Conclude that if m h 2 m b then the Higgs will almost always decay to bb c What

# Conclude that if m h 2 m b then the higgs will almost

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Conclude that if m h > 2 m b then the Higgs will almost always decay to bb ¯ . c) What is the total cross section for e + e - h b ¯ b ? How many Higgses could LEP 1 have produced through this way? d) If s >m h + m Z , the process e + e - Z + h bb ¯ μ + μ - is allowed. How many Hig- gses could LEP 2 have produced this way? (The branching ratio of Z μ + μ - is around 3%. You can assume Z and h are produced on-shell, and Z couples like a photon.) 2. Calculate the 1-loop contribution of the Higgs boson to the electron magnetic moment. You are allowed to make approximations if necessary. 3. Indirect Higgs searches. a) The experimental value and theoretical prediction for g -2 of the electron are listed on the door of Jefferson 463. Use these values to put a lower bound on the Higgs mass. b) The current best experimental value for g -2 of the muon is g μ - 2 2 = 11659208.0 ± 6.3 × 10 - 10 . The current theory prediction (with no Higgs) is g μ - 2 2 = 11659182.0 ± 8.0 × 10 - 10 . Use these values to put a lower bound on the Higgs mass. c) The bound you found is very weak because the Higgs is neutral. Can you think of

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