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Dipartimento di Fisica

A QCD story: high-energy resummation in the semi-hard sector
Speaker Speaker: Dr. Francesco Giovanni Celiberto
Affiliato Affiliato: Instituto de Fi'sica Teo'rica, Universidad Auto'noma de Madrid
Data Evento Giovedì 21 Dicembre 2017, alle ore 12.30 - Aula riunioni gruppo di Fisica delle Interazioni Fondamentali, cubo 31 C, Piano V
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The high energies reachable at the LHC and in possible future hadron, lepton
and lepton-hadron colliders offer us a great chance in the search for long-waited
signals of New Physics. They offer, however, also a unique opportunity to test
the Standard Model in unprecedented kinematic ranges. The study of semi-hard
reactions still represent a challenge in the high-energy limit QCD. Here, the fixedorder
perturbative description misses the effect of large energy logarithms, which
compensate the smallness of the QCD coupling constant and must therefore be
resummed to all orders. The Balitsky-Fadin-Kuraev-Lipatov (BFKL) approach
is the most powerful tool to resum to all orders these large logarithms both in
the leading (LLA) and the next-to-leading (NLA) approximation. With the aim
to improve our understanding of QCD dynamics, we propose to study different
processes in the NLA BFKL. First, we continue the analysis of two-body final
state reactions (i) by addressing open formal problems in the forward jet production
(Mueller-Navelet sector) and (ii) by extend the study, recently proposed,
of the inclusive production of two hadrons with high transverse momenta and
well separated in rapidity. Then, we come up with a totally new possibility, i.e.
the analysis of the inclusive production of two heavy quark-antiquark pairs, well
separated in rapidity. Our approach is two-fold: (i) studying the photoproduction
channel (suitable for the physics at the future lepton colliders); (ii) estimating
the hadroproduction effects at the LHC.