Search for lepton-flavor violation in e⁺p collisions at DESY HERA

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S. Chekanov, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, A. Pellegrino, J. Repond, and R. Yoshida
Argonne National Laboratory, Argonne, Illinois 60439-4815

M. C. K. Mattingly
Andrews University, Berrien Springs, Michigan 49104-0380

P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, G. Sartorelli, and A. Zichichi
University and INFN Bologna, Bologna, Italy

G. Aghuzumtsyan, D. Bartsch, I. Brock, J. Crittenden^*, S. Goers, H. Hartmann, E. Hilger, P. Irrgang, H.-P. Jakob, A. Kappes, U. F. Katz^†, R. Kerger, O. Kind, E. Paul, J. Rautenberg, R. Renner, H. Schnurbusch, A. Stifutkin, J. Tandler, K. C. Voss, A. Weber, and H. Wessoleck
Physikalisches Institut der Universität Bonn, Bonn, Germany

D. S. Bailey, N. H. Brook, J. E. Cole, B. Foster, G. P. Heath, H. F. Heath, S. Robins, E. Rodrigues, J. Scott, R. J. Tapper, and M. Wing
H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom

M. Capua, A. Mastroberardino, M. Schioppa, and G. Susinno
Calabria University, Physics Department and INFN, Cosenza, Italy

H. Y. Jeoung, J. Y. Kim, J. H. Lee, I. T. Lim, K. J. Ma, and M. Y. Pac^‡
Chonnam National University, Kwangju, Korea

A. Caldwell, M. Helbich, X. Liu, B. Mellado, S. Paganis, W. B. Schmidke, and F. Sciulli
Nevis Laboratories, Columbia University, Irvington on Hudson, New York 10027

J. Chwastowski, A. Eskreys, J. Figiel, K. Olkiewicz, M. B. Przybycień^§, P. Stopa, and L. Zawiejski
Institute of Nuclear Physics, Cracow, Poland

B. Bednarek, I. Grabowska-Bold, K. Jeleń, D. Kisielewska, A. M. Kowal, M. Kowal, T. Kowalski, B. Mindur, M. Przybycień, E. Rulikowska-Zarȩbska, L. Suszycki, D. Szuba, and J. Szuba
Faculty of Physics and Nuclear Techniques, University of Mining and Metallurgy, Cracow, Poland

A. Kotański and W. Słomiński^**
Department of Physics, Jagellonian University, Cracow, Poland

L. A. T. Bauerdick^††, U. Behrens, K. Borras, V. Chiochia, D. Dannheim, K. Desler^‡‡, G. Drews, J. Fourletova, A. Fox-Murphy, U. Fricke, A. Geiser, F. Goebel, P. Göttlicher, R. Graciani, T. Haas, W. Hain, G. F. Hartner, S. Hillert, U. Kötz, H. Kowalski, H. Labes, D. Lelas, B. Löhr, R. Mankel, J. Martens^a, M. Martínez^††, M. Moritz, D. Notz, M. C. Petrucci, A. Polini, U. Schneekloth, F. Selonke, S. Stonjek, B. Surrow^b, J. J. Whitmore^c, R. Wichmann^d, G. Wolf, C. Youngman, and W. Zeuner
Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany

C. Coldewey^e, A. Lopez-Duran Viani, A. Meyer, and S. Schlenstedt
DESY Zeuthen, Zeuthen, Germany

G. Barbagli, E. Gallo, C. Genta, and P. G. Pelfer
University and INFN, Florence, Italy

A. Bamberger, A. Benen, N. Coppola, P. Markun, H. Raach, and S. Wölfle
Fakultät für Physik der Universität Freiburg i.Br., Freiburg i.Br., Germany

M. Bell, P. J. Bussey, A. T. Doyle, C. Glasman, S. Hanlon, S. W. Lee, A. Lupi, G. J. McCance, D. H. Saxon, and I. O. Skillicorn
Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom

B. Bodmann, U. Holm, H. Salehi, K. Wick, A. Ziegler, and Ar. Ziegler
Hamburg University, I. Institute of Experimental Physics, Hamburg, Germany

T. Carli, I. Gialas^f, K. Klimek, E. Lohrmann, and M. Milite
Hamburg University, II. Institute of Experimental Physics, Hamburg, Germany

C. Collins-Tooth, C. Foudas, R. Gonçalo, K. R. Long, F. Metlica, D. B. Miller, A. D. Tapper, and R. Walker
Imperial College London, High Energy Nuclear Physics Group, London, United Kingdom

P. Cloth and D. Filges
Forschungszentrum Jülich, Institut für Kernphysik, Jülich, Germany

M. Kuze, K. Nagano, K. Tokushuku^g, S. Yamada, and Y. Yamazaki
Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan

A. N. Barakbaev, E. G. Boos, N. S. Pokrovskiy, and B. O. Zhautykov
Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan, Almaty, Kazakhstan

S. H. Ahn, S. B. Lee, and S. K. Park
Korea University, Seoul, Korea

H. Lim and D. Son
Kyungpook National University, Taegu, Korea

F. Barreiro, G. García, O. González, L. Labarga, J. del Peso, I. Redondo, J. Terrón, and M. Vázquez
Departamento de Física Teórica, Universidad Autónoma Madrid, Madrid, Spain

M. Barbi, A. Bertolin, F. Corriveau, A. Ochs, S. Padhi, D. G. Stairs, and M. St-Laurent
Department of Physics, McGill University, Montréal, Québec, Canada H3A 2T8

T. Tsurugai
Meiji Gakuin University, Faculty of General Education, Yokohama, Japan

A. Antonov, V. Bashkirov^h, P. Danilov, B. A. Dolgoshein, D. Gladkov, V. Sosnovtsev, and S. Suchkov
Moscow Engineering Physics Institute, Moscow, Russia

R. K. Dementiev, P. F. Ermolov, Yu. A. Golubkov, I. I. Katkov, L. A. Khein, N. A. Korotkova, I. A. Korzhavina, V. A. Kuzmin, B. B. Levchenko, O. Yu. Lukina, A. S. Proskuryakov, L. M. Shcheglova, A. N. Solomin, N. N. Vlasov, and S. A. Zotkin
Moscow State University, Institute of Nuclear Physics, Moscow, Russia

C. Bokel, J. Engelen, S. Grijpink, E. Koffeman, P. Kooijman, E. Maddox, S. Schagen, E. Tassi, H. Tiecke, N. Tuning, J. J. Velthuis, L. Wiggers, and E. de Wolf
NIKHEF and University of Amsterdam, Amsterdam, Netherlands

N. Brümmer, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, and T. Y. Ling
Physics Department, Ohio State University, Columbus, Ohio 43210

S. Boogert, A. M. Cooper-Sarkar, R. C. E. Devenish, J. Ferrando, T. Matsushita, M. Rigby, O. Ruskeⁱ, M. R. Sutton, and R. Walczak
Department of Physics, University of Oxford, Oxford, United Kingdom

R. Brugnera, R. Carlin, F. Dal Corso, S. Dusini, A. Garfagnini, S. Limentani, A. Longhin, A. Parenti, M. Posocco, L. Stanco, and M. Turcato
Dipartimento di Fisica dell’ Università and INFN, Padova, Italy

L. Adamczyk, B. Y. Oh, and P. R. B. Saull
Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802

Y. Iga
Polytechnic University, Sagamihara, Japan

G. D’Agostini, G. Marini, and A. Nigro
Dipartimento di Fisica, Università “La Sapienza” and INFN, Rome, Italy

C. Cormack, J. C. Hart, and N. A. McCubbin
Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, United Kingdom

C. Heusch
University of California, Santa Cruz, California 95064

I. H. Park
Seoul National University, Seoul, Korea

N. Pavel
Fachbereich Physik der Universität-Gesamthochschule Siegen, Germany

H. Abramowicz, S. Dagan, A. Gabareen, S. Kananov, A. Kreisel, and A. Levy
Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel-Aviv University, Tel-Aviv, Israel

T. Abe, T. Fusayasu, T. Kohno, K. Umemori, and T. Yamashita
Department of Physics, University of Tokyo, Tokyo, Japan

R. Hamatsu, T. Hirose, M. Inuzuka, S. Kitamura^j, K. Matsuzawa, and T. Nishimura
Department of Physics, Tokyo Metropolitan University, Tokyo, Japan

M. Arneodo^k, N. Cartiglia, R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, V. Monaco, C. Peroni, M. Ruspa, R. Sacchi, A. Solano, and A. Staiano
Università di Torino, Dipartimento di Fisica Sperimentale and INFN, Torino, Italy

R. Galea, T. Koop, G. M. Levman, J. F. Martin, A. Mirea, and A. Sabetfakhri
Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S 1A7

J. M. Butterworth, C. Gwenlan, R. Hall-Wilton, M. E. Hayes^l, E. A. Heaphy, T. W. Jones, J. B. Lane, M. S. Lightwood, and B. J. West
Physics and Astronomy Department, University College London, London, United Kingdom

J. Ciborowski^m, R. Ciesielski, G. Grzelak, R. J. Nowak, J. M. Pawlak, B. Smalska, J. Sztukⁿ, T. Tymieniecka, A. Ukleja, J. Ukleja, J. A. Zakrzewski, and A. F. Żarnecki
Warsaw University, Institute of Experimental Physics, Warsaw, Poland

M. Adamus and P. Plucinski
Institute for Nuclear Studies, Warsaw, Poland

Y. Eisenberg, L. K. Gladilin^o, D. Hochman, and U. Karshon
Department of Particle Physics, Weizmann Institute, Rehovot, Israel

J. Breitweg^p, D. Chapin, R. Cross, D. Kçira, S. Lammers, D. D. Reeder, A. A. Savin, and W. H. Smith
Department of Physics, University of Wisconsin, Madison, Wisconsin 53706

A. Deshpande, S. Dhawan, V. W. Hughes, and P. B. Straub
Department of Physics, Yale University, New Haven, Connecticut 06520-8121

S. Bhadra, C. D. Catterall, S. Fourletov, S. Menary, M. Soares, and J. Standage
Department of Physics, York University, Ontario, Canada M3J 1P3

(Zeus Collaboration)

^*Now at Cornell University, Ithaca, N.Y.

^†On leave of absence at University of Erlangen-Nürnberg, Germany.

^‡Now at Dongshin University, Naju, Korea.

^§Now at Northwestern University, Evanston, IL.

^**Also at Department of Computer Science, Jagellonian University, Cracow, Poland.

^††Now at Fermilab, Batavia, IL.

^‡‡Now at DESY group MPY.

^aNow at Philips Semiconductors, Hamburg, Germany.

^bNow at Brookhaven National Laboratory, Upton, N.Y.

^cOn leave from Penn State University, University Park, PA.

^dNow at Mobilcom AG, Rendsburg-Büdelsdorf, Germany.

^eNow at GFN Training GmbH, Hamburg, Germany.

^fAlso at University of the Aegean, Mytilene, Greece.

^gAlso at University of Tokyo, Tokyo, Japan.

^hNow at Loma Linda University, Loma Linda, CA.

ⁱNow at IBM Global Services, Frankfurt au Main, Germany.

^jPresent address: Tokyo Metropolitan University of Health Sciences, Tokyo 116-8551, Japan.

^kAlso at Università del Piemonte Orientale, Novara, Italy.

^lNow at CERN, Geneva, Switzerland.

^mAlso at Łódź University, Lódź, Poland.

ⁿAlso at Łódź University, Lódź, Poland.

^oOn leave from MSU.

^pNow at EssNet Deutschland GmbH, Hamburg, Germany.