Physicists think they have detected an asymmetry in the arrangement of galaxies in the universe. If confirmed, the discovery could point to the signature of unknown fundamental laws of physics at work during the Big Bang. The researchers tried to construct tetrahedra among a set of four galaxies, and when they constructed all possible tetrahedra in a catalog of 1 million galaxies, they found that there were more tetrahedra facing one direction than their mirror images. This asymmetry reached a level of statistical certainty (7 sigma). Scientists are cautious about the results, saying mistakes could still happen. The assumed imbalance violates a symmetry known as parity. If it is confirmed, then it must reflect the unknown ingredient of violating the parity in the process of creating the world, and it is to sow the seeds for the development of all the structures of the universe. Parity conservation was once considered to be universal. Chinese physicist Wu Jianxiong revealed the existence of slight chirality in 1957 in nuclear decay experiments. Physicists have since tried to use parity violations to explain the asymmetry of matter and antimatter in the universe. In their latest research, they discovered the chirality of the tetrahedral distribution of galaxies.
This article is transferred from: https://www.solidot.org/story?sid=73577
This site is only for collection, and the copyright belongs to the original author.