Measurement of azimuthal asymmetries in deep inelastic scattering

Breitweg, J; Chekanov, S; Derrick, M; Krakauer, D; Magill, S; Musgrave, B; Pellegrino, A; Repond, J; Stanek, R; Yoshida, R; Mck, Mattingly; Abbiendi, G; Anselmo, F; Antonioli, P; Bari, G; Basile, M; Bellagamba, L; Boscherini, D; Bruni, A; Bruni, G; Romeo, Gc; Castellini, G; Cifarelli, L; Cindolo, F; Contin, A; Coppola, N; Corradi, M; De Pasquale, S; Giusti, P; Iacobucci, G; Laurenti, G; Levi, G; Margotti, A; Massam, T; Nania, R; Palmonari, F; Pesci, A; Polini, A; Sartorelli, G; Garcia, Yz; Zichichi, A; Amelung, C; Bornheim, A; Brock, I; Coboken, K; Crittenden, J; Deffner, R; Hartmann, H; Heinloth, K; Hilger, E; Irrgang, P; Jakob, Hp; Kappes, A; Katz, Uf; Kerger, R; Paul, E; Schnurbusch, H; Stifutkin, A; Tandler, J; Voss, Kc; Weber, A; Wieber, H; Bailey, Ds; Barret, O; Brook, Nh; Foster, B; Heath, Gp; Heath, Hf; Mcfall, Jd; Piccioni, D; Rodrigues, E; Scott, J; Tapper, Rj; Capua, Marcella; Mastroberardino, Anna; Schioppa, M; Susinno, G; Jeoung, Hy; Kim, Jy; Lee, Jh; Lim, It; Kj, Ma; Pac, My; Caldwell, A; Liu, W; Liu, X; Mellado, B; Paganis, S; Sampson, S; Schmidke, Wb; Sciulli, F; Chwastowski, J; Eskreys, A; Figiel, J; Klimek, K; Olkiewicz, K; Piotrzkowski, K; Przybycien, Mb; Stopa, P; Zawiejski, L; Bednarek, B; Jelen, K; Kisielewska, D; Kowal, Am; Kowalski, T; Przybycien, M; Rulikowska Zarebska, E; Suszycki, L; Szuba, D; Kotanski, A; Lat, Bauerdick; Behrens, U; Bienlein, Jk; Burgard, C; Dannheim, D; Desler, K; Drews, G; Fox Murphy, A; Fricke, U; Goebel, F; Gottlicher, P; Graciani, R; Haas, T; Hain, W; Hartner, Gf; Hasell, D; Hebbel, K; Johnson, Kf; Kasemann, M; Koch, W; Kotz, U; Kowalski, H; Lindemann, L; Lohr, B; Martinez, M; Milite, M; Monteiro, T; Moritz, M; Notz, D; Pelucchi, F; Petrucci, Mc; Rohde, M; Prb, Saull; Savin, Aa; Schneekloth, U; Selonke, F; Sievers, M; Stonjek, S; Tassi, Enrico; Wolf, G; Wollmer, U; Youngman, C; Zeuner, W; Coldewey, C; Ald, Viani; Meyer, A; Schlenstedt, S; Straub, Pb; Barbagli, G; Gallo, E; Pelfer, P; Maccarrone, G; Votano, L; Bamberger, A; Benen, A; Eisenhardt, S; Markun, P; Raach, H; Wolfle, S; Bussey, Pj; Doyle, At; Lee, Sw; Macdonald, N; Mccance, Gj; Saxon, Dh; Sinclair, Le; Skillicorn, Io; Waugh, R; Bohnet, I; Gendner, N; Holm, U; Meyer Larsen, A; Salehi, H; Wick, K; Garfagnini, A; Gialas, I; Gladilin, Lk; Kcira, D; Klanner, R; Lohrmann, E; Poelz, G; Zetsche, F; Goncalo, R; Long, Kr; Miller, Db; Tapper, Ad; Walker, R; Mallik, U; Cloth, P; Filges, D; Ishii, T; Kuze, M; Nagano, K; Tokushuku, K; Yamada, S; Yamazaki, Y; Ahn, Sh; Lee, Sb; Park, Sk; Lim, H; Park, Ih; Son, D; Barreiro, F; Garcia, G; Glasman, C; Gonzalez, O; Labarga, L; del Peso, J; Redondo, I; Terron, J; Barbi, M; Corriveau, F; Hanna, Ds; Ochs, A; Padhi, S; Riveline, M; Stairs, Dg; Wing, M; Tsurugai, T; Bashkirov, V; Dolgoshein, Ba; Dementiev, Rk; Ermolov, Pf; Golubkov, Ya; Katkov, Ii; Khein, La; Korotkova, Na; Korzhavina, Ia; Kuzmin, Va; Lukina, Oy; Proskuryakov, As; Shcheglova, Lm; Solomin, An; Vlasov, Nn; Zotkin, Sa; Bokel, C; Botje, M; Brummer, N; Engelen, J; Grijpink, S; Koffeman, E; Kooijman, P; Schagen, S; van Sighem, A; Tiecke, H; Tuning, N; Velthuis, Jj; Vossebeld, J; Wiggers, L; de Wolf, E; Acosta, D; Bylsma, B; Durkin, Ls; Gilmore, J; Ginsburg, Cm; Kim, Cl; Ling, Ty; Boogert, S; Cooper Sarkar AM,; Rce, Devenish; Grobe Knetter, J; Matsushita, T; Ruske, O; Sutton, Mr; Walczak, R; Bertolin, A; Brugnera, R; Carlin, R; Dal Corso, F; Dosselli, U; Dusini, S; Limentani, S; Morandin, M; Posocco, P; Stanco, L; Stroili, R; Voci, C; Adamczyk, L; Iannotti, L; By, Oh; Okrasinski, Jr; Toothacker, Ws; Whitmore, Jj; Iga, Y; D'Agostini, G; Marini, G; Nigro, A; Cormack, C; Hart, Jc; Mccubbin, Na; Shah, Tp; Epperson, D; Heusch, C; Hfw, Sadrozinski; Seiden, A; Wichmann, R; Williams, Dc; Pavel, N; Abramowicz, H; Dagan, S; Kananov, S; Kreisel, A; Levy, A; Abe, T; Fusayasu, T; Umemori, K; Yamashita, T; Hamatsu, R; Hirose, T; Inuzuka, M; Kitamura, S; Nishimura, T; Arneodo, M; Cartiglia, N; Cirio, R; Costa, M; Ferrero, Mi; Maselli, S; Monaco, V; Peroni, C; Ruspa, M; Sacchi, R; Solano, A; Staiano, A; Dardo, M; Bailey, Dc; Fagerstroem, Cp; Galea, R; Koop, T; Levman, Gm; Martin, Jf; Orr, Rs; Polenz, S; Sabetfakhri, A; Simmons, D; Butterworth, Jm; Catterall, Cd; Hayes, Me; Heaphy, Ea; Jones, Tw; Lane, Jb; West, Bj; Ciborowski, J; Ciesielski, R; Grzelak, G; Nowak, Rj; Pawlak, Jm; Pawlak, R; Smalska, B; Tymieniecka, T; Wroblewski, Ak; Zakrzewski, Ja; Zarnecki, Af; Adamus, M; Gadaj, T; Deppe, O; Eisenberg, Y; Hochman, D; Karshon, U; Badgett, Wf; Chapin, D; Cross, R; Foudas, C; Mattingly, S; Reeder, Dd; Smith, Wh; Vaiciulis, A; Wildschek, T; Wodarczyk, M; Deshpande, A; Dhawan, S; Hughes, Vw; Bhadra, S; Catterall, C; Cole, Je; Frisken, Wr; Hall Wilton, R; Khakzad, M; Menary, S.

doi:10.1016/S0370-2693(00)00430-5

The distribution of the azimuthal angle for the charged hadrons has been studied in the hadronic centre-of-mass system for neutral current deep inelastic positron-proton scattering with the ZEUS detector at HERA. Measurements of the dependence of the moments of this distribution on the transverse momenta of the charged hadrons are presented. Asymmetries that can be unambiguously attributed to perturbative QCD processes have been observed for the first time. (C) 2000 Elsevier Science B.V. All rights reserved.