Transverse momentum resummation and diphoton production at LHC
por
Dr.Francesco Coradeschi
(Università degli Studi di Firenze - INFN Sezione di Firenze)
→
Europe/Brussels
Seminario IFIC (Parc Cientific)
Seminario IFIC
Parc Cientific
Descripción
After briefly introducing the b-space transverse momentum (qT) resummation formalism, I will show the latest results for the production of diphoton pairs at the LHC at NNLO. Besides restoring the predictivity of the perturbative QCD prediction at low qT, the resummation improves the agreement of the theoretical prediction with the experimental data. It is worth noting that the resummation formalsim, which is by now very well-established at least in the case of the production of colorless final states, has several powerful features, in particular its universality (most of the coefficient needed to implement the calculation are process-independent) and flexibility, allowing for the prediction of more general distributions than just the qT spectrum: the individual photon momenta and Delta Phi distributions are presented as examples.