Speaker
Federico Ripani
(Università di Roma “La Sapienza” and INFN Sezione di Roma)
Description
I will present the Next-to-next-to-leading order QCD massive corrections,
induced by a loop of top quarks, to di-photon production in proton-proton
collisions. This process is very important as a test of perturbative QCD
and as a background process for the decay of a Higgs into two photons.
All the involved partonic subprocesses are taken into account; in
particular the quark-antiquark annihilation channel, which has required
the computation of new two-loop Master Integrals. These have been evaluated using the
differential equations method, in the semi-analitically approach with
generalised power series expansions.
I will then present a phenomenological study of the impact of our
corrections for different observables.
Primary authors
Roberto Bonciani
(Università di Roma "La Sapienza" and INFN sezione di Roma)
Matteo Becchetti
(Università di Torino and INFN sezione di Torino)
Leandro Cieri
(Instituto de Fisica Corpuscular, Universitat de Valencia – Consejo Superior de Investigaciones Cientificas)
Federico Coro
(Instituto de Fisica Corpuscular, Universitat de Valencia – Consejo Superior de Investigaciones Cientificas)
Federico Ripani
(Università di Roma “La Sapienza” and INFN Sezione di Roma)
