Year: 2002
Type: article
Abstract: A search has been made for lepton-flavor-violating interactions of the type ${e}^{+}\stackrel{\ensuremath{\rightarrow}}{p}lX,$ where l denotes a \ensuremath{\mu} or \ensuremath{\tau} with high transverse momentum, at a center-of-mass energy $\sqrt{s}$ of 300 GeV with an integrated luminosity of 47.7 ${\mathrm{pb}}^{\mathrm{\ensuremath{-}}1}$ using the ZEUS detector at HERA. No evidence was found for lepton-flavor violation and constraints were derived on leptoquarks (LQs) that could mediate such interactions. For LQ masses below $\sqrt{s},$ limits are set on ${\ensuremath{\lambda}}_{{\mathrm{eq}}_{1}}$ $\sqrt{{\ensuremath{\beta}}_{\mathrm{lq}}},$ where ${\ensuremath{\lambda}}_{{\mathrm{eq}}_{1}}$ is the coupling of the LQ to an electron and a first-generation quark ${q}_{1}$ and ${\ensuremath{\beta}}_{\mathrm{lq}}$ is the branching ratio of the LQ to l and a quark. For LQ masses exceeding $\sqrt{s},$ limits are set on the four-fermion contact-interaction term ${\ensuremath{\lambda}}_{{\mathrm{eq}}_{\ensuremath{\alpha}}}$ ${\ensuremath{\lambda}}_{{\mathrm{lq}}_{\ensuremath{\beta}}}{/M}_{\mathrm{LQ}}^{2}$ for leptoquarks that couple to an electron and a quark ${q}_{\ensuremath{\alpha}}$ and also to l and a quark ${q}_{\ensuremath{\beta}}.$ Some of the limits are also applicable to lepton-flavor-violating processes mediated by squarks in R-parity-violating supersymmetric models. In some cases involving heavy quarks and especially for $l=\ensuremath{\tau},$ the ZEUS limits are the most stringent published to date.
Authors: S. Chekanov, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, A. Pellegrino, J. Repond, R. Yoshida, M. C. K. Mattingly, 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, A. Zichichi, 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, H. Wessoleck, 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, M. Wing, M. Capua, A. Mastroberardino, M. Schioppa, G. Susinno, H. Y. Jeoung, J. Y. Kim, J. H. Lee, I. T. Lim, K. J. Ma, M. Y. Pac, A. Caldwell, M. Helbich, X. Liu, B. Mellado, S. Paganis, W. B. Schmidke, F. Sciulli, J. Chwastowski, A. Eskreys, J. Figiel, K. Olkiewicz, M. B. Przybycień, P. Stopa, L. Zawiejski, 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, J. Szuba, A. Kotański, W. Słomiński, 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, M. Martínez, M. Moritz, D. Notz, M. C. Petrucci, A. Polini, U. Schneekloth, F. Selonke, S. Stonjek, B. Surrow, J. J. Whitmore, R. Wichmann, G. Wolf, C. Youngman, W. Zeuner, C. Coldewey, A. Lopez-Duran Viani, A. Meyer, S. Schlenstedt, G. Barbagli, E. Gallo, C. Genta, P. G. Pelfer, A. Bamberger, A. Benen, N. Coppola, P. Markun, H. Raach, S. Wölfle, M. Bell, P. J. Bussey, A. T. Doyle, C. Glasman, S. Hanlon, S. W. Lee, A. Lupi, G. J. McCance, D. H. Saxon, I. O. Skillicorn, B. Bodmann, U. Holm, H. Salehi, K. Wick, A. Ziegler, Ar. Ziegler, T. Carli, I. Gialas, K. Klimek, E. Lohrmann, M. Milite, C. Collins-Tooth, C. Foudas, R. Gonçalo, K. R. Long, F. Metlica, D. B. Miller, A. D. Tapper, R. Walker, P. Cloth, D. Filges, M. Kuze, K. Nagano, K. Tokushuku, S. Yamada, Y. Yamazaki, A. N. Barakbaev, E. G. Boos, N. S. Pokrovskiy, B. O. Zhautykov, S. H. Ahn, S. B. Lee, S. K. Park, H. Lim, D. Son, F. Barreiro, G. García, O. González, L. Labarga, J. del Peso, I. Redondo, J. Terrón, M. Vázquez, M. Barbi, A. Bertolin, F. Corriveau, A. Ochs, S. Padhi, D. G. Stairs, M. St-Laurent, T. Tsurugai, A. Antonov, V. Bashkirov, P. Danilov, B. A. Dolgoshein, D. Gladkov, V. Sosnovtsev, S. Suchkov, 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, S. A. Zotkin, 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, E. de Wolf, N. Brümmer, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, T. Y. Ling, S. Boogert, A. M. Cooper-Sarkar, R. C. E. Devenish, J. Ferrando, T. Matsushita, M. Rigby, O. Ruske, M. R. Sutton, R. Walczak, R. Brugnera, R. Carlin, F. Dal Corso, S. Dusini, A. Garfagnini, S. Limentani, A. Longhin, A. Parenti, M. Posocco, L. Stanco, M. Turcato, L. Adamczyk, B. Y. Oh, P. R. B. Saull, Y. Iga, G. D’Agostini, G. Marini, A. Nigro, C. Cormack, J. C. Hart, N. A. McCubbin, C. Heusch, I. H. Park, N. Pavel, H. Abramowicz, S. Dagan, A. Gabareen, S. Kananov, A. Kreisel, A. Levy, T. Abe, T. Fusayasu, T. Kohno, K. Umemori, T. Yamashita, R. Hamatsu, T. Hirose, M. Inuzuka, S. Kitamura, K. Matsuzawa, T. Nishimura, M. Arneodo, N. Cartiglia, R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, V. Monaco, C. Peroni, M. Ruspa, R. Sacchi, A. Solano, A. Staiano, R. Galea, T. Koop, G. M. Levman, J. F. Martin, A. Mirea, A. Sabetfakhri, J. M. Butterworth, C. Gwenlan, R. Hall-Wilton, M. E. Hayes, E. A. Heaphy, T. W. Jones, J. B. Lane, M. S. Lightwood, B. J. West, J. Ciborowski, R. Ciesielski, G. Grzelak, R. J. Nowak, J. M. Pawlak, B. Smalska, J. Sztuk, T. Tymieniecka, A. Ukleja, J. Ukleja, J. A. Zakrzewski, A. F. Żarnecki, M. Adamus, P. Plucinski, Y. Eisenberg, L. K. Gladilin, D. Hochman, U. Karshon, J. Breitweg, D. Chapin, R. Cross, D. Kçira, S. Lammers, D. D. Reeder, A. A. Savin, W. H. Smith, A. Deshpande, S. Dhawan, V. W. Hughes, P. B. Straub, S. Bhadra, C. D. Catterall, S. Fourletov, S. Menary, M. Soares, J. Standage
Institutions: Argonne National Laboratory, Andrews University, University of Bristol, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Brookhaven National Laboratory, University of Łódź, University of Bonn, Chonnam National University, The University of Tokyo, University of Calabria, IBM (Germany), Tel Aviv University, Columbia University, Tokyo Metropolitan University, Institute of Nuclear Physics, Polish Academy of Sciences, AGH University of Krakow, Deutsches Elektronen-Synchrotron DESY, Friedrich-Alexander-Universität Erlangen-Nürnberg, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, University of Florence, University of Freiburg, University of Glasgow, Korea University, Pennsylvania State University, Universität Hamburg, Imperial College London, High Energy Accelerator Research Organization, Institute of Particle and Nuclear Studies, Forschungszentrum Jülich, Institute of Physics and Technology, Kyungpook National University, Universidad Autónoma de Madrid, Meiji Gakuin University, National Research Nuclear University MEPhI, McGill University, Jagiellonian University, Fermi National Accelerator Laboratory, Lomonosov Moscow State University, National Institute for Subatomic Physics, University of Amsterdam, The Ohio State University, University of Oxford, University of Padua, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Fisica Nucleare, Sezione di Roma I, Sapienza University of Rome, Rutherford Appleton Laboratory, Seoul National University, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, University of Turin, University of the Aegean, University of Toronto, University College London, University of Warsaw, Weizmann Institute of Science, Yale University, University of Wisconsin–Madison, United States-Israel Binational Science Foundation, York University, Cornell University
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, U.S. Department of Energy, Northwestern University, Strong, Ministry of Education, Culture, Sports, Science and Technology, Bundesministerium für Bildung und Forschung, Dongshin University, Korea Science and Engineering Foundation, Natural Sciences and Engineering Research Council of Canada, Deutsches Elektronen-Synchrotron, Fundação para a Ciência e a Tecnologia, High Energy Physics, Nuclear Physics
Award: G722491498
OpenAlex ID: W2152001570