Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-09-08
JHEP0601:007,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
29 pages, pictures generated with feynmf graphic package
Scientific paper
10.1088/1126-6708/2006/01/007
A general discussion is presented of the single logarithmic soft factor that appears in two scale QCD observables in processes involving four partons. We treat it as the ``fifth form factor'', accompanying the four collinear singular Sudakov form factors attached to colliding and outgoing hard partons. The fifth form factor is expressed in terms of the Casimir operators (squared colour charges) of irreducible representations in the crossing $t$- and $u$-channels. As an application we revisit the problem of large angle radiation in $gg\to gg$ and give a relatively simple solution and interpretation of the results. We found an unexpected symmetry of the soft anomalous dimension under exchange of internal and external variables of the problem whose existence calls for explanation.
Dokshitzer Yu. L.
Marchesini Giuseppe
No associations
LandOfFree
Soft gluons at large angles in hadron collisions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Soft gluons at large angles in hadron collisions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Soft gluons at large angles in hadron collisions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1736