Studies on the hadronic structure at high energies

18 May 2021 | 16:00
Virtual/Online

Inclusive as well as exclusive emissions in foward and central directions of rapidity are widely recognized as excellent channels to access the nucleon structure in the high-energy/small-x regime. Here, several phenomenological analyses have been proposed so far, this allowing us to probe kinematic ranges in the intersection corners of different approaches. At large transverse momenta, a high-energy factorization (HEF) formula is established within the Balitsky–Fadin–Kuraev–Lipatov (BKFL) formalism, where the so-called unintegrated gluon distribution (UGD) drives the gluon evolution at small-x. Recent analyses on the diffractive electroproduction of ρ mesons have corroborated the underlying assumption that the small-size dipole scattering mechanism is at work, thus validating the use of the HEF formalism. Nonetheless, a significant sensitivity of polarized cross sections to intermediate values of the meson transverse momenta, where, in the case of inclusive emissions, a description at the hand of the transverse-momentum dependent (TMD) factorization starts to be most appropriate framework, has been observed. Similar studies on emissions of quarkonium states, whose theoretical description at small-x is expected to rely also on quark dipoles of larger size, would certainly help us to shed light on the interplay between HEF and TMD formalisms. In this seminar I propose to address these points, showing how phenomenological analyses doable at new-generation colliding machines, as the EIC, the HL-LHC and NICA-SPD, can accelerate progress in our understanding of the hadronic structure at high energies. Ultimately, they trace the path toward the development of a unified formalism, where both the TMD and the BFKL evolution mechanisms are consistently integrated in the definition of small-x gluon TMD distributions.

People

  • I defended my PhD thesis in June 2017 at the Università della Calabria (Cosenza, Italy), with title “High-energy resummation in semi-hard processes at the LHC”. Then, I got two postdoctoral scholarships from the Italian Foundation “Angelo della Riccia” at the Instituto de Física Teórica UAM/CSIC in Madrid (Spain), where I stayed from June 2017 to September 2018. In autumn of 2018 I started at the Università degli Studi di Pavia (Italy) my second postdoctoral experience, receiving support from the 3DGLUE MIUR FARE grant (No. R16XKPHL3N), spin-off of the 3DSPIN ERC program (No. 647981). Currently, I am a postdoctoral researcher at the ECT*. Research interests: - main: high-energy QCD, hadronic structure, BFKL resummation, TMD factorization; - recent: Higgs sector, vector bosons (Drell-Yan), quarkonia; - regular participation in: Snowmass 2021, EIC User Group.
  • Instructor
    FBK

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