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

V. Andreev; B. Andrieu; T. Anthonis; A. Astvatsatourov; A. Babaev; J. Bähr; P. Baranov; E. Barrelet; W. Bartel; S. Baumgartner; J. Becker; M. Beckingham; A. Beglarian; O. Behnke; A. Belousov; C. Berger; T. Berndt; J. C. Bizot; J. Böhme; V. Boudry; J. Bracinik; W. Braunschweig; V. Brisson; H. B. Broker; D. P. Brown; D. Bruncko; F. W. Büsser; A. Bunyatyan; A. Burrage; G. Buschhorn; L. Bystritskaya; A. J. Campbell; S. Caron; F. Cassol-Brunner; V. Chekelian; D. Clarke; C. Collard; J. G. Contreras; Y. R. Coppens; J. A. Coughlan; M. C. Cousinou; B. E. Cox; G. Cozzika; J. Cvach; J. B. Dainton; W. D. Dau; K. Daum; M. Davidsson; B. Delcourt; N. Delerue; R. Demirchyan; A. de Roeck; E. A. de Wolf; C. Diaconu; J. Dingfelder; P. Dixon; V. Dodonov; J. D. Dowell; A. Dubak; C. Duprel; G. Eckerlin; D. Eckstein; V. Efremenko; S. Egli; R. Eichler; F. Eisele; M. Ellerbrock; E. Elsen; M. Erdmann; W. Erdmann; P. J.W. Faulkner; L. Favart; A. Fedotov; R. Felst; J. Ferencei; S. Ferron; M. Fleischer; P. Fleischmann; Y. H. Fleming; G. Flucke; G. Flügge; A. Fomenko; I. Foresti; J. Formánek; G. Franke; G. Frising; E. Gabathuler; K. Gabathuler; J. Garvey; J. Gassner; J. Gayler; R. Gerhards; C. Gerlich; S. Ghazaryan; L. Goerlich; N. Gogitidze; S. Gorbounov; C. Grab; V. Grabski; H. Grässler; T. Greenshaw; G. Grindhammer; D. Haidt; L. Hajduk; J. Haller; B. Heinemann; G. Heinzelmann; R. C.W. Henderson; H. Henschel; O. Henshaw; R. Heremans; G. Herrera; I. Herynek; M. Hildebrandt; M. Hilgers; K. H. Hiller; J. Hladký; P. Höting; D. Hoffmann; R. Horisberger; A. Hovhannisyan; M. Ibbotson; C. Işsever; M. Jacquet; M. Jaffre; L. Janauschek; X. Janssen; V. Jemanov; L. Jönsson; C. Johnson; D. P. Johnson; M. A.S. Jones; H. Jung; D. Kant; M. Kapichine; M. Karlsson; O. Karschnick; J. Katzy; F. Keil; N. Keller; J. Kennedy; I. R. Kenyon; C. Kiesling; P. Kjellberg; M. Klein; C. Kleinwort; T. Kluge; G. Knies; B. Koblitz; S. D. Kolya; V. Korbel; P. Kostka; R. Koutouev; A. Koutov; J. Kroseberg; K. Krüger; J. Kueckens; T. Kuhr; M. P.J. Landon; W. Lange; T. Laštovicka; P. Laycock; A. Lebedev; B. Leißner; R. Lemrani; V. Lendermann; S. Levonian; B. List; E. Lobodzinska; B. Lobodzinski; N. Loktionova; V. Lubimov; S. Lüders; D. Lüke; L. Lytkin; N. Maiden; E. Malinovski; S. Mangano; P. Marage; J. Marks; R. Marshall; H. U. Martyn; J. Martyniak; S. J. Maxfield; D. Meer; A. Mehta; K. Meier; A. B. Meyer; H. Meyer; J. Meyer; S. Michine; S. Mikocki; D. Milstead; S. Mohrdieck; M. N. Mondragon; F. Moreau; A. Morozov; J. V. Morris; K. Müller; P. Murín; V. Nagovizin; B. Naroska; J. Naumann; T. Naumann; P. R. Newman; F. Niebergall; C. Niebuhr; G. Nowak; M. Nozicka; B. Olivier; J. E. Olsson; D. Ozerov; V. Panassik; C. Pascaud; G. D. Patel; M. Peez; E. Perez; A. Petrukhin; J. P. Phillips; D. Pitzl; R. Pöschl; I. Potachnikova; B. Povh; J. Rauschenberger; P. Reimer; B. Reisert; C. Risler; E. Rizvi; P. Robmann; R. Roosen; A. Rostovtsev; S. Rusakov; K. Rybicki; D. P.C. Sankey; E. Sauvan; S. Schätzel; J. Scheins; F. P. Schilling; P. Schleper; D. Schmidt; D. Schmidt; S. Schmidt; S. Schmitt; M. Schneider; L. Schoeffel; A. Schöning; T. Schörner-Sadenius; V. Schröder; H. C. Schultz-Coulon; C. Schwanenberger; K. Sedlák; F. Sefkow; I. Sheviakov; L. N. Shtarkov; Y. Sirois; T. Sloan; P. Smirnov; Y. Soloviev; D. South; V. Spaskov; A. Specka; H. Spitzer; R. Stamen; B. Stella; J. Stiewe; I. Strauch; U. Straumann; S. Tchetchelnitski; G. Thompson; P. D. Thompson; F. Tomasz; D. Traynor; P. Truöl; G. Tsipolitis; I. Tsurin; J. Turnau; J. E. Turney; E. Tzamariudaki; A. Uraev; M. Urban; A. Usik; S. Valkár; A. Valkárová; C. Vallée; P. van Mechelen; A. Vargas Trevino; S. Vassiliev; Y. Vazdik; C. Veelken; A. Vest; A. Vichnevski; V. Volchinski; K. Wacker; J. Wagner; R. Wallny; B. Waugh; G. Weber; R. Weber; D. Wegener; C. Werner; N. Werner; M. Wessels; B. Wessling; M. Winde; G. G. Winter; C. Wissing; E. E. Woehrling; E. Wünsch; A. C. Wyatt; J. Žácek; J. Zálešák; Z. Zhang; A. Zhokin; F. Zomer; M. zur Nedden

doi:10.1016/S0370-2693(03)00497-0

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

V. Andreev
, B. Andrieu
, T. Anthonis
, A. Astvatsatourov
, A. Babaev
, J. Bähr
, P. Baranov
, E. Barrelet
, W. Bartel
, S. Baumgartner
, J. Becker
, M. Beckingham
, A. Beglarian
, O. Behnke
, A. Belousov
, C. Berger
, T. Berndt
, J. C. Bizot
, J. Böhme
, V. Boudry

J. Bracinik, W. Braunschweig, V. Brisson, H. B. Broker, D. P. Brown, D. Bruncko, F. W. Büsser, A. Bunyatyan, A. Burrage, G. Buschhorn, L. Bystritskaya, A. J. Campbell, S. Caron, F. Cassol-Brunner, V. Chekelian, D. Clarke, C. Collard, J. G. Contreras, Y. R. Coppens, J. A. Coughlan, M. C. Cousinou, B. E. Cox, G. Cozzika, J. Cvach, J. B. Dainton, W. D. Dau, K. Daum, M. Davidsson, B. Delcourt, N. Delerue, R. Demirchyan, A. de Roeck, E. A. de Wolf, C. Diaconu, J. Dingfelder, P. Dixon, V. Dodonov, J. D. Dowell, A. Dubak, C. Duprel, G. Eckerlin, D. Eckstein, V. Efremenko, S. Egli, R. Eichler, F. Eisele, M. Ellerbrock, E. Elsen, M. Erdmann, W. Erdmann, P. J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Ferencei, S. Ferron, M. Fleischer, P. Fleischmann, Y. H. Fleming, G. Flucke, G. Flügge, A. Fomenko, I. Foresti, J. Formánek, G. Franke, G. Frising, E. Gabathuler, K. Gabathuler, J. Garvey, J. Gassner, J. Gayler, R. Gerhards, C. Gerlich, S. Ghazaryan, L. Goerlich, N. Gogitidze, S. Gorbounov, C. Grab, V. Grabski, H. Grässler, T. Greenshaw, G. Grindhammer, D. Haidt, L. Hajduk, J. Haller, B. Heinemann, G. Heinzelmann, R. C.W. Henderson, H. Henschel, O. Henshaw, R. Heremans, G. Herrera, I. Herynek, M. Hildebrandt, M. Hilgers, K. H. Hiller, J. Hladký, P. Höting, D. Hoffmann, R. Horisberger, A. Hovhannisyan, M. Ibbotson, C. Işsever, M. Jacquet, M. Jaffre, L. Janauschek, X. Janssen, V. Jemanov, L. Jönsson, C. Johnson, D. P. Johnson, M. A.S. Jones, H. Jung, D. Kant, M. Kapichine, M. Karlsson, O. Karschnick, J. Katzy, F. Keil, N. Keller, J. Kennedy, I. R. Kenyon, C. Kiesling, P. Kjellberg, M. Klein, C. Kleinwort, T. Kluge, G. Knies, B. Koblitz, S. D. Kolya, V. Korbel, P. Kostka, R. Koutouev, A. Koutov, J. Kroseberg, K. Krüger, J. Kueckens, T. Kuhr, M. P.J. Landon, W. Lange, T. Laštovicka, P. Laycock, A. Lebedev, B. Leißner, R. Lemrani, V. Lendermann, S. Levonian, B. List, E. Lobodzinska, B. Lobodzinski, N. Loktionova, V. Lubimov, S. Lüders, D. Lüke, L. Lytkin, N. Maiden, E. Malinovski, S. Mangano, P. Marage, J. Marks, R. Marshall, H. U. Martyn, J. Martyniak, S. J. Maxfield, D. Meer, A. Mehta, K. Meier, A. B. Meyer, H. Meyer, J. Meyer, S. Michine, S. Mikocki, D. Milstead, S. Mohrdieck, M. N. Mondragon, F. Moreau, A. Morozov, J. V. Morris, K. Müller, P. Murín, V. Nagovizin, B. Naroska, J. Naumann, T. Naumann, P. R. Newman, F. Niebergall, C. Niebuhr, G. Nowak, M. Nozicka, B. Olivier, J. E. Olsson, D. Ozerov, V. Panassik, C. Pascaud, G. D. Patel, M. Peez, E. Perez, A. Petrukhin, J. P. Phillips, D. Pitzl, R. Pöschl, I. Potachnikova, B. Povh, J. Rauschenberger, P. Reimer, B. Reisert, C. Risler, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, S. Rusakov, K. Rybicki, D. P.C. Sankey, E. Sauvan, S. Schätzel, J. Scheins, F. P. Schilling, P. Schleper, D. Schmidt, D. Schmidt, S. Schmidt, S. Schmitt, M. Schneider, L. Schoeffel, A. Schöning, T. Schörner-Sadenius, V. Schröder, H. C. Schultz-Coulon, C. Schwanenberger, K. Sedlák, F. Sefkow, I. Sheviakov, L. N. Shtarkov, Y. Sirois, T. Sloan, P. Smirnov, Y. Soloviev, D. South, V. Spaskov, A. Specka, H. Spitzer, R. Stamen, B. Stella, J. Stiewe, I. Strauch, U. Straumann, S. Tchetchelnitski, G. Thompson, P. D. Thompson, F. Tomasz, D. Traynor, P. Truöl, G. Tsipolitis, I. Tsurin, J. Turnau, J. E. Turney, E. Tzamariudaki, A. Uraev, M. Urban, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. van Mechelen, A. Vargas Trevino, S. Vassiliev, Y. Vazdik, C. Veelken, A. Vest, A. Vichnevski, V. Volchinski, K. Wacker, J. Wagner, R. Wallny, B. Waugh, G. Weber, R. Weber, D. Wegener, C. Werner, N. Werner, M. Wessels, B. Wessling, M. Winde, G. G. Winter, C. Wissing, E. E. Woehrling, E. Wünsch, A. C. Wyatt, J. Žácek, J. Zálešák, Z. Zhang, A. Zhokin, F. Zomer, M. zur Nedden

P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Inter-University Institute for High Energies ULB-VUB
c/o DESY
Institute for Theoretical and Experimental Physics
Universités Paris VI and VII
ETH Zurich
Physik-Institut der Universität Zürich
University of Manchester
Yerevan Physics Institute
University of Heidelberg
RWTH Aachen University
Laboratoire de l'Accélérateur Linéaire
Max-Planck-Institut für Physik
Institute of Experimental Physics Slovak Academy of Sciences
Universität Hamburg
Max-Planck-Institut für Kernphysik
University of Liverpool
Aix-Marseille Université
Dept. Fis. Ap. CINVESTAV
CCLRC Rutherford Appleton Laboratory
University of Dortmund
University of Birmingham
Institut Pierre Simon Laplace, CNRS and CEA
Institute of Physics of the Czech Academy of Sciences
Christian-Albrechts-University Kiel
Bergische Universität Gesamthochschule Wuppertal
Lund University
European Organization for Nuclear Research
Queen Mary University of London
Paul Scherrer Institut
Universität Karlsruhe/Forschungszentrum Karlsruhe
Charles University
Institute for Nuclear Physics
Lancaster University
CINVESTAV-IPN
Joint Institute for Nuclear Research, Dubna
University of P.J. Šafárik
University Roma Tre
National Technical University of Athens

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	241-257
Number of pages	17
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	561
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(03)00497-0
Publication status	Published - 29 May 2003

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10.1016/S0370-2693(03)00497-0

Cite this

Andreev, V., Andrieu, B., Anthonis, T., Astvatsatourov, A., Babaev, A., Bähr, J., Baranov, P., Barrelet, E., Bartel, W., Baumgartner, S., Becker, J., Beckingham, M., Beglarian, A., Behnke, O., Belousov, A., Berger, C., Berndt, T., Bizot, J. C., Böhme, J., ... zur Nedden, M. (2003). Isolated electrons and muons in events with missing transverse momentum at HERA. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 561(3-4), 241-257. https://doi.org/10.1016/S0370-2693(03)00497-0

@article{b57ff4999c834ff5b2b600ee7492db8e,

title = "Isolated electrons and muons in events with missing transverse momentum at HERA",

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.",

author = "V. Andreev and B. Andrieu and T. Anthonis and A. Astvatsatourov and A. Babaev and J. B{\"a}hr and P. Baranov and E. Barrelet and W. Bartel and S. Baumgartner and J. Becker and M. Beckingham and A. Beglarian and O. Behnke and A. Belousov and C. Berger and T. Berndt and Bizot, \{J. C.\} and J. B{\"o}hme and V. Boudry and J. Bracinik and W. Braunschweig and V. Brisson and Broker, \{H. B.\} and Brown, \{D. P.\} and D. Bruncko and B{\"u}sser, \{F. W.\} and A. Bunyatyan and A. Burrage and G. Buschhorn and L. Bystritskaya and Campbell, \{A. J.\} and S. Caron and F. Cassol-Brunner and V. Chekelian and D. Clarke and C. Collard and Contreras, \{J. G.\} and Coppens, \{Y. R.\} and Coughlan, \{J. A.\} and Cousinou, \{M. C.\} and Cox, \{B. E.\} and G. Cozzika and J. Cvach and Dainton, \{J. B.\} and Dau, \{W. D.\} and K. Daum and M. Davidsson and B. Delcourt and N. Delerue and R. Demirchyan and \{de Roeck\}, A. and \{de Wolf\}, \{E. A.\} and C. Diaconu and J. Dingfelder and P. Dixon and V. Dodonov and Dowell, \{J. D.\} and A. Dubak and C. Duprel and G. Eckerlin and D. Eckstein and V. Efremenko and S. Egli and R. Eichler and F. Eisele and M. Ellerbrock and E. Elsen and M. Erdmann and W. Erdmann and Faulkner, \{P. J.W.\} and L. Favart and A. Fedotov and R. Felst and J. Ferencei and S. Ferron and M. Fleischer and P. Fleischmann and Fleming, \{Y. H.\} and G. Flucke and G. Fl{\"u}gge and A. Fomenko and I. Foresti and J. Form{\'a}nek and G. Franke and G. Frising and E. Gabathuler and K. Gabathuler and J. Garvey and J. Gassner and J. Gayler and R. Gerhards and C. Gerlich and S. Ghazaryan and L. Goerlich and N. Gogitidze and S. Gorbounov and C. Grab and V. Grabski and H. Gr{\"a}ssler and T. Greenshaw and G. Grindhammer and D. Haidt and L. Hajduk and J. Haller and B. Heinemann and G. Heinzelmann and Henderson, \{R. C.W.\} and H. Henschel and O. Henshaw and R. Heremans and G. Herrera and I. Herynek and M. Hildebrandt and M. Hilgers and Hiller, \{K. H.\} and J. Hladk{\'y} and P. H{\"o}ting and D. Hoffmann and R. Horisberger and A. Hovhannisyan and M. Ibbotson and C. I{\c s}sever and M. Jacquet and M. Jaffre and L. Janauschek and X. Janssen and V. Jemanov and L. J{\"o}nsson and C. Johnson and Johnson, \{D. P.\} and Jones, \{M. A.S.\} and H. Jung and D. Kant and M. Kapichine and M. Karlsson and O. Karschnick and J. Katzy and F. Keil and N. Keller and J. Kennedy and Kenyon, \{I. R.\} and C. Kiesling and P. Kjellberg and M. Klein and C. Kleinwort and T. Kluge and G. Knies and B. Koblitz and Kolya, \{S. D.\} and V. Korbel and P. Kostka and R. Koutouev and A. Koutov and J. Kroseberg and K. Kr{\"u}ger and J. Kueckens and T. Kuhr and Landon, \{M. P.J.\} and W. Lange and T. La{\v s}tovicka and P. Laycock and A. Lebedev and B. Lei{\ss}ner and R. Lemrani and V. Lendermann and S. Levonian and B. List and E. Lobodzinska and B. Lobodzinski and N. Loktionova and V. Lubimov and S. L{\"u}ders and D. L{\"u}ke and L. Lytkin and N. Maiden and E. Malinovski and S. Mangano and P. Marage and J. Marks and R. Marshall and Martyn, \{H. U.\} and J. Martyniak and Maxfield, \{S. J.\} and D. Meer and A. Mehta and K. Meier and Meyer, \{A. B.\} and H. Meyer and J. Meyer and S. Michine and S. Mikocki and D. Milstead and S. Mohrdieck and Mondragon, \{M. N.\} and F. Moreau and A. Morozov and Morris, \{J. V.\} and K. M{\"u}ller and P. Mur{\'i}n and V. Nagovizin and B. Naroska and J. Naumann and T. Naumann and Newman, \{P. R.\} and F. Niebergall and C. Niebuhr and G. Nowak and M. Nozicka and B. Olivier and Olsson, \{J. E.\} and D. Ozerov and V. Panassik and C. Pascaud and Patel, \{G. D.\} and M. Peez and E. Perez and A. Petrukhin and Phillips, \{J. P.\} and D. Pitzl and R. P{\"o}schl and I. Potachnikova and B. Povh and J. Rauschenberger and P. Reimer and B. Reisert and C. Risler and E. Rizvi and P. Robmann and R. Roosen and A. Rostovtsev and S. Rusakov and K. Rybicki and Sankey, \{D. P.C.\} and E. Sauvan and S. Sch{\"a}tzel and J. Scheins and Schilling, \{F. P.\} and P. Schleper and D. Schmidt and D. Schmidt and S. Schmidt and S. Schmitt and M. Schneider and L. Schoeffel and A. Sch{\"o}ning and T. Sch{\"o}rner-Sadenius and V. Schr{\"o}der and Schultz-Coulon, \{H. C.\} and C. Schwanenberger and K. Sedl{\'a}k and F. Sefkow and I. Sheviakov and Shtarkov, \{L. N.\} and Y. Sirois and T. Sloan and P. Smirnov and Y. Soloviev and D. South and V. Spaskov and A. Specka and H. Spitzer and R. Stamen and B. Stella and J. Stiewe and I. Strauch and U. Straumann and S. Tchetchelnitski and G. Thompson and Thompson, \{P. D.\} and F. Tomasz and D. Traynor and P. Tru{\"o}l and G. Tsipolitis and I. Tsurin and J. Turnau and Turney, \{J. E.\} and E. Tzamariudaki and A. Uraev and M. Urban and A. Usik and S. Valk{\'a}r and A. Valk{\'a}rov{\'a} and C. Vall{\'e}e and \{van Mechelen\}, P. and \{Vargas Trevino\}, A. and S. Vassiliev and Y. Vazdik and C. Veelken and A. Vest and A. Vichnevski and V. Volchinski and K. Wacker and J. Wagner and R. Wallny and B. Waugh and G. Weber and R. Weber and D. Wegener and C. Werner and N. Werner and M. Wessels and B. Wessling and M. Winde and Winter, \{G. G.\} and C. Wissing and Woehrling, \{E. E.\} and E. W{\"u}nsch and Wyatt, \{A. C.\} and J. {\v Z}{\'a}cek and J. Z{\'a}le{\v s}{\'a}k and Z. Zhang and A. Zhokin and F. Zomer and \{zur Nedden\}, M.",

year = "2003",

month = may,

day = "29",

doi = "10.1016/S0370-2693(03)00497-0",

language = "English",

volume = "561",

pages = "241--257",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

number = "3-4",

}

Andreev, V, Andrieu, B, Anthonis, T, Astvatsatourov, A, Babaev, A, Bähr, 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, Böhme, J, Boudry, V, Bracinik, J, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruncko, D, Büsser, 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, MC, 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, Flügge, G, Fomenko, A, Foresti, I, Formánek, 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, Grässler, 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, Hladký, J, Höting, P, Hoffmann, D, Horisberger, R, Hovhannisyan, A, Ibbotson, M, Işsever, C, Jacquet, M, Jaffre, M, Janauschek, L, Janssen, X, Jemanov, V, Jönsson, 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, Krüger, K, Kueckens, J, Kuhr, T, Landon, MPJ, Lange, W, Laštovicka, T, Laycock, P, Lebedev, A, Leißner, B, Lemrani, R, Lendermann, V, Levonian, S, List, B, Lobodzinska, E, Lobodzinski, B, Loktionova, N, Lubimov, V, Lüders, S, Lüke, D, Lytkin, L, Maiden, 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, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Müller, K, Murín, 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, Pöschl, 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, Schätzel, S, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmidt, D, Schmidt, S, Schmitt, S, Schneider, M, Schoeffel, L, Schöning, A, Schörner-Sadenius, T, Schröder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlák, 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, Truöl, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Uraev, A, Urban, M, Usik, A, Valkár, S, Valkárová, A, Vallée, 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, GG, Wissing, C, Woehrling, EE, Wünsch, E, Wyatt, AC, Žácek, J, Zálešák, J, Zhang, Z, Zhokin, A, Zomer, F & zur Nedden, M 2003, 'Isolated electrons and muons in events with missing transverse momentum at HERA', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 561, no. 3-4, pp. 241-257. https://doi.org/10.1016/S0370-2693(03)00497-0

TY - JOUR

T1 - Isolated electrons and muons in events with missing transverse momentum at HERA

AU - Andreev, V.

AU - Andrieu, B.

AU - Anthonis, T.

AU - Astvatsatourov, A.

AU - Babaev, A.

AU - Bähr, J.

AU - Baranov, P.

AU - Barrelet, E.

AU - Bartel, W.

AU - Baumgartner, S.

AU - Becker, J.

AU - Beckingham, M.

AU - Beglarian, A.

AU - Behnke, O.

AU - Belousov, A.

AU - Berger, C.

AU - Berndt, T.

AU - Bizot, J. C.

AU - Böhme, J.

AU - Boudry, V.

AU - Bracinik, J.

AU - Braunschweig, W.

AU - Brisson, V.

AU - Broker, H. B.

AU - Brown, D. P.

AU - Bruncko, D.

AU - Büsser, F. W.

AU - Bunyatyan, A.

AU - Burrage, A.

AU - Buschhorn, G.

AU - Bystritskaya, L.

AU - Campbell, A. J.

AU - Caron, S.

AU - Cassol-Brunner, F.

AU - Chekelian, V.

AU - Clarke, D.

AU - Collard, C.

AU - Contreras, J. G.

AU - Coppens, Y. R.

AU - Coughlan, J. A.

AU - Cousinou, M. C.

AU - Cox, B. E.

AU - Cozzika, G.

AU - Cvach, J.

AU - Dainton, J. B.

AU - Dau, W. D.

AU - Daum, K.

AU - Davidsson, M.

AU - Delcourt, B.

AU - Delerue, N.

AU - Demirchyan, R.

AU - de Roeck, A.

AU - de Wolf, E. A.

AU - Diaconu, C.

AU - Dingfelder, J.

AU - Dixon, P.

AU - Dodonov, V.

AU - Dowell, J. D.

AU - Dubak, A.

AU - Duprel, C.

AU - Eckerlin, G.

AU - Eckstein, D.

AU - Efremenko, V.

AU - Egli, S.

AU - Eichler, R.

AU - Eisele, F.

AU - Ellerbrock, M.

AU - Elsen, E.

AU - Erdmann, M.

AU - Erdmann, W.

AU - Faulkner, P. J.W.

AU - Favart, L.

AU - Fedotov, A.

AU - Felst, R.

AU - Ferencei, J.

AU - Ferron, S.

AU - Fleischer, M.

AU - Fleischmann, P.

AU - Fleming, Y. H.

AU - Flucke, G.

AU - Flügge, G.

AU - Fomenko, A.

AU - Foresti, I.

AU - Formánek, J.

AU - Franke, G.

AU - Frising, G.

AU - Gabathuler, E.

AU - Gabathuler, K.

AU - Garvey, J.

AU - Gassner, J.

AU - Gayler, J.

AU - Gerhards, R.

AU - Gerlich, C.

AU - Ghazaryan, S.

AU - Goerlich, L.

AU - Gogitidze, N.

AU - Gorbounov, S.

AU - Grab, C.

AU - Grabski, V.

AU - Grässler, H.

AU - Greenshaw, T.

AU - Grindhammer, G.

AU - Haidt, D.

AU - Hajduk, L.

AU - Haller, J.

AU - Heinemann, B.

AU - Heinzelmann, G.

AU - Henderson, R. C.W.

AU - Henschel, H.

AU - Henshaw, O.

AU - Heremans, R.

AU - Herrera, G.

AU - Herynek, I.

AU - Hildebrandt, M.

AU - Hilgers, M.

AU - Hiller, K. H.

AU - Hladký, J.

AU - Höting, P.

AU - Hoffmann, D.

AU - Horisberger, R.

AU - Hovhannisyan, A.

AU - Ibbotson, M.

AU - Işsever, C.

AU - Jacquet, M.

AU - Jaffre, M.

AU - Janauschek, L.

AU - Janssen, X.

AU - Jemanov, V.

AU - Jönsson, L.

AU - Johnson, C.

AU - Johnson, D. P.

AU - Jones, M. A.S.

AU - Jung, H.

AU - Kant, D.

AU - Kapichine, M.

AU - Karlsson, M.

AU - Karschnick, O.

AU - Katzy, J.

AU - Keil, F.

AU - Keller, N.

AU - Kennedy, J.

AU - Kenyon, I. R.

AU - Kiesling, C.

AU - Kjellberg, P.

AU - Klein, M.

AU - Kleinwort, C.

AU - Kluge, T.

AU - Knies, G.

AU - Koblitz, B.

AU - Kolya, S. D.

AU - Korbel, V.

AU - Kostka, P.

AU - Koutouev, R.

AU - Koutov, A.

AU - Kroseberg, J.

AU - Krüger, K.

AU - Kueckens, J.

AU - Kuhr, T.

AU - Landon, M. P.J.

AU - Lange, W.

AU - Laštovicka, T.

AU - Laycock, P.

AU - Lebedev, A.

AU - Leißner, B.

AU - Lemrani, R.

AU - Lendermann, V.

AU - Levonian, S.

AU - List, B.

AU - Lobodzinska, E.

AU - Lobodzinski, B.

AU - Loktionova, N.

AU - Lubimov, V.

AU - Lüders, S.

AU - Lüke, D.

AU - Lytkin, L.

AU - Maiden, N.

AU - Malinovski, E.

AU - Mangano, S.

AU - Marage, P.

AU - Marks, J.

AU - Marshall, R.

AU - Martyn, H. U.

AU - Martyniak, J.

AU - Maxfield, S. J.

AU - Meer, D.

AU - Mehta, A.

AU - Meier, K.

AU - Meyer, A. B.

AU - Meyer, H.

AU - Meyer, J.

AU - Michine, S.

AU - Mikocki, S.

AU - Milstead, D.

AU - Mohrdieck, S.

AU - Mondragon, M. N.

AU - Moreau, F.

AU - Morozov, A.

AU - Morris, J. V.

AU - Müller, K.

AU - Murín, P.

AU - Nagovizin, V.

AU - Naroska, B.

AU - Naumann, J.

AU - Naumann, T.

AU - Newman, P. R.

AU - Niebergall, F.

AU - Niebuhr, C.

AU - Nowak, G.

AU - Nozicka, M.

AU - Olivier, B.

AU - Olsson, J. E.

AU - Ozerov, D.

AU - Panassik, V.

AU - Pascaud, C.

AU - Patel, G. D.

AU - Peez, M.

AU - Perez, E.

AU - Petrukhin, A.

AU - Phillips, J. P.

AU - Pitzl, D.

AU - Pöschl, R.

AU - Potachnikova, I.

AU - Povh, B.

AU - Rauschenberger, J.

AU - Reimer, P.

AU - Reisert, B.

AU - Risler, C.

AU - Rizvi, E.

AU - Robmann, P.

AU - Roosen, R.

AU - Rostovtsev, A.

AU - Rusakov, S.

AU - Rybicki, K.

AU - Sankey, D. P.C.

AU - Sauvan, E.

AU - Schätzel, S.

AU - Scheins, J.

AU - Schilling, F. P.

AU - Schleper, P.

AU - Schmidt, D.

AU - Schmidt, S.

AU - Schmitt, S.

AU - Schneider, M.

AU - Schoeffel, L.

AU - Schöning, A.

AU - Schörner-Sadenius, T.

AU - Schröder, V.

AU - Schultz-Coulon, H. C.

AU - Schwanenberger, C.

AU - Sedlák, K.

AU - Sefkow, F.

AU - Sheviakov, I.

AU - Shtarkov, L. N.

AU - Sirois, Y.

AU - Sloan, T.

AU - Smirnov, P.

AU - Soloviev, Y.

AU - South, D.

AU - Spaskov, V.

AU - Specka, A.

AU - Spitzer, H.

AU - Stamen, R.

AU - Stella, B.

AU - Stiewe, J.

AU - Strauch, I.

AU - Straumann, U.

AU - Tchetchelnitski, S.

AU - Thompson, G.

AU - Thompson, P. D.

AU - Tomasz, F.

AU - Traynor, D.

AU - Truöl, P.

AU - Tsipolitis, G.

AU - Tsurin, I.

AU - Turnau, J.

AU - Turney, J. E.

AU - Tzamariudaki, E.

AU - Uraev, A.

AU - Urban, M.

AU - Usik, A.

AU - Valkár, S.

AU - Valkárová, A.

AU - Vallée, C.

AU - van Mechelen, P.

AU - Vargas Trevino, A.

AU - Vassiliev, S.

AU - Vazdik, Y.

AU - Veelken, C.

AU - Vest, A.

AU - Vichnevski, A.

AU - Volchinski, V.

AU - Wacker, K.

AU - Wagner, J.

AU - Wallny, R.

AU - Waugh, B.

AU - Weber, G.

AU - Weber, R.

AU - Wegener, D.

AU - Werner, C.

AU - Werner, N.

AU - Wessels, M.

AU - Wessling, B.

AU - Winde, M.

AU - Winter, G. G.

AU - Wissing, C.

AU - Woehrling, E. E.

AU - Wünsch, E.

AU - Wyatt, A. C.

AU - Žácek, J.

AU - Zálešák, J.

AU - Zhang, Z.

AU - Zhokin, A.

AU - Zomer, F.

AU - zur Nedden, M.

PY - 2003/5/29

Y1 - 2003/5/29

N2 - 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.

AB - 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.

U2 - 10.1016/S0370-2693(03)00497-0

DO - 10.1016/S0370-2693(03)00497-0

M3 - Article

AN - SCOPUS:0037612136

SN - 0370-2693

VL - 561

SP - 241

EP - 257

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -

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

Abstract

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