Assume that the number of neutrinos with mass < < M Z is 3, 4, or 5
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Assume that the number of neutrinos with mass << MZ is 3, 4, or 5 in turn, without changing anything else. Evaluate for each case the Z branching ratio into μ+μ- and the ratio Γμμ/ΓZ. Evaluate the ratio of the cross-sections at the peak for e+e- into hadrons for N = 3, 4 and 5.
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Related Book For
Introduction to Elementary Particle Physics
ISBN: 978-1107050402
2nd edition
Authors: Alessandro Bettini
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