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Inside a burst of debris from smashed protons, linked lambda particles appeared with a shared spin pattern that matches quark pairs expected to form in the vacuum.<\/p>\n
By tracing that pattern through the collision aftermath, Zhoudunming Tu at Brookhaven National Laboratory<\/a> showed that the original alignment persisted into the detected particles.<\/p>\n That alignment did not fade immediately, but carried through into short-lived hyperons before those particles decayed and revealed their internal structure.<\/p>\n Such persistence sets a clear boundary for how long vacuum-born order can survive, and it points toward deeper questions about how that order becomes measurable mass.<\/p>\n Spins that survived<\/p>\n Near each other in angle, the lambda and anti-lambda pairs showed an 18 percent relative polarization, with a 4.4 standard-deviation significance.<\/p>\n Such alignment is the signature the team expected if strange quarks and antiquarks emerged from the vacuum already pointing the same way.<\/p>\n Other pairings did not show the same pattern, which made the main signal stand out instead of blending into ordinary collision noise.<\/p>\n That contrast strengthened the case that the linked quark pairs were not random leftovers from the smashup.<\/p>\n Why lambdas mattered<\/p>\n Lambda particles gave the team a useful advantage because their decays preserve clues about the spin carried by the strange quark inside.<\/p>\n When each lambda broke apart in less than a ten-billionth of a second, its daughter particles revealed the parent\u2019s spin direction.<\/p>\n That let the researchers reconstruct whether the two original particles were aligned, even though the quarks themselves never appeared alone.<\/p>\n The method turned a brief decay chain into a readable record of where the particles likely came from.<\/p>\n A vacuum with structure<\/p>\n Modern physics no longer treats a vacuum as blank emptiness, because energy fields inside it constantly flicker and briefly create particle pairs.<\/p>\n In quantum chromodynamics (QCD<\/a>), the theory of the strong force, quarks are bound so tightly that free ones never last on their own.<\/p>\n Under enough stress, however, those fleeting pairs can be promoted into real ingredients of larger particles after a high-energy collision.<\/p>\n That is why this result matters beyond one detector, because it treats the vacuum as an active source of matter.<\/p>\n Where the visible mass comes from<\/p>\n The Higgs field remains essential because it gives elementary particles their baseline masses, a picture confirmed by CERN in 2012 through the Higgs boson<\/a>.<\/p>\n Protons and neutrons, though, weigh far more than the small masses of their individual quarks would suggest.<\/p>\n Most visible mass therefore seems to come from the energy of the strong interaction and the vacuum conditions surrounding confined quarks.<\/p>\n This new signal does not solve that problem outright, but it gives physicists a fresh experimental handle on it.<\/p>\n When order breaks down<\/p>\n Distance weakened the effect, because widely separated particle pairs lost the shared alignment seen in close pairs.<\/p>\n Researchers describe that loss as decoherence<\/a>, a fading of quantum order as interactions scramble an initially linked system.<\/p>\n Instead of staying tightly coordinated, the spins looked ordinary once the pair separation grew large enough in the detector.<\/p>\n That drop matters because it suggests the signal was real at birth rather than created later by the measurement.<\/p>\n What the signal ruled out<\/p>\n Competing explanations had to be checked, since particle collisions can mimic meaningful patterns when many processes pile together.<\/p>\n The team compared its data with baseline cases and found no matching spin correlation in kaon pairs or in standard event simulations.<\/p>\n It also examined other possible sources, including gluon splitting and later interactions among produced particles, and reported them as negligible.<\/p>\n Those checks do not end the debate, but they narrow the room for simpler explanations.<\/p>\n A new experimental handle<\/p>\n STAR was built to track huge showers of debris from energetic collisions, and the detector itself is house-sized and weighs about 1,200 tons on the Brookhaven site in New York STAR<\/a>.<\/p>\n RHIC also occupies a special place in physics because it has been the world\u2019s only collider able to smash polarized proton beams together for spin studies at high energy RHIC<\/a>.<\/p>\n That combination let the collaboration study not just what particles were made, but how their internal spin information traveled through confinement.<\/p>\n The result opens a route toward testing how vacuum structure, spin, and mass emergence fit into the same story.<\/p>\n Limitations and future research <\/p>\n Not everyone sees the case as closed, because reconstructing complicated collisions still leaves room for hidden backgrounds and missed effects.<\/p>\n Tu framed the promise plainly when he said the measurement opens a new way to examine the vacuum directly.<\/p>\n Future runs could test higher momenta, different collision settings, and hotter environments where the vacuum itself may behave differently.<\/p>\n Those follow-up studies could show whether this observed pathway is a special case or part of a broader rule.<\/p>\n Empty space now looks less like a silent backdrop and more like an active participant in building the mass and structure of visible matter.<\/p>\n Physicists still do not know the full mechanism, but they finally have a signal that follows vacuum-born order all the way into detectable particles.<\/p>\n The study is published in the journal Nature<\/a>.<\/p>\n \u2014\u2013<\/p>\n Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.<\/p>\n Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"Researchers have detected particle pairs emerging directly from the vacuum during high-energy proton collisions, providing the clearest evidence…\n","protected":false},"author":2,"featured_media":540117,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[2302,90,56,54,55],"class_list":{"0":"post-540116","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-physics","8":"tag-physics","9":"tag-science","10":"tag-uk","11":"tag-united-kingdom","12":"tag-unitedkingdom"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/540116","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/comments?post=540116"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/540116\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media\/540117"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media?parent=540116"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/categories?post=540116"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/tags?post=540116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}