The naturalness of a theory means it does not contain numbers without units (also known as dimensionless parameters) that are either much larger or much smaller than 1. For example “mirroring” of an image, changes the orientation but preserves the original image. A symmetry is a transfomation operation on a system which is invariant to the systems state or objects. In physics such simplicity is mostly achieved by finding symmetries. $beauty = simplicity + naturalness + elegance$Ī thing is simple if it can be derived from few assumptions. ).īeauty in physical theories according to the book is defined as: She investigates a phenomenon among physicists being lead by beauty and highlights the paradoxy of this approach, how widespread this way of thinking is and where it possibly leads to (Spoiler: Theory predicts particles => Build collider => No particles detected => build bigger collider => No particles detected => build event bigger collider => (. Recently finished the book “Lost in Math” by Sabine Hossenfelder.
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