Speaker
Description
Correlations play a fundamental role in many branches of physics, from quantum mechanics to particle physics and cosmology. In particular, the astonishing homogeneity of the angular distribution of the Cosmic Microwave Background (CMB) radiation across the sky (measured with high precision by WMAP and Planck missions) requires of an inflationary epoch right after the Big Bang to solve the horizon problem. However, still some anomalies like the lack of positive large-angle correlations show up in the study of the CMB, likely indicating the need of a better understanding of the universe evolution.
Angular correlations in high-energy collisions also could play an important role to uncover a possible non-conventional stage of matter (e.g. from Hidden Valley models) produced on top of the QCD partonic cascade followed by final hadronization. Indeed, new physics beyond the SM could stretch and enhance (pseudo)rapidity and azimuthal 2- and 3-particle correlations in high-energy collisions. We explore a suggestive cosmological analogy together with the physical potential of this technique to detect new physics in hadronic collisions at the LHC, and more cleanly at future e+e- colliders.
Related papers:
https://arxiv.org/pdf/2205.13257.pdf
https://arxiv.org/pdf/2202.10987.pdf
https://arxiv.org/pdf/2110.05900.pdf
https://arxiv.org/pdf/2006.06569.pdf
Abstract
Correlations play a fundamental role in many branches of physics, from quantum mechanics to particle physics and cosmology. In particular, the astonishing homogeneity of the angular distribution of the Cosmic Microwave Background (CMB) radiation across the sky (measured with high precision by WMAP and Planck missions) requires of an inflationary epoch right after the Big Bang to solve the horizon problem. However, still some anomalies like the lack of positive large-angle correlations show up in the study of the CMB, likely indicating the need of a better understanding of the universe evolution.
Angular correlations in high-energy collisions also could play an important role to uncover a possible non-conventional stage of matter (e.g. from Hidden Valley models) produced on top of the QCD partonic cascade followed by final hadronization. Indeed, new physics beyond the SM could stretch and enhance (pseudo)rapidity and azimuthal 2- and 3-particle correlations in high-energy collisions. We explore a suggestive cosmological analogy together with the physical potential of this technique to detect new physics in hadronic collisions at the LHC, and more cleanly at future e+e- colliders.
