Tagged Questions
1
vote
0answers
59 views
Linear rising potential from a Gribov propagator
It is common wisdom that a gluon propagator (Gribov-)like
$$
G(p^2)=\frac{a+bp^2}{cp^4+dp^2+e}
$$
should give rise to a linear rising potential. So far, I have not seen a proof of this and I would ...
0
votes
0answers
108 views
External ghost in QCD (specifically gluon-gluon scattering)
As a kind of followup question to my question of gauge invariance of gluon-gluon scattering (Gauge invariance of gg->gg scattering amplitude?), where I calculated gg->gg scattering with a unitary ...
1
vote
3answers
83 views
Top quark production questions
I am just looking on the TopQuark production via proton antiproton collision and strong interaction. There seem to be three basic possibilities.
$q + \bar q \rightarrow Gluon \rightarrow t +\bar t ...
3
votes
0answers
134 views
Gauge invariance of gg->gg scattering amplitude?
I'm trying to calculate the spin and color averaged gg->gg cross section, and I am stumbling upon gauge invariance:
Must the amplitude not be invariant under replacements $\epsilon_i \to \epsilon_i + ...
