Abstract
In this paper, analogies between multiparticle production in high-energy collisions and the time evolution of the early universe are discussed. A common explanation is put forward under the assumption of an unconventional early state: a rapidly expanding universe before recombination (last scattering surface), followed by the CMB, later evolving up to present days, versus the formation of hidden/dark states in hadronic collisions followed by a conventional QCD parton shower yielding final-state particles. In particular, long-range angular correlations are considered pointing out deep connections between the two physical cases potentially useful for the discovery of new physics.
Highlights
The study of correlations has decisively contributed to the advancement of scientific knowledge in all branches of physics, from condensed matter and quantum information to particle physics and cosmology
A common explanation is put forward under the assumption of an unconventional early state: a rapidly expanding universe before recombination, followed by the cosmic microwave background, later evolving up to present days, versus the formation of hidden/dark states in hadronic collisions followed by a conventional QCD parton shower yielding final-state particles
We discuss an intriguing similarity between long-range angular correlations observed in the cosmic microwave background (CMB) and those obtained from multiparticle production in highenergy collisions
Summary
The study of correlations has decisively contributed to the advancement of scientific knowledge in all branches of physics, from condensed matter and quantum information to particle physics and cosmology In the latter case, the systematic study of correlations was considered in the context of the large structure of the Universe [1]. We show that one consequence of the production of a new still unknown stage of matter in high-energy hadronic collisions is to enhance long-range angular correlations among finalstate particles [6,7,8] This conclusion bears a certain resemblance with the observed small temperature fluctuations of the CMB requiring an inflationary period right after the big bang. This difference should not alter the main consequences of our analogy
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