Joint INFN-UNIMI-UNIMIB Pheno Seminars
Factorization restoration through Glauber gluons
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Europe/Zurich
Aula Caldirola (Università degli Studi di Milano)
Aula Caldirola
Università degli Studi di Milano
Via Celoria 16, 20133 Milano
Description
We analyze the low-energy dynamics of gap-between-jets cross sections at hadron colliders, for which phase factors in the hard amplitudes spoil collinear cancellations and lead to double logarithmic behavior. Based on a method-of-regions analysis, we identify contributions from perturbative active-active Glauber-gluon exchanges with precisely the right structure to render the cross section consistent with PDF factorization below the gap veto scale. The Glauber contributions we identify are unambiguously defined without any additional regulators beyond dimensional regularization.