Huge progress made in attempt to upgrade standard model of particles

Physicists have made significant progress in their efforts to upgrade the standard model of particles, which currently serves as our best explanation for the behavior of all known particles and forces. This upgrade could potentially lead to new experiments at the forefront of known physics.

The standard model extension (SME) provides a framework for exploring novel quantum fields that could violate Lorentz symmetry, an idea initially proposed by Hendrik Lorentz in the 1900s and later incorporated into Albert Einstein's theory of special relativity. Lorentz symmetry is a fundamental principle that states experiments should yield the same results regardless of whether they occur in a stationary room, a room moving at constant speed, or a room that has been rotated.

Researchers have identified 132 possible ways to update the standard model, and a team led by Jay Tasson from Carleton College in Minnesota has calculated just how precisely researchers should search for each of these 132 candidates. This search is akin to identifying a special direction in the universe where experiments would yield different outcomes due to the influence of a new force.

If a direction is discovered, it would indicate that subatomic particles are interacting with a previously unknown quantum field that extends throughout space. Mathematically, the search for Lorentz-violating effects resembles solving a complex jigsaw puzzle, where researchers must fit hypothetical fields into the existing standard model without disrupting the well-established parts.

Focusing on protons, neutrons, and electrons, Tasson and his colleagues analyzed experiments involving rotating helium and potassium atoms, as well as electrons within a pendulum. They also accounted for Earth's rotation, which introduces different velocities at various times of day and latitudes. This analysis, spanning seven years, has effectively filled gaps in the reference table of Lorentz violations, which had remained largely unexplored for the past 30 years.

The implications of this work are profound, potentially motivating new experiments with more sensitive instruments. If researchers detect a Lorentz violation, it could provide crucial insights into the development of a new theory of everything, such as iterations of string theory.