Events with an isolated lepton and missing transverse momentum and measurement of W production at HERA

F. D. Aaron, H. Abramowicz, Iris Abt, L. Adamczyk, M. Adamus, Maria Aldaya Martin, C. Alexa, V. Andreev, S. Antonelli, P. Antonioli

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А. Антонов, B. Antunović, M. Arneodo, V. Aushev, O. Bachynska, S. Backović, A. Baghdasaryan, A. Bamberger, A.N. Barakbaev, G. Barbagli, Giacomo Bari, Fernando Barreiro, E. Barrelet, W. Bartel, D. Bartsch, M. Basile, Khurelbaatar Begzsuren, O. Behnke, J. K. Behr, U. Behrens, L. Bellagamba, A. Belousov, A. Bertolin, S. Bhadra, M. Bindi, J.C. Bizot, C. Blohm, T. Bołd, E. Boos, M. Borodin, K. Borras, D. Boscherini, D. Bot, V. Boudry, S. Boutle, I. Božović-Jelisavc̆ić, J. Braciník, G. Brandt, M. Brinkmann, V. Brisson, Ian C. Brock, E. Brownson, R. Brugnera, N.C. Brümmer, D. Bruncko, A. Bruni, G. Bruni, B. Brzozowska, Armen Bunyatyan, Gerd W. Buschhorn, Peter John Bussey, Jonathan Mark Butterworth, Ben Bylsma, L. Bystritskaya, Allen Christopher Caldwell, A. Campbell, K. B. Cantun Avila, M. Capua, R. Carlin, C. D. Catterall, K. Černý, V. Černý, Sergei V. Chekanov, Vladimir Chekelian, A. Cholewa, J. J. Chwastowski, J. Ciborowski, R. Ciesielski, L. Cifarelli, F. Cindolo, A. Contin, J.G. Contreras, A. M. Cooper-Sarkar, N. Coppola, M. Corradi, F. Corriveau, M. Costa, J. A. Coughlan, G. Cozzika, J. Cvach, G. D’Agostini, John B. Dainton, F. Dal Corso, K. Daum, Michal Deák, J. de Favereau, B. Delcourt, M. Del Degan, J. Del Peso, J. Delvax, S. Dusini, A. M. Fomenko, E. Gallo, L. Görlich, Christoph Grab, T. Greenshaw, Grzegorz Grzelak, GIUSEPPE IACOBUCCI, S. De Pasquale, M. Kaur, Salvatore Fazio, E. ̃Tassi, B. Pawlik, L. Zawiejski, M. Przybycień, Matthew Wing, Aleksander Filip Zarnecki, M. Lisovyi, E. M. Lobodzinska

Journal of High Energy Physics, 2010

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DOI 10.1007/jhep03(2010)035
Data confidence 85 high
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Abstract

A search for events containing an isolated electron or muon and missing transverse momentum produced in e ± p collisions is performed with the H1 and ZEUS detectors at HERA.The data were taken in the period 1994-2007 and correspond to an integrated luminosity of 0.98 fb -1 .The observed event yields are in good overall agreement with the Standard Model prediction, which is dominated by single W production.In the e + p data, at large hadronic transverse momentum P X T > 25 GeV, a total of 23 events are observed compared to a prediction of 14.0 ± 1.9.The total single W boson production cross section is measured as 1.06 ± 0.16 (stat.)± 0.07 (sys.)pb, in agreement with an Standard Model (SM) expectation of 1.26 ± 0.19 pb.