Prospects of searching for (un)particles from a Hidden Sector at the LHC

por Miguel Ángel Sanchis Lozano (IFIC Valencia)

viernes 28 nov. 2008 12:00 → 13:00 Europe/Madrid

Sala Seminarios (Dpto. de Física Teórica (UVEG))

Most signatures of new physics have been studied on the transverse plane with respect to the beams direction at the LHC where background is much reduced. In this talk we propose the analysis of inclusive longitudinal (pseudo)rapidity correlations among final-state (charged) particles in order to search for (un)particles belonging to a Hidden Sector beyond the Standard Model, using a selected sample of p-p mimimum bias events (applying appropriate off-line cuts on events based on, e.g., high-multiplicity, event shape variables, high-$p_{\bot}$ leptons and photons, etc) collected at the early running of the LHC. To this aim we examine two-particle inclusive and semi-inclusive correlation functions, factorial moments of the multiplicity distribution and forward-backward correlations, without resorting to any particular model but under very general assumptions. Finally, motivated by some techniques employed in the search for Quark-Gluon-Plasma in heavy-ion collisions, we investigate about the impact of such intermediate (un)particle stuff on the (multi)fractality of parton cascades in p-p collisions, by means of a L\'evy stable law description and a Ginzburg-Landau model. Results from our preliminary study seem encouraging for a future experimental analysis.