Speaker
Summary
Double parton distribution functions (dPDF), accessible in high
energy proton-proton and proton nucleus collisions, encode informa-
tion on how partons inside a proton are correlated among each other
and could represent a novle tool to explore the 3D proton structure. In
order to evaluate the role of double correlations between two partons
in a proton, dPDFs have been calculated by means of quark models
[1, 2]. In a recent paper of ours, we have presented a dynamical cal-
culation of the so called “effective cross section”, \sigma_eff , fundamental
ingredient for the comprehension of the role of double parton scat-
tering in proton-proton collisions. We have found an expression for
\sigma_eff , suitable for this kind of analyses, in terms of standard PDFs
and dPDFs. All these quantities have been previously calculated in
a Light-Front, fully Poincar´e covariant approach, following Ref. [2].
In this talk, the results of the calculation of dPDFs and \sigma_eff will be
discussed at the scale of the model and at higher energy scales, evalu-
ating properly the pQCD evolution of the calculated dPDFs, both in
the non-singlet and singlet sectors [3]. This procedure is fundamental
to compare our results with the available experimental data for \sigma_eff .
For the latter quantity, results show a strong x dependence in the va-
lence region, a feature which could allow to obtain novel information
on the three dimensional nucleon structure. The possibility to mea-
sure two-parton correlations in proton-proton scattering at the LHC,
studying specific final states, will be addressed.
References
[1] M. Rinaldi, S. Scopetta and V. Vento, Phys. Rev. D 87, 114021 (2013)
[2] M. Rinaldi, S. Scopetta, M. Traini and V. Vento, JHEP 1412, 028 (2014)
[arXiv:1409.1500 [hep-ph]].
[3] M. Rinaldi, S. Scopetta, M. Traini and V. Vento, Phys. Lett. B 752, 40 (2016)
