Seminar with prof. Prof. Emerson Gustavo de Souza Luna – 28/November/2014 – 10h15min
THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:
Nonperturbative QCD effects in forward scattering at LHC
Prof. Emerson Gustavo de Souza Luna – IF/UFRGS
Abstract:
We study infrared contributions to semihard parton-parton interactions by considering an effective charge whose finite infrared behavior is constrained by a dynamical mass scale. Using an eikonal QCD-based model in order to connect this semihard parton-level dynamics to the hadron-hadron scattering, we obtain predictions for the proton-proton ($pp$) and antiproton-proton ($\bar{p}p$) total cross sections, $\sigma_{tot}^{pp,\bar{p}p}$, as well as for the ratios of the real to imaginary part of the forward scattering amplitude, $\rho^{pp,\bar{p}p}$. We discuss the theoretical aspects of this formalism and consider the phenomenological implications of a class of energy-dependent form factors in the high-energy behavior of the forward amplitude. Our results, obtained using a group of updated sets of parton distributions, are consistent with the recent data from the TOTEM experiment.
Date: 28/November/2014 – (Friday) – Place: Sala 212 – Auditório do Departamento de Física- Time: 10h15min
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