Orateur
Description
In the Color Glass Condensate framework, the colliding projectiles are
described as classical color currents. Gluon production at leading
order in the coupling is obtained from the retarded solution of the
classical Yang-Mills equations, with these currents acting as sources.
However, while the final gluon spectrum is gauge invariant, the
classical color field from which it is obtained is gauge dependent.
This makes the intermediate steps of this approach unnecessarily
complicated, as some effort is spent to also determine the gauge
dependent part of the field, which is then discarded when one
calculates a gauge invariant observable.
In this work, we use a generalization of BCFW recursion applicable to
off-shell gluons in order to calculate directly the gauge independent
gluon production amplitude. This approach allows all manipulations to
be performed in terms of gauge invariant amplitudes instead of gauge
dependent Feynman diagrams, and therefore provides a gauge agnostic
way to obtain the result.
| Working Group | WG2. Hadronic collisions |
|---|---|
| Type of oral contribution | Theory |