Scientists of the European Organization for Nuclear Research CERN found in data collected at the time of the experiment LHC-B detectors of the Large Hadron Collider , the traces of two new , previously unknown particles. At the same time , one of these particles has such a unique set of properties that do not have any other particle , and which have not been observed until now none of the scientists . These new particles that received the names DS3 * ( 2860 ) – and DS1 * ( 2860 ) – belong to the class of mesons and have a mass three times superior to the mass of the proton .
Physicists involved in the analysis of experimental data LHC-B, conducted the study of energy burst, first detected in the experiment ‘BaBar’, conducted in 2006 by scientists at Stanford University in California. Despite the best efforts of scientists to scientific equipment of that time did not allow to establish the exact cause of the energy bursts. “Our results also indicate that the causes of the so-called bursts BaBar are two new, unknown until recently, particle” – says Tim Gershon a physicist at the University of Warwick, United Kingdom.
We remind our readers that the mesons – subatomic particles is made up of two quarks , and which scientists believe are indivisible particles. Quarks in these particles associated force of strong interactions , one of the four types of fundamental forces , the force that holds together and all the elements of the atomic nuclei . This force is one of the least understood parts of the scientists of the Standard Model of particle physics , a theory describing the structure and interactions of elementary particles.
It is known that the quarks are six different types , called flavors of quarks are up, down, strange, charm , true and lovely that differ in mass and some other properties. New particles DS3 * ( 2860 ) – and DS1 * ( 2860 ) – made up of a charmed antiquark and a strange quark . It is noteworthy that the particle DS3 * ( 2860 ) – is set back, is three, and it is the first particle , came to the attention of scientists , comprising the charmed quark and possessing such a spin value .
In other types of mesons, quarks can be arranged in several different ways, which can give the spin of the particle is less than or equal to three, but making ambiguous values of the other properties of the particles. However, the particle DS3 * (2860) – devoid of any ambiguity due to the fact that it has a precise and clear structure. That is why this particle is an ideal candidate for further research force strong nuclear interactions. In addition, a sufficiently large particle mass DS3 * (2860) – will produce more accurate and direct measurement and calculation, than other particles with lower mass.
Two new particles have been discovered by scientists from the team LHC-B experiment by using the method of analysis of Dalitz plot. This method, which has never previously been used to analyze the data collected at the LHC will allow scientists to divide the peak surge BaBar into two components, track and visualize the different ways that can go a certain particle decay .
“After we have successfully applied the method of analysis of the Dalitz plot for the LHC-B experiment data , nothing prevents us to use a similar analysis on other sets of data collected by other experiments Collider ” – says Tim Gershon , – “I hope that this approach will find more many other new particles and to understand how they relate to each other . “
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