Recent content by marlon1

  1. M

    Calculating Z0 Decay Matrix Element: Finding the Error

    I want to calculate the matrix element of Z0 decay into a fermion, antofermion pair given the propagator, vertex element and fermi's golden rule. But somewthing is going wrong. First the propagator has a term 1/Mz^2 so the MatrixElement^2 will go like 1/Mz^4. but the vertex factor has...
  2. M

    Please help; calculation phase space -> how do I use the Delta functions?

    Vergeet niet dat de je p3's en p4's hebt! (p4=(E,p) \delta^{4}(p1+p2-p3-p4) d^{3}p4 =\delta(E1+E2-E3-E4) \delta^{3}(p1+p2-p3-p4)d^{3}p4 = \delta(E1+E2-E3-E4) \delta^{3}(-p3-p4) d^{3} p4 (CM frame: p1=-p2) =\delta(E1+E2-E3-E4) \delta(x) dx (x= -p3-p4 = 0 CM frame) =...
  3. M

    Please help; calculation phase space -> how do I use the Delta functions?

    Can somebody help me out? I'm reading about formulas for cross sections for spin1 particles but I don't understand the delta functions, in calculating the 2particle pahse space psi For example the interaction; A+B -> C+D has the formula; psi= (2pi)^2 delta(Pa+Pb-Pc-Pd) d3Pc d3Pd / 4EcEd...
  4. M

    Calculating Partial Transition Rates W from Branching Ratios

    How do I calculate partial transition rates W if I know the Branching Ratios of the different modes? :confused:
Back
Top