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Search for single top quark production in ep collisions at HERA
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- (creator_code:org_t)
- Springer Science and Business Media LLC, 2004
- 2004
- English.
- In: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 33:1, s. 9-22
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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- Aktas, A
- Andreev, V
- Anthonis, T
- Asmone, A
- Babaev, A
- Backovic, S
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- Bahr, J
- Baranov, P
- Barrelet, E
- Bartel, W
- Baumgartner, S
- Becker, J
- Beckingham, M
- Behnke, O
- Behrendt, O
- Belousov, A
- Berger, C
- Berndt, T
- Bizot, JC
- Bohme, J
- Boenig, MO
- Boudry, V
- Bracinik, J
- Braunschweig, W
- Brisson, V
- Broker, HB
- Brown, DP
- Bruncko, D
- Busser, FW
- Bunyatyan, A
- Buschhorn, G
- Bystritskaya, L
- Campbell, AJ
- Caron, S
- Cassol-Brunner, ...
- Chekelian, V
- Clarke, D
- Collard, C
- Contreras, JG
- Coppens, YR
- Coughlan, JA
- Cousinou, MC
- 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
- Jönsson, Leif
- Johnson, C
- Johnson, DP
- Jung, Hannes
- Kant, D
- Kapichine, M
- Karlsson, Martin
- 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, ...
- Kroseberg, J
- Kueckens, J
- Kuhr, T
- Landon, MPJ
- Lange, W
- Lastovicka, T
- Laycock, P
- Lebedev, A
- Leissner, B
- Lemrani, R
- Lendermann, V
- Levonian, S
- List, B
- Lobodzinska, E
- Loktionova, N
- Lopez-Fernandez, ...
- Lubimov, V
- Lueders, H
- Luders, S
- Luke, D
- Lytkin, L
- Makankine, A
- Malden, N
- Malinovski, E
- Mangano, S
- Marage, P
- Marks, J
- Marshall, R
- Martyn, HU
- 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, T
- 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, ...
- 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, FP
- Schleper, P
- Schmidt, D
- Schmidt, S
- Schmitt, S
- Schneider, M
- Schoeffel, L
- Schoning, A
- Schroder, V
- Schultz-Coulon, ...
- Schwanenberger, ...
- 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
- Trevino, AV
- 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, GG
- Wissing, C
- Woehrling, EE
- Wunsch, E
- Zacek, J
- Zalesak, J
- Zhang, Z
- Zhokin, A
- Zomer, F
- zur Nedden, M
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