Russia and the United States have made a revolutionary discovery in the field of nuclear physics – Ghhauto: Russian top stories

27.02.2016 14:14

The Russian and American nuclear physicists of the DZero collaboration announced the discovery of an exotic “rainbow” particle consisting of four quarks all four of their “color” , RIA Novosti

DZero Collaboration, which is working with the Tevatron detector, announced the opening of a new, unexplored before, exotic particles – Tetraquarks containing a quarks all four “colors”, says the article, which is published in the electronic Cornell University library.

The American collider Tevatron, which was built in 1983 in Illinois, was the most powerful accelerator in the world up to the launch of the Large hadron collider – the energy of the collision it was about 2 teraelectronvolt. Five years ago, the accelerator was stopped, but now physicists have completed the data analysis, which for 10 years were collected by detectors CDF and D0. These detectors monitor the results of collisions of protons and antiprotons.

The international team of physicists, including a number of Russian scientists from Moscow State University. MV University and institutes of the Academy of Sciences, has presented today the results of analysis of the data, which were collected by the detector D0 for all the work the Tevatron when observing the collapse of the rarest of particles – so-called “strange” B-mesons

According to modern ideas, everything. elementary particles consist of small objects that physicists call quarks. Protons, neutrons and other “heavy” particles called baryons contain three quarks. Their smaller cousins, the so-called mesons contain two elements -. “Normal” quark and antiquark, the basic component of antimatter

As scientists tell us, the data accumulated in recent years, the LHC and the Tevatron show that ” soup “of elementary particles, which are produced during collisions between ions and protons in these colliders, can occur not only classic mesons and baryons, consisting of the three” building blocks “quarks, but also exotic and Tetraquarks pentaquarks.

Scientists from the collaboration DZero opened data Tevatron signs of unusual “rainbow” Tetraquarks X (5568), consisting of quarks of all four colors – “top” quark, “lower” anti-quark, “charming” quark and a “strange” anti-quark. This particle has a very large mass – it is heavier than the recently discovered at the LHC “diabolical” pentaquarks, despite the fact that it is less than one quark.

Tetraquarks similar device as the scientists explain, making them more confident in the existence of these particles than in the case of pentaquarks and other “candidates” on the role of the “quartet quark”, since all they have to contain a quark and an antiquark of the same color. This has led many physicists to believe that other particles are in fact a kind of “molecules” of two mesons, and not uniform or penta Tetraquarks

The existence of these particles, scientists have no doubt -. The statistical accuracy of the opening of five sigma , which is equivalent to a random error or malfunction of the detector in one case, six million attempts. Further study of the X (5568), as participants DZero hope, will help you understand how to construct the particle as it decays rapidly and any other Tetraquarks exist about the possible opening of which physicists say in the last 3-5 years.