Isolated electrons and muons in events with missing transverse momentum at HERA

Andreev, V; Andrieu, B; Anthonis, T; Astvatsatourov, A; Babaev, A; Bahr, J; Baranov, P; Barrelet, E; Bartel, W; Baumgartner, S; Becker, J; Beckingham, M; Beglarian, A; Behnke, O; Belousov, A; Berger, C; Berndt, T; Bizot, JC; Bohme, J; Boudry, V; Bracinik, J; Braunschweig, W; Brisson, V; Broker, H-B; Brown, DP; Bruncko, D; Busser, FW; Bunyatyan, A; Burrage, 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; Davidsson, M; Delcourt, B; Delerue, N; Demirchyan, R; de Roeck, A; de Wolf, EA; Diaconu, C; Dingfelder, J; Dixon, P; Dodonov, V; Dowell, JD; Dubak, A; Duprel, C; Eckerlin, G; Eckstein, D; 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; Ferron, S; 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; Grindhammer, G; Haidt, D; Hajduk, L; Haller, J; Heinemann, B; Heinzelmann, G; Henderson, RCW; Henschel, H; Henshaw, O; Heremans, R; Herrera, G; Herynek, I; Hildebrandt, M; Hilgers, M; Hiller, KH; Hladky, J; Hoting, P; Hoffmann, D; Horisberger, R; Hovhannisyan, A; Ibbotson, M; Issever, C; Jacquet, M; Jaffre, M; Janauschek, L; Janssen, X; Jemanov, V; Jonsson, L; Johnson, C; Johnson, DP; Jones, MAS; Jung, H; Kant, D; Kapichine, M; Karlsson, M; Karschnick, O; Katzy, J; Keil, F; Keller, N; Kennedy, J; Kenyon, IR; Kiesling, C; Kjellberg, P; Klein, M; Kleinwort, C; Kluge, T; Knies, G; Koblitz, B; Kolya, SD; Korbel, V; Kostka, P; Koutouev, R; Koutov, A; Kroseberg, J; Kruger, K; 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; Lobodzinski, B; Loktionova, N; Lubimov, V; Luders, S; Luke, D; Lytkin, L; Maiden, 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; Mohrdieck, S; Mondragon, MN; Moreau, F; Morozov, A; Morris, JV; Muller, K; Murin, P; Nagovizin, V; Naroska, B; Naumann, J; Naumann, T; Newman, PR; Niebergall, F; Niebuhr, C; Nowak, G; Nozicka, M; Olivier, B; Olsson, JE; Ozerov, D; Panassik, V; Pascaud, C; Patel, GD; Peez, M; Perez, E; Petrukhin, A; Phillips, JP; Pitzl, D; Poschl, R; Potachnikova, I; Povh, B; 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, D; Schmidt, S; Schmitt, S; Schneider, M; Schoeffel, L; Schoning, A; Schorner-Sadenius, T; 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; Tchetchelnitski, S; 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; Wallny, R; Waugh, B; Weber, G; Weber, R; Wegener, D; Werner, C; Werner, N; Wessels, M; Wessling, B; Winde, M; Winter, G-G; Wissing, C; Woehrling, E-E; Wunsch, E; Wyatt, AC; Zacek, J; Zalesak, J; Zhang, Z; Zhokin, A; Zomer, F; zur Nedden, M

dc.contributor.author	Andreev, V	en
dc.contributor.author	Andrieu, B	en
dc.contributor.author	Anthonis, T	en
dc.contributor.author	Astvatsatourov, A	en
dc.contributor.author	Babaev, A	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	Beglarian, A	en
dc.contributor.author	Behnke, O	en
dc.contributor.author	Belousov, A	en
dc.contributor.author	Berger, C	en
dc.contributor.author	Berndt, T	en
dc.contributor.author	Bizot, JC	en
dc.contributor.author	Bohme, J	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	Burrage, A	en
dc.contributor.author	Buschhorn, G	en
dc.contributor.author	Bystritskaya, L	en
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dc.contributor.author	Zacek, J	en
dc.contributor.author	Zalesak, J	en
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dc.contributor.author	zur Nedden, M	en
dc.date.accessioned	2014-03-01T01:19:04Z
dc.date.available	2014-03-01T01:19:04Z
dc.date.issued	2003	en
dc.identifier.issn	0370-2693	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15367
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.other	proton	en
dc.subject.other	article	en
dc.subject.other	atomic particle	en
dc.subject.other	electron	en
dc.subject.other	energy	en
dc.subject.other	kinematics	en
dc.subject.other	luminance	en
dc.subject.other	model	en
dc.subject.other	molecular interaction	en
dc.subject.other	nuclear physics	en
dc.subject.other	standard	en
dc.title	Isolated electrons and muons in events with missing transverse momentum at HERA	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0370-2693(03)00497-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0370-2693(03)00497-0	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	A search for events with a high-energy isolated electron or muon and missing transverse momentum has been performed at the electron-proton collider HERA using an integrated luminosity of 13.6 pb(-1) in e(-) p scattering and 104.7 pb(-1) in e(+) p scattering. Within the Standard Model such events are expected to be mainly due to W boson production with subsequent leptonic decay. In e(-) p interactions one event is observed in the electron channel and none in the muon channel, consistent with the expectation of the Standard Model. In the e(+) p data a total of 18 events are seen in the electron and muon channels compared to an expectation of 12.4 +/- 1.7 dominated by W production (9.4 +/- 1.6). Whilst the overall observed number of events is broadly in agreement with the number predicted by the Standard Model, there is-an excess of events with transverse momentum of the hadronic system greater than 25 GeV with 10 events found compared to 2.9 +/- 0.5 expected. The results are used to determine the cross-section for events with an isolated electron or muon and missing transverse momentum. (C) 2003 Published by Elsevier Science B.V.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics	en
dc.identifier.doi	10.1016/S0370-2693(03)00497-0	en
dc.identifier.isi	ISI:000183005700006	en
dc.identifier.volume	561	en
dc.identifier.issue	3-4	en
dc.identifier.spage	241	en
dc.identifier.epage	257	en