Đo lường sản xuất D ± trong tán xạ ep sâu không đàn hồi với detector ZEUS tại HERA

Journal of High Energy Physics - Tập 2013 - Trang 1-31 - 2013
H. Abramowicz1, I. Abt2, L. Adamczyk3, M. Adamus4, R. Aggarwal5, S. Antonelli6, P. Antonioli7, A. Antonov8, M. Arneodo9, O. Arslan10, V. Aushev11,12, Y. Aushev12, O. Bachynska13, A. Bamberger14, A. N. Barakbaev15, G. Barbagli16, G. Bari7, F. Barreiro17, N. Bartosik13, D. Bartsch10, M. Basile6, O. Behnke13, J. Behr13, U. Behrens13, L. Bellagamba7, A. Bertolin18, S. Bhadra19, M. Bindi6, C. Blohm13, V. Bokhonov11, T. Bold3, E. G. Boos15, K. Borras13, D. Boscherini7, D. Bot13, I. Brock10, E. Brownson20, R. Brugnera21, N. Brümmer22, A. Bruni7, G. Bruni7, B. Brzozowska23, P. J. Bussey24, B. Bylsma22, A. Caldwell2, M. Capua25, R. Carlin21, C. D. Catterall19, S. Chekanov26, J. Chwastowski27,28, J. Ciborowski23,29, R. Ciesielski13,30, L. Cifarelli6, F. Cindolo7, A. Contin6, A. M. Cooper-Sarkar31, N. Coppola13, M. Corradi7, F. Corriveau32, M. Costa33, G. D’Agostini34, F. Dal Corso18, J. del Peso17, R. K. Dementiev35, S. De Pasquale6,36, M. Derrick26, R. C. E. Devenish31, D. Dobur14,37, B. A. Dolgoshein8, G. Dolinska13, A. T. Doyle24, V. Drugakov38, L. S. Durkin22, S. Dusini18, Y. Eisenberg39, P. F. Ermolov35, A. Eskreys27, S. Fang13,40, S. Fazio25, J. Ferrando24, M. I. Ferrero33, J. Figiel27, B. Foster31, G. Gach3, A. Galas27, E. Gallo16, A. Garfagnini21, A. Geiser13, I. Gialas41,42, A. Gizhko13, L. K. Gladilin35, D. Gladkov8, C. Glasman17, O. Gogota12, Yu. A. Golubkov35, P. Göttlicher13,43, I. Grabowska-Bold3, J. Grebenyuk13, I. Gregor13, G. Grigorescu44, G. Grzelak23, O. Gueta1, M. Guzik3, C. Gwenlan31, T. Haas13, W. Hain13, R. Hamatsu45, J. C. Hart46, H. Hartmann10, G. Hartner19, E. Hilger10, D. Hochman39, R. Hori47, A. Hüttmann13, Z. A. Ibrahim48, Y. Iga49, R. Ingbir1, M. Ishitsuka50, A. Iudin12, H.-P. Jakob10, F. Januschek13, T. W. Jones51, M. Jüngst10, I. Kadenko12, B. Kahle13, S. Kananov1, T. Kanno50, U. Karshon39, F. Karstens14,52, I. I. Katkov13,53, M. Kaur5, P. Kaur5, A. Keramidas44, L. A. Khein35, J. Y. Kim54, D. Kisielewska3, S. Kitamura45,55, R. Klanner56, U. Klein13,57, E. Koffeman44, N. Kondrashova12, O. Kononenko12, P. Kooijman44, Ie. Korol13, I. A. Korzhavina35, A. Kotanski58, U. Kötz13, N. Kovalchuk12, H. Kowalski13, O. Kuprash13, M. Kuze50, A. Lee22, B. B. Levchenko35, A. Levy1, V. Libov13, S. Limentani21, T. Y. Ling22, M. Lisovyi13, E. Lobodzinska13, W. Lohmann38, B. Löhr13, E. Lohrmann56, K. R. Long59, A. Longhin18,60, D. Lontkovskyi13, O. Yu. Lukina35, J. Maeda50,61, S. Magill26, I. Makarenko13, J. Malka13, R. Mankel13, A. Margotti7, G. Marini34, J. F. Martin62, A. Mastroberardino25, M. C. K. Mattingly63, I.-A. Melzer-Pellmann13, S. Mergelmeyer10, S. Miglioranzi13,64, F. Mohamad Idris48, V. Monaco33, A. Montanari13, J. D. Morris65,66, K. Mujkic13,67, B. Musgrave26, K. Nagano68, T. Namsoo13,69, R. Nania7, A. Nigro34, Y. Ning70, T. Nobe50, D. Notz13, R. J. Nowak23, A. E. Nuncio-Quiroz10, B. Y. Oh71, N. Okazaki47, K. Olkiewicz27, Yu. Onishchuk12, K. Papageorgiu41, A. Parenti13, E. Paul10, J. M. Pawlak23, B. Pawlik27, P. G. Pelfer72, A. Pellegrino44, W. Perlanski23, H. Perrey13, K. Piotrzkowski73, P. Plucinski4,74, N. S. Pokrovskiy15, A. Polini7, A. S. Proskuryakov35, M. Przybycien3, A. Raval13, D. D. Reeder20, B. Reisert2, Z. Ren70, J. Repond26, Y. D. Ri45,75, A. Robertson31, P. Roloff13,64, I. Rubinsky13, M. Ruspa9, R. Sacchi33, U. Samson10, G. Sartorelli6, A. A. Savin20, D. H. Saxon24, M. Schioppa25, S. Schlenstedt38, P. Schleper56, W. B. Schmidke76, U. Schneekloth13, V. Schönberg10, T. Schörner-Sadenius13, J. Schwartz32, F. Sciulli70, L. M. Shcheglova35, R. Shehzadi10, S. Shimizu47,64, I. Singh5, I. O. Skillicorn24, W. Slominski58, W. H. Smith20, V. Sola56, A. Solano33, D. Son77, V. Sosnovtsev8, A. Spiridonov13,78, H. Stadie56, L. Stanco18, N. Stefaniuk12, A. Stern1, T. P. Stewart62, A. Stifutkin8, P. Stopa27, S. Suchkov8, G. Susinno25, L. Suszycki3, J. Sztuk-Dambietz56, D. Szuba56, J. Szuba13,79, A. D. Tapper59, E. Tassi25,80, J. Terrón17, T. Theedt13, H. Tiecke44, K. Tokushuku68,81, J. Tomaszewska13, A. Trofymov12, V. Trusov12, T. Tsurugai82, M. Turcato56, O. Turkot12, T. Tymieniecka4,83, M. Vázquez44,64, A. Verbytskyi13, O. Viazlo12, N. N. Vlasov14,84, R. Walczak31, W. A. T. Wan Abdullah48, J. J. Whitmore71, K. Wichmann13, L. Wiggers44, M. Wing51, M. Wlasenko10, G. Wolf13, H. Wolfe20, K. Wrona13, A. G. Yagües-Molina13, S. Yamada68, Y. Yamazaki68,85, R. Yoshida26, C. Youngman13, N. Zakharchuk12, A. F. Żarnecki23, L. Zawiejski27, O. Zenaiev13, W. Zeuner13,64, B. O. Zhautykov15, N. Zhmak11, A. Zichichi6, Z. Zolkapli48, D. S. Zotkin35
1Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel-Aviv University, Tel-Aviv, Israel
2Max-Planck-Institut für Physik, München, Germany
3AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland
4National Centre for Nuclear Research, Warsaw, Poland
5Department of Physics, Panjab University, Chandigarh, India
6University and INFN Bologna, Bologna, Italy
7INFN Bologna, Bologna, Italy
8Moscow Engineering Physics Institute, Moscow, Russia
9Università del Piemonte Orientale, Novara, and INFN, Torino, Italy
10Physikalisches Institut der Universität Bonn, Bonn, Germany
11Institute for Nuclear Research, National Academy of Sciences, Kyiv, Ukraine
12Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine
13Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
14Fakultät für Physik der Universität Freiburg i.Br., Freiburg i.Br., Germany
15Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan, Almaty, Kazakhstan
16INFN Florence, Florence, Italy
17Departamento de Física Teórica, Universidad Autónoma de Madrid, Madrid, Spain
18INFN Padova, Padova, Italy
19Department of Physics, York University, Toronto, Canada
20Department of Physics, University of Wisconsin, Madison, USA
21Dipartimento di Fisica dell’ Università and INFN, Padova, Italy
22Physics Department, Ohio State University, Columbus, USA
23Faculty of Physics, University of Warsaw, Warsaw, Poland
24School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
25Physics Department and INFN, Calabria University, Cosenza, Italy
26Argonne National Laboratory, Argonne, USA
27The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland
28Cracow University of Technology, Faculty of Physics, Mathematics and Applied Computer Science, Cracow, Poland
29Lódz University, Lódz, Poland
30Rockefeller University New York USA
31Department of Physics, University of Oxford, Oxford, United Kingdom
32Department of Physics, McGill University, Montréal, Canada
33Università di Torino and INFN, Torino, Italy
34Dipartimento di Fisica, Università ‘La Sapienza’ and INFN, Rome, Italy
35Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia
36University of Salerno, Salerno, Italy
37Istituto Nazionale di Fisica Nucleare (INFN), Pisa, Italy
38Deutsches Elektronen-Synchrotron DESY, Zeuthen, Germany
39Department of Particle Physics and Astrophysics, Weizmann Institute, Rehovot, Israel
40Institute of High Energy Physics, Beijing, China
41Department of Engineering in Management and Finance, Univ. of the Aegean, Chios, Greece
42DESY, Hamburg, Germany
43DESY group FEB, Hamburg, Germany
44NIKHEF and University of Amsterdam, Amsterdam, Netherlands
45Department of Physics, Tokyo Metropolitan University, Tokyo, Japan
46Rutherford Appleton Laboratory, Oxon, United Kingdom
47Department of Physics, University of Tokyo, Tokyo, Japan
48Jabatan Fizik, Universiti Malaya, Kuala Lumpur, Malaysia
49Polytechnic University, Tokyo, Japan
50Department of Physics, Tokyo Institute of Technology, Tokyo, Japan
51Physics and Astronomy Department, University College London, London, United Kingdom
52Haase Energie Technik AG, Neumünster, Germany
53Moscow State University, Moscow, Russia
54Institute for Universe and Elementary Particles, Chonnam National University, Kwangju, South Korea
55Nihon Institute of Medical Science, Saitama, Japan
56Hamburg University, Institute of Experimental Physics, Hamburg, Germany
57University of Liverpool, Liverpool, United Kingdom
58Department of Physics, Jagellonian University, Cracow, Poland
59Imperial College London, High Energy Nuclear Physics Group, London, United Kingdom
60LNF, Frascati, Italy
61Tokyo Metropolitan University, Tokyo, Japan
62Department of Physics, University of Toronto, Toronto, Canada
63Andrews University, Berrien Springs, USA
64CERN, Geneva, Switzerland
65H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
66Queen Mary University of London, London, United Kingdom
67University College London, London, UK
68Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan
69Goldman Sachs, London, UK
70Nevis Laboratories, Columbia University, Irvington on Hudson, USA
71Department of Physics, Pennsylvania State University, University Park, USA
72University and INFN Florence, Florence, Italy
73Institut de Physique Nucléaire, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
74Department of Physics, Stockholm University, Stockholm, Sweden
75Osaka University, Osaka, Japan
76Max-Planck Institut für Physik, München, Germany
77Kyungpook National University, Center for High Energy Physics, Daegu, South Korea
78Institute of Theoretical and Experimental Physics, Moscow, Russia
79FPACS, AGH-UST, Cracow, Poland
80Senior Alexander von Humboldt Research Fellow at Hamburg University, Institute of Experimental Physics, Hamburg, Germany
81University of Tokyo, Tokyo, Japan
82Meiji Gakuin University, Faculty of General Education, Yokohama, Japan
83Cardinal Stefan Wyszynski University, Warsaw, Poland
84Department of Physics, University of Bonn, Bonn, Germany
85Kobe University, Kobe, Japan

Tóm tắt

Sản xuất charm trong quá trình tán xạ ep sâu không đàn hồi đã được đo lường bằng detector ZEUS sử dụng độ sáng tích hợp 354 pb−1. Các quark charm được xác định thông qua việc tái tạo các meson D ± trong kênh phân rã D ± → K ∓π±π±. Thông tin thời gian sống đã được sử dụng để giảm thiểu đáng kể nhiễu loạn tổ hợp. Các phần mềm chéo phân biệt đã được đo lường trong vùng động lực học 5 < Q 2 < 1000 GeV2, 0.02 < y < 0.7, 1.5 < p T (D ±) < 15 GeV và |η(D ±)| < 1.6, trong đó Q 2 là ảo tính của photon, y là độ không đàn hồi, và p T (D ±) và η(D ±) lần lượt là động lượng ngang và pseudorapidity của meson D ±. Dự đoán QCD bậc tiếp theo đã được so sánh với dữ liệu. Đóng góp charm, $ F_2^{{c\overline{c}}} $ , cho hàm cấu trúc proton F 2 đã được trích xuất.

Từ khóa

#Charm quark #tán xạ sâu không đàn hồi #meson D ± #độ sáng tích hợp #dự đoán QCD

Tài liệu tham khảo

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Journal of High Energy Physics

Tập 2013

1-31

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