Search for single top quark production in ep collisions at HERA

Aktas, A; Andreev, V; Anthonis, T; Asmone, A; Babaev, A; Backovic, S; Bahr, J; Baranov, P; Barrelet, E; Bartel, W; Baumgartner, S; Becker, J; Beckingham, M; Behnke, O; Behrendt, O; Belousov, A; Berger, Ch; Berndt, T; Bizot, JC; Bohme, J; Boenig, M-O; Boudry, V; Bracinik, J; Braunschweig, W; Brisson, V; Broker, H-B; Brown, DP; Bruncko, D; Busser, FW; Bunyatyan, A; Buschhorn, G; Bystritskaya, L; Campbell, AJ; Caron, S; Cassol-Brunner, F; Chekelian, V; Clarke, D; Collard, C; Contreras, JG; Coppens, YR; Coughlan, JA; Cousinou, M-C; Cox, BE; Cozzika, G; Cvach, J; Dainton, JB; Dau, WD; Daum, K; Delcourt, B; Delerue, N; Demirchyan, R; De Roeck, A; De Wolf, EA; Diaconu, C; Dingfelder, J; Dodonov, V; Dowell, JD; Dubak, A; Duprel, C; Eckerlin, G; Efremenko, V; Egli, S; Eichler, R; Eisele, F; Ellerbrock, M; Elsen, E; Erdmann, M; Erdmann, W; Faulkner, PJW; Favart, L; Fedotov, A; Felst, R; Ferencei, J; Fleischer, M; Fleischmann, P; Fleming, YH; Flucke, G; Flugge, G; Fomenko, A; Foresti, I; Formanek, J; Franke, G; Frising, G; Gabathuler, E; Gabathuler, K; Garvey, J; Gassner, J; Gayler, J; Gerhards, R; Gerlich, C; Ghazaryan, S; Goerlich, L; Gogitidze, N; Gorbounov, S; Grab, C; Grabski, V; Grassler, H; Greenshaw, T; Gregori, M; Grindhammer, G; Haidt, D; Hajduk, L; Haller, J; Heinzelmann, G; Henderson, RCW; Henschel, H; Henshaw, O; Heremans, R; Herrera, G; Herynek, I; Hildebrandt, M; Hiller, KH; Hladky, J; Hoting, P; Hoffmann, D; Horisberger, R; Hovhannisyan, A; Ibbotson, M; Jacquet, M; Janauschek, L; Janssen, X; Jemanov, V; Jonsson, L; Johnson, C; Johnson, DP; Jung, H; Kant, D; Kapichine, M; Karlsson, M; Katzy, J; Keil, F; Keller, N; Kennedy, J; Kenyon, IR; Kiesling, C; Klein, M; Kleinwort, C; Kluge, T; Knies, G; Koblitz, B; Kolya, SD; Korbel, V; Kostka, P; Koutouev, R; Kropivnitskaya, A; Kroseberg, J; Kueckens, J; Kuhr, T; Landon, MPJ; Lange, W; Lastovicka, T; Laycock, P; Lebedev, A; Leibner, B; Lemrani, R; Lendermann, V; Levonian, S; List, B; Lobodzinska, E; Loktionova, N; Lopez-Fernandez, R; Lubimov, V; Lueders, H; Laders, S; Luke, D; Lytkin, L; Makankine, A; Malden, N; Malinovski, E; Mangano, S; Marage, P; Marks, J; Marshall, R; Martyn, H-U; Martyniak, J; Maxfield, SJ; Meer, D; Mehta, A; Meier, K; Meyer, AB; Meyer, H; Meyer, J; Michine, S; Mikocki, S; Milstead, D; Moreau, F; Morozov, A; Morris, JV; Muller, K; Murin, P; Nagovizin, V; Naroska, B; Naumann, J; Naumann, Th; Newman, PR; Niebergall, F; Niebuhr, C; Nikitin, D; Nowak, G; Nozicka, M; Olivier, B; Olsson, JE; Ozerov, D; Pascaud, C; Patel, GD; Peez, M; Perez, E; Petrukhin, A; Pitzl, D; Poschl, R; Povh, B; Raicevic, N; Rauschenberger, J; Reimer, P; Reisert, B; Risler, C; Rizvi, E; Robmann, P; Roosen, R; Rostovtsev, A; Rusakov, S; Rybicki, K; Sankey, DPC; Sauvan, E; Schatzel, S; Scheins, J; Schilling, F-P; Schleper, P; Schmidt, D; Schmidt, S; Schmitt, S; Schneider, M; Schoeffel, L; Schoning, A; Schroder, V; Schultz-Coulon, H-C; Schwanenberger, C; Sedlak, K; Sefkow, F; Sheviakov, I; Shtarkov, LN; Sirois, Y; Sloan, T; Smirnov, P; Soloviev, Y; South, D; Spaskov, V; Specka, A; Spitzer, H; Stamen, R; Stella, B; Stiewe, J; Strauch, I; Straumann, U; Thompson, G; Thompson, PD; Tomasz, F; Traynor, D; Truol, P; Tsipolitis, G; Tsurin, I; Turnau, J; Turney, JE; Tzamariudaki, E; Uraev, A; Urban, M; Usik, A; Valkar, S; Valkarova, A; Vallee, C; Van Mechelen, P; Vargas Trevino, A; Vassiliev, S; Vazdik, Y; Veelken, C; Vest, A; Vichnevski, A; Volchinski, V; Wacker, K; Wagner, J; Waugh, B; Weber, G; Weber, R; Wegener, D; Werner, C; Werner, N; Wessels, M; Wessling, B; Winde, M; Winter, G-G; Wissing, Ch; Woehrling, E-E; Wunsch, E; Zacek, J; Zalesak, J; Zhang, Z; Zhokin, A; Zomer, F; Zur Nedden, M

dc.contributor.author	Aktas, A	en
dc.contributor.author	Andreev, V	en
dc.contributor.author	Anthonis, T	en
dc.contributor.author	Asmone, A	en
dc.contributor.author	Babaev, A	en
dc.contributor.author	Backovic, S	en
dc.contributor.author	Bahr, J	en
dc.contributor.author	Baranov, P	en
dc.contributor.author	Barrelet, E	en
dc.contributor.author	Bartel, W	en
dc.contributor.author	Baumgartner, S	en
dc.contributor.author	Becker, J	en
dc.contributor.author	Beckingham, M	en
dc.contributor.author	Behnke, O	en
dc.contributor.author	Behrendt, O	en
dc.contributor.author	Belousov, A	en
dc.contributor.author	Berger, Ch	en
dc.contributor.author	Berndt, T	en
dc.contributor.author	Bizot, JC	en
dc.contributor.author	Bohme, J	en
dc.contributor.author	Boenig, M-O	en
dc.contributor.author	Boudry, V	en
dc.contributor.author	Bracinik, J	en
dc.contributor.author	Braunschweig, W	en
dc.contributor.author	Brisson, V	en
dc.contributor.author	Broker, H-B	en
dc.contributor.author	Brown, DP	en
dc.contributor.author	Bruncko, D	en
dc.contributor.author	Busser, FW	en
dc.contributor.author	Bunyatyan, A	en
dc.contributor.author	Buschhorn, G	en
dc.contributor.author	Bystritskaya, L	en
dc.contributor.author	Campbell, AJ	en
dc.contributor.author	Caron, S	en
dc.contributor.author	Cassol-Brunner, F	en
dc.contributor.author	Chekelian, V	en
dc.contributor.author	Clarke, D	en
dc.contributor.author	Collard, C	en
dc.contributor.author	Contreras, JG	en
dc.contributor.author	Coppens, YR	en
dc.contributor.author	Coughlan, JA	en
dc.contributor.author	Cousinou, M-C	en
dc.contributor.author	Cox, BE	en
dc.contributor.author	Cozzika, G	en
dc.contributor.author	Cvach, J	en
dc.contributor.author	Dainton, JB	en
dc.contributor.author	Dau, WD	en
dc.contributor.author	Daum, K	en
dc.contributor.author	Delcourt, B	en
dc.contributor.author	Delerue, N	en
dc.contributor.author	Demirchyan, R	en
dc.contributor.author	De Roeck, A	en
dc.contributor.author	De Wolf, EA	en
dc.contributor.author	Diaconu, C	en
dc.contributor.author	Dingfelder, J	en
dc.contributor.author	Dodonov, V	en
dc.contributor.author	Dowell, JD	en
dc.contributor.author	Dubak, A	en
dc.contributor.author	Duprel, C	en
dc.contributor.author	Eckerlin, G	en
dc.contributor.author	Efremenko, V	en
dc.contributor.author	Egli, S	en
dc.contributor.author	Eichler, R	en
dc.contributor.author	Eisele, F	en
dc.contributor.author	Ellerbrock, M	en
dc.contributor.author	Elsen, E	en
dc.contributor.author	Erdmann, M	en
dc.contributor.author	Erdmann, W	en
dc.contributor.author	Faulkner, PJW	en
dc.contributor.author	Favart, L	en
dc.contributor.author	Fedotov, A	en
dc.contributor.author	Felst, R	en
dc.contributor.author	Ferencei, J	en
dc.contributor.author	Fleischer, M	en
dc.contributor.author	Fleischmann, P	en
dc.contributor.author	Fleming, YH	en
dc.contributor.author	Flucke, G	en
dc.contributor.author	Flugge, G	en
dc.contributor.author	Fomenko, A	en
dc.contributor.author	Foresti, I	en
dc.contributor.author	Formanek, J	en
dc.contributor.author	Franke, G	en
dc.contributor.author	Frising, G	en
dc.contributor.author	Gabathuler, E	en
dc.contributor.author	Gabathuler, K	en
dc.contributor.author	Garvey, J	en
dc.contributor.author	Gassner, J	en
dc.contributor.author	Gayler, J	en
dc.contributor.author	Gerhards, R	en
dc.contributor.author	Gerlich, C	en
dc.contributor.author	Ghazaryan, S	en
dc.contributor.author	Goerlich, L	en
dc.contributor.author	Gogitidze, N	en
dc.contributor.author	Gorbounov, S	en
dc.contributor.author	Grab, C	en
dc.contributor.author	Grabski, V	en
dc.contributor.author	Grassler, H	en
dc.contributor.author	Greenshaw, T	en
dc.contributor.author	Gregori, M	en
dc.contributor.author	Grindhammer, G	en
dc.contributor.author	Haidt, D	en
dc.contributor.author	Hajduk, L	en
dc.contributor.author	Haller, J	en
dc.contributor.author	Heinzelmann, G	en
dc.contributor.author	Henderson, RCW	en
dc.contributor.author	Henschel, H	en
dc.contributor.author	Henshaw, O	en
dc.contributor.author	Heremans, R	en
dc.contributor.author	Herrera, G	en
dc.contributor.author	Herynek, I	en
dc.contributor.author	Hildebrandt, M	en
dc.contributor.author	Hiller, KH	en
dc.contributor.author	Hladky, J	en
dc.contributor.author	Hoting, P	en
dc.contributor.author	Hoffmann, D	en
dc.contributor.author	Horisberger, R	en
dc.contributor.author	Hovhannisyan, A	en
dc.contributor.author	Ibbotson, M	en
dc.contributor.author	Jacquet, M	en
dc.contributor.author	Janauschek, L	en
dc.contributor.author	Janssen, X	en
dc.contributor.author	Jemanov, V	en
dc.contributor.author	Jonsson, L	en
dc.contributor.author	Johnson, C	en
dc.contributor.author	Johnson, DP	en
dc.contributor.author	Jung, H	en
dc.contributor.author	Kant, D	en
dc.contributor.author	Kapichine, M	en
dc.contributor.author	Karlsson, M	en
dc.contributor.author	Katzy, J	en
dc.contributor.author	Keil, F	en
dc.contributor.author	Keller, N	en
dc.contributor.author	Kennedy, J	en
dc.contributor.author	Kenyon, IR	en
dc.contributor.author	Kiesling, C	en
dc.contributor.author	Klein, M	en
dc.contributor.author	Kleinwort, C	en
dc.contributor.author	Kluge, T	en
dc.contributor.author	Knies, G	en
dc.contributor.author	Koblitz, B	en
dc.contributor.author	Kolya, SD	en
dc.contributor.author	Korbel, V	en
dc.contributor.author	Kostka, P	en
dc.contributor.author	Koutouev, R	en
dc.contributor.author	Kropivnitskaya, A	en
dc.contributor.author	Kroseberg, J	en
dc.contributor.author	Kueckens, J	en
dc.contributor.author	Kuhr, T	en
dc.contributor.author	Landon, MPJ	en
dc.contributor.author	Lange, W	en
dc.contributor.author	Lastovicka, T	en
dc.contributor.author	Laycock, P	en
dc.contributor.author	Lebedev, A	en
dc.contributor.author	Leibner, B	en
dc.contributor.author	Lemrani, R	en
dc.contributor.author	Lendermann, V	en
dc.contributor.author	Levonian, S	en
dc.contributor.author	List, B	en
dc.contributor.author	Lobodzinska, E	en
dc.contributor.author	Loktionova, N	en
dc.contributor.author	Lopez-Fernandez, R	en
dc.contributor.author	Lubimov, V	en
dc.contributor.author	Lueders, H	en
dc.contributor.author	Laders, S	en
dc.contributor.author	Luke, D	en
dc.contributor.author	Lytkin, L	en
dc.contributor.author	Makankine, A	en
dc.contributor.author	Malden, N	en
dc.contributor.author	Malinovski, E	en
dc.contributor.author	Mangano, S	en
dc.contributor.author	Marage, P	en
dc.contributor.author	Marks, J	en
dc.contributor.author	Marshall, R	en
dc.contributor.author	Martyn, H-U	en
dc.contributor.author	Martyniak, J	en
dc.contributor.author	Maxfield, SJ	en
dc.contributor.author	Meer, D	en
dc.contributor.author	Mehta, A	en
dc.contributor.author	Meier, K	en
dc.contributor.author	Meyer, AB	en
dc.contributor.author	Meyer, H	en
dc.contributor.author	Meyer, J	en
dc.contributor.author	Michine, S	en
dc.contributor.author	Mikocki, S	en
dc.contributor.author	Milstead, D	en
dc.contributor.author	Moreau, F	en
dc.contributor.author	Morozov, A	en
dc.contributor.author	Morris, JV	en
dc.contributor.author	Muller, K	en
dc.contributor.author	Murin, P	en
dc.contributor.author	Nagovizin, V	en
dc.contributor.author	Naroska, B	en
dc.contributor.author	Naumann, J	en
dc.contributor.author	Naumann, Th	en
dc.contributor.author	Newman, PR	en
dc.contributor.author	Niebergall, F	en
dc.contributor.author	Niebuhr, C	en
dc.contributor.author	Nikitin, D	en
dc.contributor.author	Nowak, G	en
dc.contributor.author	Nozicka, M	en
dc.contributor.author	Olivier, B	en
dc.contributor.author	Olsson, JE	en
dc.contributor.author	Ozerov, D	en
dc.contributor.author	Pascaud, C	en
dc.contributor.author	Patel, GD	en
dc.contributor.author	Peez, M	en
dc.contributor.author	Perez, E	en
dc.contributor.author	Petrukhin, A	en
dc.contributor.author	Pitzl, D	en
dc.contributor.author	Poschl, R	en
dc.contributor.author	Povh, B	en
dc.contributor.author	Raicevic, N	en
dc.contributor.author	Rauschenberger, J	en
dc.contributor.author	Reimer, P	en
dc.contributor.author	Reisert, B	en
dc.contributor.author	Risler, C	en
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dc.contributor.author	Roosen, R	en
dc.contributor.author	Rostovtsev, A	en
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dc.contributor.author	Sankey, DPC	en
dc.contributor.author	Sauvan, E	en
dc.contributor.author	Schatzel, S	en
dc.contributor.author	Scheins, J	en
dc.contributor.author	Schilling, F-P	en
dc.contributor.author	Schleper, P	en
dc.contributor.author	Schmidt, D	en
dc.contributor.author	Schmidt, S	en
dc.contributor.author	Schmitt, S	en
dc.contributor.author	Schneider, M	en
dc.contributor.author	Schoeffel, L	en
dc.contributor.author	Schoning, A	en
dc.contributor.author	Schroder, V	en
dc.contributor.author	Schultz-Coulon, H-C	en
dc.contributor.author	Schwanenberger, C	en
dc.contributor.author	Sedlak, K	en
dc.contributor.author	Sefkow, F	en
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dc.contributor.author	Shtarkov, LN	en
dc.contributor.author	Sirois, Y	en
dc.contributor.author	Sloan, T	en
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dc.contributor.author	Specka, A	en
dc.contributor.author	Spitzer, H	en
dc.contributor.author	Stamen, R	en
dc.contributor.author	Stella, B	en
dc.contributor.author	Stiewe, J	en
dc.contributor.author	Strauch, I	en
dc.contributor.author	Straumann, U	en
dc.contributor.author	Thompson, G	en
dc.contributor.author	Thompson, PD	en
dc.contributor.author	Tomasz, F	en
dc.contributor.author	Traynor, D	en
dc.contributor.author	Truol, P	en
dc.contributor.author	Tsipolitis, G	en
dc.contributor.author	Tsurin, I	en
dc.contributor.author	Turnau, J	en
dc.contributor.author	Turney, JE	en
dc.contributor.author	Tzamariudaki, E	en
dc.contributor.author	Uraev, A	en
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dc.contributor.author	Usik, A	en
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dc.contributor.author	Valkarova, A	en
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dc.contributor.author	Vargas Trevino, A	en
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dc.contributor.author	Vazdik, Y	en
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dc.contributor.author	Vest, A	en
dc.contributor.author	Vichnevski, A	en
dc.contributor.author	Volchinski, V	en
dc.contributor.author	Wacker, K	en
dc.contributor.author	Wagner, J	en
dc.contributor.author	Waugh, B	en
dc.contributor.author	Weber, G	en
dc.contributor.author	Weber, R	en
dc.contributor.author	Wegener, D	en
dc.contributor.author	Werner, C	en
dc.contributor.author	Werner, N	en
dc.contributor.author	Wessels, M	en
dc.contributor.author	Wessling, B	en
dc.contributor.author	Winde, M	en
dc.contributor.author	Winter, G-G	en
dc.contributor.author	Wissing, Ch	en
dc.contributor.author	Woehrling, E-E	en
dc.contributor.author	Wunsch, E	en
dc.contributor.author	Zacek, J	en
dc.contributor.author	Zalesak, J	en
dc.contributor.author	Zhang, Z	en
dc.contributor.author	Zhokin, A	en
dc.contributor.author	Zomer, F	en
dc.contributor.author	Zur Nedden, M	en
dc.date.accessioned	2014-03-01T01:21:20Z
dc.date.available	2014-03-01T01:21:20Z
dc.date.issued	2004	en
dc.identifier.issn	1434-6044	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16206
dc.subject.classification	Physics, Particles & Fields	en
dc.subject.other	LIQUID ARGON CALORIMETER	en
dc.subject.other	MISSING TRANSVERSE-MOMENTUM	en
dc.subject.other	DEEP-INELASTIC-SCATTERING	en
dc.subject.other	HIGH-ENERGY-PHYSICS	en
dc.subject.other	PARTON DISTRIBUTIONS	en
dc.subject.other	E(+)E(-) COLLISIONS	en
dc.subject.other	PERTURBATION-THEORY	en
dc.subject.other	HADRON-COLLISIONS	en
dc.subject.other	BOSON PRODUCTION	en
dc.subject.other	LEADING ORDER	en
dc.title	Search for single top quark production in ep collisions at HERA	en
heal.type	journalArticle	en
heal.identifier.primary	10.1140/epjc/s2003-01588-2	en
heal.identifier.secondary	http://dx.doi.org/10.1140/epjc/s2003-01588-2	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	A search for single top quark production is performed in e(+/-) pcollisions at HERA. The search exploits data corresponding to an integrated luminosity of 118.3 pb(-1). A model for the anomalous production of top quarks in a flavour changing neutral current process involving a tugamma coupling is investigated. Decays of top quarks into a b quark and a W boson are considered in the leptonic and the hadronic decay channels of the W. Both a cut-based analysis and a multivariate likelihood analysis are performed to discriminate anomalous top quark production from Standard Model background processes. In the leptonic channel, 5 events are found while 1.31 +/- 0.22 events are expected from the Standard Model background. In the hadronic channel, no excess above the expectation for Standard Model processes is found. These observations lead to a cross section (ep --> e t X) = 0.29(-0.14)(+0.15) pb at roots = 319 GeV. Alternatively, assuming that the observed events are due to a statistical fluctuation, upper limits of 0.55 pb on the anomalous top production cross section and of 0.27 on the tugamma coupling k(tugamma) are established at the 95% confidence level.	en
heal.publisher	SPRINGER-VERLAG	en
heal.journalName	European Physical Journal C	en
dc.identifier.doi	10.1140/epjc/s2003-01588-2	en
dc.identifier.isi	ISI:000189173600002	en
dc.identifier.volume	33	en
dc.identifier.issue	1	en
dc.identifier.spage	9	en
dc.identifier.epage	22	en