones M, Joshi U, Kambara H, Kamon T, Kaneko T, Karr K, Kasha H, Kato Y, Keaffaber T A, Kelley K, Kelly M, Kennedy R D, Kephart R, Khazins D, Kikuchi T, Kilminster B, Kirby M, Kirk M, Kim B J, Kim D H, Kim H S, Kim M J, Kim S H, Kim Y K, Kirsch L, Klimenko S, Koehn P, Köngeter A, Kondo K, Konigsberg J, Kordas K, Korn A, Korytov A, Kovacs E, Kroll J, Kruse M, Kuhlmann S E, Kurino K, Kuwabara T, Laasanen A T, Lai N, Lami S, Lammel S, Lamoureux J I, Lancaster M, Latino G, LeCompte T, Lee A M, Lee K, Leone S, Lewis J D, Lindgren M, Liss T M, Liu J B, Liu Y C, Lockyer N, Loken J, Loreti M, Lucchesi D, Lukens P, Lusin S, Lyons L, LysV J, Madrak R, Maeshima K, Maksimovic P, Malferrari L, Mangano M, Mariotti M, Martignon G, Martin A, Matthews J A, Mayer J, Mazzanti P, McFarland K S, McIntyre P, McKigney E, Menguzzato M, Menzione A, Mesropian C, Miao T, Miller R, Miller J S, Minato H, Miscetti S, Mishina M, Mitselmakher G, Moggi N, Moore E, Moore R, Morita Y, Mulhearn M, Mukherjee A, Muller T, Munar A, Murat P, Murgia S, Musy M, Nachtman J, Nahn S, Nakada H, Nakaya T, Nakano I, Nelson C, Neuberger D, Newman-Holmes C, Ngan C Y, Nicolaidi P, Niu H, Nodulman L, Nomerotski A, Oh S H, Ohmoto T, Ohsugi T, Oishi R, Okusawa T, Olsen J, Orejudos W, Pagliarone C, Palmonari F, Paoletti R, Papadimitriou V, Pappas S P, Partos D, Patrick J, Pauletta G, Paulini M, Paus C, Pescara L, Phillips T J, Piacentino G, Pitts K T, Plunkett R, Pompos A, Pondrom L, Pope G, Popovic M, Prokoshin F, Proudfoot J, Ptohos F, Pukhov O, Punzi G, Ragan K, Rakitine A, Reher D, Reichold A, Riegler W, Ribon A, Rimondi F, Ristori L, Robertson W J, Robinson A, Rodrigo T, Rolli S, Rosenson L, Roser R, Rossin R, Safonov A, Sakumoto W K, Saltzberg D, Sansoni A, Santi L, Sato H, Savard P, Schlabach P, Schmidt E E, Schmidt M P, Schmitt M, Scodellaro L, Scott A, Scribano A, Segler S, Seidel S, Seiya Y, Semenov A, Semeria F, Shah T, Shapiro M D, Shepard P F, Shibayama T, Shimojima M, Shochet M, Siegrist J, Signorelli G, Sill A, Sinervo P, Singh P, Slaughter A J, Sliwa K, Smith C, Snider F D, Solodsky A, Spalding J, Speer T, Sphicas P, Spinella F, Spiropulu M, Spiegel L, Steele J, Stefanini A, Strologas J, Strumia F, Stuart D, Sumorok K, Suzuki T, Takano T, Takashima R, Takikawa K, Tamburello P, Tanaka M, Tannenbaum B, Taylor W, Tecchio M, Teng P K, Terashi K, Tether S, Theriot D, Thurman-Keup R, Tipton P, Tkaczyk S, Tollefson K, Tollestrup A, Toyoda H, Trischuk W, de Troconiz J F, Tseng J, Turini N, Ukegawa F, Vaiciulis T, Valls J, Vejcik S, Velev G, Vidal R, Vilar R, Volobouev I, Vucinic D, Wagner R G, Wagner R L, Wahl J, Wallace N B, Walsh A M, Wang C, Wang C H, Wang M J, Watanabe T, Waters D, Watts T, Webb R, Wenzel H, Wester W C, Wicklund A B, Wicklund E, Williams H H, Wilson P, Winer B L, Winn D, Wolbers S, Wolinski D, Wolinski J, Wolinski S, Worm S, Wu X, Wyss J, Yagil A, Yao W, Yeh G P, Yeh P, Yoh J, Yosef C, Yoshida T, Yu I, Yu S, Yu Z, Zanetti A, Zetti F, Zucchelli S
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Phys Rev Lett. 2000 Oct 2;85(14):2886-91. doi: 10.1103/PhysRevLett.85.2886.
We have measured the polarization of J/psi and psi(2S) mesons produced in pp collisions at sqrt[s] = 1.8 TeV, using data collected at the Collider Detector at Fermilab during 1992-1995. The polarization of promptly produced J/psi [psi(2S)] mesons is isolated from those produced in B-hadron decay, and measured over the kinematic range 4 [5.5]<P(T)<20 GeV/c and |y|<0.6. For P(T) greater than or approximately equal 12 GeV/c we do not observe significant polarization in the prompt component.
我们利用1992 - 1995年期间在费米实验室对撞机探测器收集的数据，测量了质心能量√[s]=1.8 TeV的质子-质子碰撞中产生的J/ψ和ψ(2S)介子的极化。迅速产生的J/ψ[ψ(2S)]介子的极化与B强子衰变中产生的介子的极化区分开来，并在4 [5.5]<P(T)<20 GeV/c和|y|<0.6的运动学范围内进行测量。对于P(T)大于或近似等于12 GeV/c的情况，我们在迅速产生的成分中未观察到明显的极化。
