Is LanHEP the Answer for Generating Feynman Rules from Lagrangians?

  • Thread starter Thread starter Neitrino
  • Start date Start date
  • Tags Tags
    Rules Software
Neitrino
Messages
133
Reaction score
0
Gents,

Is there such software package or something like that... when you input the lagrangian it gives you the vertecies (Feynman rules)...

Thanks
 
Physics news on Phys.org
Last edited by a moderator:
If you don't have a copy of Mathematica handy, there's also LanHEP.
 
Toponium is a hadron which is the bound state of a valance top quark and a valance antitop quark. Oversimplified presentations often state that top quarks don't form hadrons, because they decay to bottom quarks extremely rapidly after they are created, leaving no time to form a hadron. And, the vast majority of the time, this is true. But, the lifetime of a top quark is only an average lifetime. Sometimes it decays faster and sometimes it decays slower. In the highly improbable case that...
I'm following this paper by Kitaev on SL(2,R) representations and I'm having a problem in the normalization of the continuous eigenfunctions (eqs. (67)-(70)), which satisfy \langle f_s | f_{s'} \rangle = \int_{0}^{1} \frac{2}{(1-u)^2} f_s(u)^* f_{s'}(u) \, du. \tag{67} The singular contribution of the integral arises at the endpoint u=1 of the integral, and in the limit u \to 1, the function f_s(u) takes on the form f_s(u) \approx a_s (1-u)^{1/2 + i s} + a_s^* (1-u)^{1/2 - i s}. \tag{70}...
Back
Top