Evidence For T Bar T Gamma Production And Measurement Of Sigma T Bar T Gamma
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Evidence For T Bar T Gamma Production And Measurement Of Sigma T Bar T Gamma
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Author :
language : en
Publisher:
Release Date : 2011
Evidence For T Bar T Gamma Production And Measurement Of Sigma T Bar T Gamma written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Using data corresponding to 6.0 fb−1 of p{bar p} collisions at √s = 1.96 TeV collected by the CDF II detector, we present a cross section measurement of top-quark pair production with an additional radiated photon, t{bar t}[gamma]. The events are selected by looking for a lepton (l), a photon ([gamma]), significant transverse momentum imbalance (E{sub T}), large total transverse energy, and three or more jets, with at least one identified as containing a b quark (b). The t{bar t}[gamma] sample requires the photon to have 10 GeV or more of transverse energy, and to be in the central region. Using an event selection optimized for the t{bar t}[gamma] candidate sample we measure the production cross section of t{bar t} ([sigma]{sub t{bar t}}), and the ratio of cross sections of the two samples. Control samples in the dilepton+photon and lepton+photon+E{sub T}, channels are constructed to aid in decay product identification and background measurements. We observe 30 t{bar t}[gamma] candidate events compared to the standard model expectation of 26.9 ± 3.4 events. We measure the t{bar t}[gamma] cross section ([sigma]{sub t{bar t}}) to be 0.18 ± 0.08 pb, and the ratio of [sigma]{sub t{bar t}[gamma]} to [sigma]{sub t{bar t}} to be 0.024 ± 0.009. Assuming no t{bar t}[gamma] production, we observe a probability of 0.0015 of the background events alone producing 30 events or more, corresponding to 3.0 standard deviations.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
Nuclear Science Abstracts
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Author :
language : en
Publisher:
Release Date : 1976
Nuclear Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Nuclear energy categories.
Particle Physics
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Author : Robert Purdy
language : en
Publisher: Mercury Learning and Information
Release Date : 2017-12-21
Particle Physics written by Robert Purdy and has been published by Mercury Learning and Information this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-21 with Science categories.
This book is designed as a brief introduction to the fundamental particles that make up the matter in our universe. Numerous examples, figures, and simple explanations enable general readers and physics students to understand complex concepts related to the universe. Selected topics include atoms, quarks, accelerators, detectors, colliders, string theory, and more.
High Energy Physics Index
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Author :
language : en
Publisher:
Release Date : 1990
High Energy Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Nuclear physics categories.
Erda Energy Research Abstracts
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Author : United States. Energy Research and Development Administration
language : en
Publisher:
Release Date : 1977
Erda Energy Research Abstracts written by United States. Energy Research and Development Administration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Medicine categories.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1985
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Power resources categories.
Erda Energy Research Abstracts
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Author : United States. Energy Research and Development Administration. Technical Information Center
language : en
Publisher:
Release Date : 1977
Erda Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Force and energy categories.
Erda Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1977
Erda Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with categories.
Inis Atomindex
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Author :
language : en
Publisher:
Release Date : 1986
Inis Atomindex written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Nuclear energy categories.