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Homework Help: Branching ratio question

  1. Dec 6, 2009 #1
    1. The problem statement, all variables and given/known data
    Work out the branching ratio of (W --> e-Ve)
    The book uses fermi's golden rule to do it, but im wondering if my different solution is also valid?

    2. Relevant equations

    Γ = 1/τ and ΔEΔT = hbar

    3. The attempt at a solution

    If ΔEΔT = hbar, then i can write ΔT = hbar/ΔE

    Therefore Γ = 1/ΔT = ΔE/hbar should give me an approximate value of the branching ratio....

    Can anyone tell me if this is a valid approach to find the branching ratio for a particle decay? If not please let me know of any easy way to do it, im sure there is one i just cant find it!!
  2. jcsd
  3. Dec 6, 2009 #2
    is there any reason why this might not have been answered? Phrasing\clarity? content?
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