Multi-leptons with High Transverse Momentum at HERA

Authors

• F. D. Aaron, Horia Hulubei National Institute of Physics and Nuclear Engineering
• H. Abramowicz, Tel Aviv University
• I. Abt, Max Planck Institute for Physics (Werner Heisenberg Institute)
• L. Adamczyk, AGH University of Science and Technology
• M. Adamus, Institute of Nuclear Chemistry and Technology, Warsaw
• M. Aldaya Martin, Deutsches Elektronen-Synchrotron (DESY)
• C. Alexa, Horia Hulubei National Institute of Physics and Nuclear Engineering
• K. Alimujiang, Deutsches Elektronen-Synchrotron (DESY)
• V. Andreev, P.N. Lebedev Physical Institute of the Russian Academy of Sciences
• S. Antonelli, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
• P. Antonioli, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
• A. Antonov, National Research Nuclear University MEPhI
• B. Antunovic, Deutsches Elektronen-Synchrotron (DESY)
• M. Arneodo, Università degli Studi del Piemonte Orientale "Amedeo Avogadro"
• A. Asmone, Università degli Studi Roma Tre
• V. Aushev, Institute of Nuclear Research, National Academy of Sciences in Ukraine
• O. Bachynska, Institute of Nuclear Research, National Academy of Sciences in Ukraine
• S. Backovic, University of Montenegro
• A. Baghdasaryan, Yerevan Physics Institute
• A. Bamberger, Universität Freiburg im Breisgau
• A. N. Barakbaev, Institute of Physics and Technology Kazakhstan
• G. Barbagli, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
• G. Bari, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
• F. Barreiro, Universidad Autónoma de Madrid
• E. Barrelet, Laboratoire de Physique Nucléaire et de Hautes Energies
• W. Bartel, Deutsches Elektronen-Synchrotron (DESY)
• D. Bartsch, Universität Bonn
• M. Basile, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
• K. Begzsuren, Mongolian Academy of Sciences
• O. Behnke, Deutsches Elektronen-Synchrotron (DESY)
• J. Behr, Deutsches Elektronen-Synchrotron (DESY)
• Margarita C. K. Mattingly, Andrews UniversityFollow

Document Type

Article

Publication Date

12-1-2009

Keywords

Lepton-nucleon scattering

Abstract

Events with at least two high transverse momentum leptons (electrons or muons) are studied using the H1 and ZEUS detectors at HERA with an integrated luminosity of 0.94 fb-1. The observed numbers of events are in general agreement with the Standard Model predictions. Seven di- and tri-lepton events are observed in e+p collision data with a scalar sum of the lepton transverse momenta above 100GeV while 1.94 ± 0.17 events are expected. Such events are not observed in e-p collisions for which 1.19 ± 0.12 are predicted. Total visible and differential di-electron and di-muon photoproduction cross sections are extracted in a restricted phase space dominated by photon-photon collisions. © SISSA 2009.

Journal Title

Journal of High Energy Physics

Volume

2009

Issue

10

DOI

https://doi.org/10.1088/1126-6708/2009/10/013

First Department

Physics

Recommended Citation

Aaron, F. D.; Abramowicz, H.; Abt, I.; Adamczyk, L.; Adamus, M.; Aldaya Martin, M.; Alexa, C.; Alimujiang, K.; Andreev, V.; Antonelli, S.; Antonioli, P.; Antonov, A.; Antunovic, B.; Arneodo, M.; Asmone, A.; Aushev, V.; Bachynska, O.; Backovic, S.; Baghdasaryan, A.; Bamberger, A.; Barakbaev, A. N.; Barbagli, G.; Bari, G.; Barreiro, F.; Barrelet, E.; Bartel, W.; Bartsch, D.; Basile, M.; Begzsuren, K.; Behnke, O.; Behr, J.; and Mattingly, Margarita C. K., "Multi-leptons with High Transverse Momentum at HERA" (2009). Faculty Publications. 1856.
https://digitalcommons.andrews.edu/pubs/1856

Acknowledgements

Retrieved February 22, 2021 from https://iopscience.iop.org/article/10.1088/1126-6708/2009/10/013/pdf