LanHEP: A Package for the automatic generation of Feynman rules in field theory - Semenov - 2009 () Citation Context ...n. 4 Dijets Production at the Tevatron In order to evaluate the effects, on the technirho phenomenology, of such a modification of the technirho-quark interaction, we ...
interactions. The external lines in a graph symbolize the initial and final state particles, while the internal lines are associated with virtual particles (see Fig.1). Thanks to the associated Feynman rules, mathematical terms are then assigned to each element of these diagrams.Footnote1This allow...
(19) k Once a scheme is fixed, the integral (16) can be evaluated from a set of process-independent Feynman rules which can be computed once and for all in a given model. The R2 terms can typically not be captured by a direct four-dimensional implementation of the numerator of all ...
In the special case where H^ is the Born–Oppenheimer molecular electronic hamiltonian and λ is a nuclear displacement RIα, the derivative − ∂E/∂λ is the force on the nucleus I and is equal to the product of the nuclear charge and the field at that nucleus due to all other ...
2 dx J (x)4 dy J (y)4 : : : (9.7) Note the change from ordinary to functional derivative operators. Note also that for increasing orders of , each integral operator gets a di¤erent dummy integration variable. But that's just the beginning. To see the e¤ect of the interaction ...
The cornerstone of the UFO format consists of the way in which interactions are implemented, following their decomposition in a colour\(\otimes \)spin space. Any generic vertex\({{\mathcal {V}}}\)involving the interaction ofnexternal particles\(\varphi _i^{\ell _i a_i}(p_i)\)(\(i...