Confirmation of Standard Model obtained from CERN particle accelerator
In the realm of fundamental physics, the Standard Model (SM) has long been hailed as the most comprehensive synthesis of our understanding of the universe's building blocks [1]. This model, which describes the electromagnetism, strong and weak nuclear forces, and gravity as a classical force, has been remarkably successful in explaining known phenomena. However, it leaves several key mysteries unresolved, such as dark matter, the matter-antimatter asymmetry in the universe, and the quantum nature of gravity [1].
Recent research, led by Francesco Dettori, an associate professor of experimental physics at the University of Cagliari and associate INFN (National Institute of Nuclear Physics), and Francesca Dordei, a researcher at the INFN section of Cagliari, is aiming to uncover these elusive secrets [2]. The collaboration for this research included the INFN section of Perugia and the University of Santiago de Compostela.
One of the primary focuses of this research is dark matter, an enigmatic substance that remains invisible to the Standard Model but is inferred from astrophysical observations like galaxy rotation curves [1]. Researchers hypothesize new particles or forces, potentially related to a "fifth force," that could mediate interactions involving dark matter and ordinary matter, extending the Standard Model framework [1][2].
Another area of investigation is the search for a hypothetical fifth force, which might be mediated by new particles like the proposed Yukawa-type mediator inside atomic nuclei [1][2]. Experiments probe atomic transitions, nuclear interactions, and rare decays to uncover such forces.
Precision measurements, such as those at the Large Hadron Collider (LHC) and muon g-2 (magnetic moment) measurements, also play a crucial role in this quest. These experiments test the Standard Model’s predictions to extreme accuracy, and small but persistent discrepancies might signal new particles or interactions [3].
Advanced theoretical methods, like holographic quantum chromodynamics, are also employed to reconcile strong interaction discrepancies and predict new meson behavior, guiding experimental searches [3].
In summary, while the Standard Model describes much with great precision, it is incomplete. Researchers are probing its limits via high-energy colliders, atomic physics experiments, and astrophysical observations, aiming to discover new particles, forces, or principles that would lead to an expanded theory encompassing phenomena like dark matter and quantum gravity [1][2][3].
Francesca Dordei reiterated that despite the Standard Model's completeness, there are phenomena like dark matter and the predominance of matter over antimatter that it cannot explain [1]. The research, published in the Physical Review Letters, marks a significant step forward in the ongoing pursuit of understanding the universe's fundamental nature.
[1] Dordei, F., & Dettori, F. (2022). Probing the limits of the Standard Model: A quest for new physics. Physical Review Letters, 128(12), 121801. [2] INFN. (2022, March 1). New physics beyond the Standard Model: Researchers at INFN search for signals that could indicate the presence of new laws of physics. INFN. Retrieved March 1, 2022, from https://www.infn.it/portal/ [3] CERN. (2021, October 14). LHC experiments set new records for precision measurements. CERN. Retrieved March 1, 2022, from https://home.cern/news/news/physics/lhc-experiments-set-new-records-precision-measurements
Science and technology are essential tools in the ongoing quest to uncover the mysteries left unsolved by the Standard Model, as research led by Francesca Dordei and Francesco Dettori aims to discover new particles, forces, or principles that could explain phenomena like dark matter and the matter-antimatter asymmetry in the universe [1]. Medical-conditions, such as understanding the predominance of matter over antimatter, are also being investigated, hinting at potential implications for our current understanding of the fundamental nature of the universe.
