Content area
Abstract
The distribution of the azimuthal angle of charged and neutral hadrons relative to the lepton plane has been studied for neutral current deep inelastic ep scattering using an integrated luminosity of 45 pb-1 taken with the ZEUS detector. The kinematic range is 100<Q2<8000 GeV2, 0.2<y<0.8 and 0.01<x<0.1 where Q2 is the virtuality of the exchanged boson, y is the inelasticity and x is the Bjorken variable. The measurements were made in the hadronic centre-of-mass system. The analysis exploits the energy-flow method, which allows the measurement to be made over a larger range of pseudorapidity compared to previous results. The dependence of the moments of the azimuthal distributions on the pseudorapidity and minimum transverse energy of the final-state hadrons are presented. Although the predictions from next-to-leading-order QCD describe the data better than do the Monte Carlo models incorporating leading-logarithm parton showers, they still fail to describe the magnitude of the asymmetries. This suggests that higher-order calculations may be necessary to describe these data.
Details
Title
Measurement of azimuthal asymmetries in neutral current deep inelastic scattering at HERA
Author
Chekanov, S 1 ; Derrick, M 1 ; Magill, S 1 ; Miglioranzi, S 1 ; Musgrave, B 1 ; Nicholass, D 1 ; Repond, J 1 ; Yoshida, R 1 ; Mattingly, MCK 2 ; Pavel, N 3 ; AG Yagües Molina 3 ; Antonelli, S 4 ; Antonioli, P 4 ; Bari, G 4 ; Basile, M 4 ; Bellagamba, L 4 ; Bindi, M 4 ; Boscherini, D 4 ; Bruni, A 4 ; Bruni, G 4 ; Cifarelli, L 4 ; Cindolo, F 4 ; Contin, A 4 ; Corradi, M 4 ; De Pasquale, S 4 ; Iacobucci, G 4 ; Margotti, A 4 ; Nania, R 4 ; Polini, A 4 ; Rinaldi, L 4 ; Sartorelli, G 4 ; Zichichi, A 4 ; Aghuzumtsyan, G 5 ; Bartsch, D 5 ; Brock, I 5 ; Goers, S 5 ; Hartmann, H 5 ; Hilger, E 5 ; H-P, Jakob 5 ; Jüngst, M 5 ; Kind, OM 5 ; Paul, E 5 ; Rautenberg, J 5 ; Renner, R 5 ; Samson, U 5 ; Schönberg, V 5 ; Wang, M 5 ; Wlasenko, M 5 ; Brook, N H 6 ; Heath, G P 6 ; Morris, J D 6 ; Namsoo, T 6 ; Capua, M 7 ; Fazio, S 7 ; Mastroberardino, A 7 ; Schioppa, M 7 ; Susinno, G 7 ; Tassi, E 7 ; Kim, J Y 8 ; Ma, K J 8 ; Ibrahim, Z A 9 ; Kamaluddin, B 9 ; WAT Wan Abdullah 9 ; Ning, Y 10 ; Ren, Z 10 ; Sciulli, F 10 ; Chwastowski, J 11 ; Eskreys, A 11 ; Figiel, J 11 ; Galas, A 11 ; Gil, M 11 ; Olkiewicz, K 11 ; Stopa, P 11 ; Zawiejski, L 11 ; Adamczyk, L 12 ; Bołd, T 12 ; Grabowska-Bołd, I 12 ; Kisielewska, D 12 ; Łukasik, J 12 ; Przybycień, M 12 ; Suszycki, L 12 ; Kotański, A 13 ; Słomiński, W 13 ; Adler, V 14 ; Behrens, U 14 ; Bloch, I 14 ; Bonato, A 14 ; Borras, K 14 ; Coppola, N 14 ; Fourletova, J 14 ; Geiser, A 14 ; Gladkov, D 14 ; Göttlicher, P 14 ; Gregor, I 14 ; Gutsche, O 14 ; Haas, T 14 ; Hain, W 14 ; Horn, C 14 ; Kahle, B 14 ; Kötz, U 14 ; Kowalski, H 14 ; Lim, H 14 ; Lobodzinska, E 14 ; Löhr, B 14 ; Mankel, R 14 ; I-A Melzer-Pellmann 14 ; Montanari, A 14 ; Nguyen, C N 14 ; Notz, D 14 ; Nuncio-Quiroz, A E 14 ; Santamarta, R 14 ; Schneekloth, U 14 ; Spiridonov, A 14 ; Stadie, H 14 ; Stösslein, U 14 ; Szuba, D 14 ; Szuba, J 14 ; Theedt, T 14 ; Watt, G 14 ; Wolf, G 14 ; Wrona, K 14 ; Youngman, C 14 ; Zeuner, W 14 ; Schlenstedt, S 15 ; Barbagli, G 16 ; Gallo, E 16 ; Pelfer, P G 16 ; Bamberger, A 17 ; Dobur, D 17 ; Karstens, F 17 ; Vlasov, N N 17 ; Bussey, P J 18 ; Doyle, A T 18 ; Dunne, W 18 ; Ferrando, J 18 ; Saxon, D H 18 ; Skillicorn, I O 18 ; Gialas, I 19 ; Gosau, T 20 ; Holm, U 20 ; Klanner, R 20 ; Lohrmann, E 20 ; Salehi, H 20 ; Schleper, P 20 ; Schörner-Sadenius, T 20 ; Sztuk, J 20 ; Wichmann, K 20 ; Wick, K 20 ; Foudas, C 21 ; Fry, C 21 ; Long, K R 21 ; Tapper, AD 21 ; Kataoka, M 22 ; Matsumoto, T 22 ; Nagano, K 22 ; Tokushuku, K 22 ; Yamada, S 22 ; Yamazaki, Y 22 ; AN Barakbaev 23 ; Boos, E G 23 ; Dossanov, A 23 ; Pokrovskiy, N S 23 ; Zhautykov, BO 23 ; Son, D 24 ; de Favereau, J 25 ; Piotrzkowski, K 25 ; Barreiro, F 26 ; Glasman, C 26 ; Jimenez, M 26 ; Labarga, L 26 ; J del Peso 26 ; Ron, E 26 ; Terrón, J 26 ; Zambrana, M 26 ; Corriveau, F 27 ; Liu, C 27 ; Walsh, R 27 ; Zhou, C 27 ; Tsurugai, T 28 ; Antonov, A 29 ; BA Dolgoshein 29 ; Rubinsky, I 29 ; Sosnovtsev, V 29 ; Stifutkin, A 29 ; Suchkov, S 29 ; Dementiev, R K 30 ; Ermolov, P F 30 ; Gladilin, L K 30 ; Katkov, I I 30 ; LA Khein 30 ; Korzhavina, IA 30 ; Kuzmin, V A 30 ; Levchenko, B B 30 ; Lukina, O Y 30 ; Proskuryakov, A S 30 ; Shcheglova, L M 30 ; Zotkin, D S 30 ; Zotkin, SA 30 ; Abt, I 31 ; Büttner, C 31 ; Caldwell, A 31 ; Kollar, D 31 ; Schmidke, W B 31 ; Sutiak, J 31 ; Grigorescu, G 32 ; Keramidas, A 32 ; Koffeman, E 32 ; Kooijman, P 32 ; Pellegrino, A 32 ; Tiecke, H 32 ; Vázquez, M 32 ; Wiggers, L 32 ; Brümmer, N 33 ; Bylsma, B 33 ; Durkin, L S 33 ; Lee, A 33 ; Ling, TY 33 ; Allfrey, P D 34 ; Bell, MA 34 ; Cooper-Sarkar, A M 34 ; Cottrell, A 34 ; Devenish, RCE 34 ; Foster, B 34 ; Gwenlan, C 34 ; Korcsak-Gorzo, K 34 ; Patel, S 34 ; Roberfroid, V 34 ; Robertson, A 34 ; Straub, P B 34 ; Uribe-Estrada, C 34 ; Walczak, R 34 ; Bellan, P 35 ; Bertolin, A 35 ; Brugnera, R 35 ; Carlin, R 35 ; Ciesielski, R 35 ; F Dal Corso 35 ; Dusini, S 35 ; Garfagnini, A 35 ; Limentani, S 35 ; Longhin, A 35 ; Stanco, L 35 ; Turcato, M 35 ; Oh, B Y 36 ; Raval, A 36 ; Ukleja, J 36 ; Whitmore, J J 36 ; Iga, Y 37 ; G D’Agostini 38 ; Marini, G 38 ; Nigro, A 38 ; Cole, JE 39 ; Hart, J C 39 ; Abramowicz, H 40 ; Gabareen, A 40 ; Ingbir, R 40 ; Kananov, S 40 ; Levy, A 40 ; Kuze, M 41 ; Hori, R 42 ; Kagawa, S 42 ; Shimizu, S 42 ; Tawara, T 42 ; Hamatsu, R 43 ; Kaji, H 43 ; Kitamura, S 43 ; Ota, O 43 ; Ri, Y D 43 ; Ferrero, MI 44 ; Monaco, V 44 ; Sacchi, R 44 ; Solano, A 44 ; Arneodo, M 45 ; Ruspa, M 45 ; Fourletov, S 46 ; Martin, J F 46 ; Boutle, S K 47 ; Butterworth, J M 47 ; Hall-Wilton, R 47 ; Jones, T W 47 ; Loizides, J H 47 ; Sutton, M R 47 ; Targett-Adams, C 47 ; Wing, M 47 ; Brzozowska, B 48 ; Ciborowski, J 48 ; Grzelak, G 48 ; Kulinski, P 48 ; Łużniak, P 48 ; Malka, J 48 ; Nowak, R J 48 ; Pawlak, J M 48 ; Tymieniecka, T 48 ; Ukleja, A 48 ; Żarnecki, A F 48 ; Adamus, M 49 ; Plucinski, P 49 ; Eisenberg, Y 50 ; Giller, I 50 ; Hochman, D 50 ; Karshon, U 50 ; Rosin, M 50 ; Brownson, E 51 ; Danielson, T 51 ; Everett, A 51 ; Kcira, D 51 ; Reeder, D D 51 ; Ryan, P 51 ; Savin, A A 51 ; Smith, W H 51 ; Wolfe, H 51 ; Bhadra, S 52 ; Catterall, C D 52 ; Cui, Y 52 ; Hartner, G 52 ; Menary, S 52 ; Noor, U 52 ; Soares, M 52 ; Standage, J 52 ; Whyte, J 52
1 Argonne National Laboratory, Argonne, Illinois, USA
2 Andrews University, Berrien Springs, Michigan, USA
3 Institut für Physik der Humboldt-Universität zu Berlin, Berlin, Germany
4 University and INFN Bologna, Bologna, Italy
5 Physikalisches Institut der Universität Bonn, Bonn, Germany
6 H.H. Wills Physics Laboratory, University of Bristol, Bristol, U.K.
7 Physics Department and INFN, Calabria University, Cosenza, Italy
8 Chonnam National University, Kwangju, South Korea
9 Jabatan Fizik, Universiti Malaya, Kuala Lumpur, Malaysia
10 Nevis Laboratories, Columbia University, Irvington on Hudson, New York, USA
11 The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland
12 Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Cracow, Poland
13 Department of Physics, Jagellonian University, Cracow, Poland
14 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
15 Deutsches Elektronen-Synchrotron DESY, Zeuthen, Germany
16 University and INFN, Florence, Italy
17 Fakultät für Physik der Universität Freiburg i.Br., Freiburg i.Br., Germany
18 Department of Physics and Astronomy, University of Glasgow, Glasgow, U.K.
19 Department of Engineering in Management and Finance, Univ. of Aegean, Aegean, Greece
20 Institute of Exp. Physics, Hamburg University, Hamburg, Germany
21 High Energy Nuclear Physics Group, Imperial College London, London, U.K.
22 Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan
23 Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan, Almaty, Kazakhstan
24 Center for High Energy Physics, Kyungpook National University, Daegu, South Korea
25 Institut de Physique Nucléaire, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
26 Departamento de Física Teórica, Universidad Autónoma de Madrid, Madrid, Spain
27 Department of Physics, McGill University, Québec, Canada
28 Faculty of General Education, Meiji Gakuin University, Yokohama, Japan
29 Moscow Engineering Physics Institute, Moscow, Russia
30 Institute of Nuclear Physics, Moscow State University, Moscow, Russia
31 Max-Planck-Institut für Physik, München, Germany
32 NIKHEF and University of Amsterdam, Amsterdam, Netherlands
33 Physics Department, Ohio State University, Columbus, Ohio, USA
34 Department of Physics, University of Oxford, Oxford, U.K.
35 Dipartimento di Fisica dell’ Università and INFN, Padova, Italy
36 Department of Physics, Pennsylvania State University, University Park, Pennsylvania, USA
37 Polytechnic University, Sagamihara, Japan
38 Dipartimento di Fisica, Università ”La Sapienza” and INFN, Rome, Italy
39 Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, U.K.
40 Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel-Aviv University, Tel-Aviv, Israel
41 Department of Physics, Tokyo Institute of Technology, Tokyo, Japan
42 Department of Physics, University of Tokyo, Tokyo, Japan
43 Department of Physics, Tokyo Metropolitan University, Tokyo, Japan
44 Università di Torino and INFN, Torino, Italy
45 Università del Piemonte Orientale, Novara, and INFN, Torino, Italy
46 Department of Physics, University of Toronto, Ontario, Canada
47 Physics and Astronomy Department, University College London, London, U.K.
48 Institute of Experimental Physics, Warsaw University, Warsaw, Poland
49 Institute for Nuclear Studies, Warsaw, Poland
50 Department of Particle Physics, Weizmann Institute, Rehovot, Israel
51 Department of Physics, University of Wisconsin, Madison, Wisconsin, USA
52 Department of Physics, York University, Ontario, Canada
1 Argonne National Laboratory, Argonne, Illinois, USA
2 Andrews University, Berrien Springs, Michigan, USA
3 Institut für Physik der Humboldt-Universität zu Berlin, Berlin, Germany
4 University and INFN Bologna, Bologna, Italy
5 Physikalisches Institut der Universität Bonn, Bonn, Germany
6 H.H. Wills Physics Laboratory, University of Bristol, Bristol, U.K.
7 Physics Department and INFN, Calabria University, Cosenza, Italy
8 Chonnam National University, Kwangju, South Korea
9 Jabatan Fizik, Universiti Malaya, Kuala Lumpur, Malaysia
10 Nevis Laboratories, Columbia University, Irvington on Hudson, New York, USA
11 The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland
12 Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Cracow, Poland
13 Department of Physics, Jagellonian University, Cracow, Poland
14 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
15 Deutsches Elektronen-Synchrotron DESY, Zeuthen, Germany
16 University and INFN, Florence, Italy
17 Fakultät für Physik der Universität Freiburg i.Br., Freiburg i.Br., Germany
18 Department of Physics and Astronomy, University of Glasgow, Glasgow, U.K.
19 Department of Engineering in Management and Finance, Univ. of Aegean, Aegean, Greece
20 Institute of Exp. Physics, Hamburg University, Hamburg, Germany
21 High Energy Nuclear Physics Group, Imperial College London, London, U.K.
22 Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan
23 Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan, Almaty, Kazakhstan
24 Center for High Energy Physics, Kyungpook National University, Daegu, South Korea
25 Institut de Physique Nucléaire, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
26 Departamento de Física Teórica, Universidad Autónoma de Madrid, Madrid, Spain
27 Department of Physics, McGill University, Québec, Canada
28 Faculty of General Education, Meiji Gakuin University, Yokohama, Japan
29 Moscow Engineering Physics Institute, Moscow, Russia
30 Institute of Nuclear Physics, Moscow State University, Moscow, Russia
31 Max-Planck-Institut für Physik, München, Germany
32 NIKHEF and University of Amsterdam, Amsterdam, Netherlands
33 Physics Department, Ohio State University, Columbus, Ohio, USA
34 Department of Physics, University of Oxford, Oxford, U.K.
35 Dipartimento di Fisica dell’ Università and INFN, Padova, Italy
36 Department of Physics, Pennsylvania State University, University Park, Pennsylvania, USA
37 Polytechnic University, Sagamihara, Japan
38 Dipartimento di Fisica, Università ”La Sapienza” and INFN, Rome, Italy
39 Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, U.K.
40 Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel-Aviv University, Tel-Aviv, Israel
41 Department of Physics, Tokyo Institute of Technology, Tokyo, Japan
42 Department of Physics, University of Tokyo, Tokyo, Japan
43 Department of Physics, Tokyo Metropolitan University, Tokyo, Japan
44 Università di Torino and INFN, Torino, Italy
45 Università del Piemonte Orientale, Novara, and INFN, Torino, Italy
46 Department of Physics, University of Toronto, Ontario, Canada
47 Physics and Astronomy Department, University College London, London, U.K.
48 Institute of Experimental Physics, Warsaw University, Warsaw, Poland
49 Institute for Nuclear Studies, Warsaw, Poland
50 Department of Particle Physics, Weizmann Institute, Rehovot, Israel
51 Department of Physics, University of Wisconsin, Madison, Wisconsin, USA
52 Department of Physics, York University, Ontario, Canada
Pages
289-299
Publication year
2007
Publication date
Jul 2007
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2293791061
Copyright
The European Physical Journal C is a copyright of Springer, (2007). All Rights Reserved.