Semileptonic decays of top quarks |
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| Affiliation: | 1. III. Physikalisches Institut A, RWTH Aachen, Physikzentrum, 52056 Aachen, Germany;2. Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany;3. H. H. Wills Physics Laboratory, University of Bristol, Bristol, BS8 1TL, UK;4. High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ, UK;5. Institute of Particle Physics Phenomenology, Durham University, UK;6. Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland;7. Experimental Physics Department, CERN, CH 1211 Geneva 23, Switzerland;8. Antwerp University, B2610 Wilrijk, Belgium;9. SISSA and INFN Sezione di Trieste, via Bonomea 265, I-34136 Trieste, Italy;10. Theoretical Particle Physics and Cosmology Group, Department of Physics, King’s College London, London WC2R 2LS, UK;11. Theoretical Physics Department, CERN, CH-1211 Geneva 23, Switzerland;12. Deutsches Elektronen-Synchrotron, Notkestr. 85, 22607 Hamburg, Germany;13. Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA;14. Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford, OX1 3PN, UK;15. Physics Department, Brown University, Providence, RI 02912, USA;p. GRAPPA Centre of Excellence, University of Amsterdam, Amsterdam, The Netherlands;q. Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, UK;r. Astrophysics Group, Imperial College, Blackett Laboratory, Prince Consort Road, London, SW7 2AZ, UK;1. Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA;2. School of Physics and Astronomy, Monash University, Victoria 3800, Australia;3. ARC Centre of Excellence for Particle Physics at the Tera-scale, Monash University, Victoria 3800, Australia;1. Physics Department, Tsinghua University, Collaborative Innovation Center of Quantum Matter, Beijing 100084, China;2. Institute for Theoretical Physics, Johann Wolfgang Goethe-University Frankfurt, Max-von-Laue-Strasse 1, 60438 Frankfurt am Main, Germany;3. Frankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, 60438 Frankfurt am Main, Germany;1. Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany;2. ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany;3. Institute of Science and Technology Austria, Am Campus 1, 3400 Klosterneuburg, Austria |
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| Abstract: | The lepton spectrum from the semileptonic decay of a heavy top quark is calculated, including the effect of the W propagator and QCD corrections. Lepton spectra from the decay of top quarks in toponium are affected by bound state effects, in particular by Fermi motion. Semileptonic decays may therefore probe the toponium wave function at very small distances. |
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