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http://physicsweb.org/article/news/7/11/3/
It's interesting to say the least, though of course it's not yet been reproduced. opinions? wild speculation?
Mesons violate Bell’s inequality
6 November 2003
The famous Bell's inequality of quantum mechanics has been tested in a high-energy particle physics experiment for the first time. The inequality was violated by three standard deviations in experiments with B mesons at the KEK laboratory in Japan - yet again confirming the predictions of quantum theory (arxiv.org/abs/quant-ph/0310192; J. Mod. Optics to be published). Previously most Bell's inequality experiments have been performed with photons or ions.
Mesons are subatomic particles that are composed of a quark and an antiquark. They are important in the context of Bell's Inequality because they are often used in experiments to test the validity of quantum mechanics and its predictions.
Mesons violate Bell's Inequality by exhibiting behavior that cannot be explained by classical physics. This behavior, known as quantum entanglement, occurs when two particles become linked and share a connection regardless of the distance between them. This violates the principle of locality, which states that objects can only influence each other if they are in each other's proximity.
The violation of Bell's Inequality is significant because it provides evidence for the validity of quantum mechanics. It shows that the behavior of particles at the subatomic level cannot be explained by classical physics and highlights the strange and counterintuitive nature of the quantum world.
Scientists test for the violation of Bell's Inequality with mesons by using a method called Bell's test. This involves entangling two mesons and then measuring their properties, such as spin. The results of these measurements are then compared to the predictions of classical physics to determine if Bell's Inequality has been violated.
The implications of mesons violating Bell's Inequality are far-reaching and have implications for our understanding of the fundamental laws of physics. It suggests that the world operates according to the rules of quantum mechanics, which is crucial in fields such as quantum computing and communications. It also challenges our perceptions of reality and the concept of causality, as it shows that particles can be connected in ways that are not bound by time or space.