K-computer predicted the existence of a "de-Omega" exotic particles
Based on complex simulations of quantum chromodynamics, made using K computer, one of the most powerful in the world, scientists HAL QCD Collaboration predicted the existence of a new type of "dibaryon" - particles containing six instead of three quarks. The study of these elements helps scientists understand the interaction of elementary particles under extreme conditions, such as neutron stars or the bowels of the first moments of the universe after the Big Bang.
The particles, known as baryons - actually protons and neutrons, - quark consist of three closely related to each other, and their charge depends on the "color" quark. Dibaryons - is essentially a system with two baryons. In nature, there is a well-known dibaryon - deuteron, the nucleus of deuterium (heavy hydrogen) with protons and neutrons that are very weakly bound. Scientists have long questioned whether other dibaryons exist, but have not yet found any.
In a paper published in Physical Review Letters, a team of scientists used a powerful theoretical and computational tools to predict the existence of a "very strange" dibaryon consisting of two "Omega baryons", each of which contains three strange quarks. They called it "de-Omega." It was also suggested to look for these strange particles in experiments with collisions of heavy ions, planned in Europe and Japan. Forecast managed to do thanks to a random combination of three elements: improved methods of QCD calculation, improved simulation algorithms and more powerful supercomputers.
The first essential element is the new theoretical framework called "time-dependent-HAL QCD method": it allows scientists to determine the force acting between baryons, a large volume of numerical data collected using the computer C.
The second element - a new computational method, uniform compression algorithm that allows you to efficiently calculate the system with a large number of quarks.
The third element - the appearance of supercomputers. Computer To allow fast calculation of a large number of variables. But it took almost three years to bring the scientists to the conclusion that "di-Omega."