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The climate experiment is called CLOUD, which gives a strong hint of what it's about, although the name stands for Cosmics Leaving Outdoor Droplets. Earth is under constant bombardment by cosmic rays, and it's been theorized that these play a role in cloud formation by seeding tiny water droplets. It isn't an easy process to study in the real atmosphere with real cosmic rays, so CERN is creating its own cosmic rays with the accelerator. These are then fired into an artificial atmosphere, where their effects can be studied much more closely. Making antimatter

According to the physics magazine CERN Courier, the LHC has also found around 60 previously unknown hadrons, which are complex particles made up of various combinations of quarks. Even so, all those new particles still lie within the bounds of the Standard Model, which the LHC has struggled to move beyond, much to the disappointment of the numerous scientists who have spent their careers working on alternative theories. The first tantalizing hints that a breakthrough might be just around the corner came in 2021 when analysis of LHC data revealed patterns of behavior that indicated small but definite departures from the Standard Model. The Compact Muon Solenoid (CMS) pictured here can capture images of particles up to 40 million times per second. (Image credit: xenotar via Getty Images) This is a beautiful time, you know, because the best time to be an experimentalist is when the theorists have run out of ideas. Because then anything we discover is new,” said David Newbold, who directs the particle physics program at Rutherford Appleton Laboratory in the U.K. and is currently leading an effort to upgrade one of the main detectors at the LHC.However, the price of exploring the unknown often doesn’t come cheap. With at least a 10-figure price tag, scientists and engineers are debating whether the endeavor will be worth the investment. The good The LHC smashes particles together at high speeds, creating a cascade of new particles, including the infamous Higgs boson. (Image credit: Ket4up via Getty Images) First introduced during the late 1960s and early 1970s, supersymmetry looked promising due to its mathematical elegance and its ability to explain why gravity appears to be much weaker than the other fundamental forces and to resolve other mysteries such as dark matter.

In 2012, the Institute of High Energy Physics of the Chinese Academy of Sciences announced a plan to build the next great supercollider. The planned Circular Electron Positron Collider will be 100 kilometers around, almost four times larger than the Large Hadron Collider, or LHC. Then in 2013, the LHC's operator, known as CERN, also announced their plan for a new collider, named simply the Future Circular Collider. When Run 3 commences we can expect a whole new spate of discoveries, so it's a good time to take a closer look at what makes the LHC — and the rest of CERN — so unique. What is the Large Hadron Collider?Over 12 years after it entered service, the LHC is still the world's biggest and most powerful particle accelerator. But it won't hold that record forever. Several countries have plans to go a step further, including China's Circular Electron Positron Collider and the International Linear Collider in Japan.

All of those phenomena, as well as many others, cause subatomic particles to be flung across space. Mostly consisting of protons, those particles travel the lengths of the universe, stopping only when an inconvenient bit of matter gets in their way. For various reasons over the years, people have speculated that experiments at CERN might pose a danger to the public. Fortunately, such worries are groundless. Take for example the N in CERN, which stands for "nuclear", according to UK Research and Innovation (UKRI). This has nothing to do with the reactions that take place inside nuclear weapons, which involve swapping protons and neutrons inside nuclei. Tian Yu Cao, a philosopher of science and politics from Boston University, is pessimistic about the future of China's Circular Electron Positron Collider, or CEPC. He pointed to China’s last Five-Year Plan published in 2016, which did not mention the CEPC among the 10 flagship projects announced in the report. While physicists know they cannot know the results without building the instruments and doing the experiment, the economics of such exploration is more open to debate. What kind of price are we willing to pay for a better understanding of our universe?

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The LHC forward (LHCf) detector, located close to the ATLAS interaction point, uses particles thrown forward in collisions as a means of simulating cosmic rays under laboratory conditions. Further, along the beam trajectory is the Forward Search Experiment (FASER), designed to look for light, weakly interacting particles that are likely to elude the larger detectors.

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