Speaker
Description
In this talk we present the consequences of considering correlated constituents inside the proton on the initial state properties of p+p interactions at LHC energies [1,2]. The proton is modeled as a system of gluonic hot spots whose transverse positions are subjected to short-range repulsive correlations. We rely on a Monte Carlo Glauber approach with event-by-event fluctuations in the transverse positions of the hot spots and their entropy deposition. In fact the inclusion of non-trivial spatial correlations leads to substantial differences in the results for initial state properties, the spatial eccentricities. Further we show the centrality dependence of the (anti)-correlation of $\varepsilon_2$ and $\varepsilon_3$ in terms of symmetric cumulants. This study is particularly relevant and timely as the recent measurement of the symmetric cumulants by the CMS Collaboration has shown, once again, a similar pattern across different interaction systems from high-multiplicity p+p to p+Pb and Pb+Pb adding evidence on the possibility of having collective effects in small systems.
[1] Physics Letters B 770, 149 (2017)
[2] arXiv: 1612.06274 [hep-ph] (to appear in PRC).
