Its name is Y(4260) and it is not a new humanoid of Stars Wars, but a particle identified for the first time by BaBar experiment: an international collaboration - formed by the large participation of the Italian physicists of the National Institute for Nuclear Physics (Infn) - that has its seat in Stanford (California). Y(4260) represents an interesting element with respect of particles’ field and it will provide very useful signs about character of the strong force, that is the force that holds together the different particles inside atomic nuclei. The discovery, announced during the international symposium “Lepton Photon” just finished in Uppsala in Sweden, has been presented today during a meeting of the Supervising Committee of Babar experiment that this year has taken place in Rome, by the seat of Infn Headquarter.
“At first sight Y(4260) seems to be what we call a charmonic state, that is to say a particle made up of the combination of a charm quark and of its equivalent antiparticle: an anticharm quark”, explains Marcello Giorgi, Infn researcher, professor of Physics at Pisa University and involved in Babar experiment since a long time.
Physicists have known since some time that for each particle, an antiparticle exists, nearly identical in all aspects, except for some properties that are opposite. The antiparticle of the electron is for instance the positron, named also antielectron, provided with positive electric charge, rather than negative. During the 50’s it was although discovered that particles can be made up also of the combination of a fundamental particle and its corresponding antiparticle. “The first case was the positronium one, made up of the combination of an electron and a positron. The first charmonium, that is to say a particle made up of a charm quark and anti-charm, was instead discovered at the same time in Brookhaven and at Slac, both in the USA, by Samuel Ting and Burton Richter, awarded with the Nobel in 1976: its existence it was soon afterwards confirmed thanks to the analysis of the data produced in Italy by the National Laboratories of Frascati of Infn. As time passed, it was realized that charmoni are a real family of similar particles, but with a different mass. Nobody had been able to observe Y(4260) up to now, not only because there is a little possibility to produce it in the accelerators used today by physicists, but also because it is extremely unstable”, explains Mauro Morandin, Infn researcher and national spokesman of BaBar experiment.
Marcello Giorgi | alfa
Tune your radio: galaxies sing while forming stars
21.02.2017 | Max-Planck-Institut für Radioastronomie
Breakthrough with a chain of gold atoms
17.02.2017 | Universität Konstanz
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
21.02.2017 | Earth Sciences
21.02.2017 | Medical Engineering
21.02.2017 | Trade Fair News