Scientists Made Something Out of Nothing. Literally.

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When you read this story you will learn:

• Seemingly empty spaces are actually filled with perturbations known as virtual particles that are nearly impossible to detect.

• Virtual particles vanish quickly, but by splitting protons at ridiculously high speeds, researchers have managed to give them a longer-lasting energy boost.

• After coalescing into larger particles, the spin of the virtual particles enabled the researchers to follow them into space.

If there were no planets, stars, comets, asteroidsor if there were other cosmic debris floating around, there would only be space, an endless expanse of nothingness. Or at least, it might seem reasonable to think that space is completely empty in the absence of matter; But what if even space isn’t as empty as it seems?

Welcome to the quantum void. What seems like complete emptiness is actually full of oddities subatomic particles this escapes observation. These virtual particlesThey are not actual particles of matter, but disturbances in space caused by the presence of other particles. They appear suddenly and are so temporary that they disappear in a fraction of a second. Since virtual particles cannot be observed directly, the only way to detect them is through their interactions with other particles; this affects measurable properties such as particle mass and the forces exchanged between two particles. Virtual particles are important to scientists because they provide a window into the fundamental forces of the universe: strong And weak nuclear forces and electromagnetism.

These strange particles are not particles at all and cannot be observed directly; this paradox, quantum mechanics. The energy-time uncertainty relationship, a consequence of Werner Heisenberg’s famous theory Uncertainty PrincipleIt allows short-term fluctuations in energy, meaning that particle-antiparticle pairs can briefly emerge from the void before disappearing again. Using the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory on Long Island, a research team led by physicist Zhoudunming Tu found evidence of such virtual quarks and antiquarks (the building blocks of protons and neutrons) by analyzing the spin orientations of the particles; This revealed signatures consistent with their origin in vacuum fluctuations.

“It is now understood that the void has a rich and complex structure, characterized by fluctuating energy fields and condensations of virtual quark-antiquark pairs,” Tu said. in question In a study recently published in Nature. “High-energy proton-proton collisions can free virtual quark-antiquark pairs from space, and these pairs can subsequently form hadrons.”

Using RHIC, Tu’s team split protons in close proximity to each other. speed of lightAn enormous amount of energy is released in this process. This energy was absorbed by virtual quark-antiquark pairs, which are transient fluctuations that normally appear and disappear unnoticed in space, turning them into real, detectable particles. Collisions in particular produced so-called doubles. strange quarks and strange antiquarks, which share the same mass but carry opposite charges. Quark and antiquark appeared to be quantum entangled because each pair resulted from a single vacuum fluctuation; This means that their properties remain related to each other no matter how far they travel from each other. The team confirmed this entanglement using RHIC’s Solenoidal Tracker (STAR) detector; this detector showed that the quarks and antiquarks in each pair were constantly spinning in the same direction; This was a clear sign that their common origin in the void connected them at the quantum level.

Quarks are known to be unstable. They cannot survive for long on their own, so they stay with others. particles create lambda hyperonsElectrically neutral subatomic particles consisting of three quarks, one of which must be a strange quark. The spin of these hyperons is determined by the spin of the strange quark. Lambda hyperons are also unstable and begin to deteriorate after a while. ten billionth It happens in as little as a second, but the upside is that they turn into particles that can be seen by the STAR. How these particles spin is a direct reflection of the lambda hyperon they come from (and therefore the spin of the hyperon’s strange quark). In Tu’s experiment, the quarks and their corresponding antiquarks in the void continued to spin parallel to each other as before forming the hyperon.

By tracing pairs of quarks and antiquarks from their beginnings as virtual particles to their transition into real particles, it may eventually be possible to figure out where protons get most of their energy. stackBecause quarks are so light that they only make up a small percentage. It is thought that most of proton mass It is created by processes occurring inside the proton. Future research involving virtual particles may finally lift the curtain on this mysterious mass generation.

“[We found a link between] pairs of virtual spin-connected quarks [vacuum] final state relative to hadron counterparts,” in question Tuesday. “Our findings provide a new experimental model to explore the dynamics and interaction of quark confinement and entanglement.”

The findings are the most basic building blocks They may owe their weight not to the particles themselves but to the seething void from which they emerge. It turns out that “nothing” may be the most important thing there is.

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