A new measurement by a student and professor at the University of Rochester has shed new light on the limits of scientists standard model of physics. Doctoral student Ben Kilminster and Kevin McFarland, professor of physics, used the particle accelerator at Fermilab to conduct the first measurement ever done with enough precision to discern certain characteristics of how the top quark, the heaviest particle in known physics, decays. The work is reported in todays issue of Physical Review D.
The findings suggest there is no connection between the top quark and the weak nuclear force--an idea that had been attractive because the unusually high and similar energies of the top quark and the weak forces particle, the W-boson, stood out from the rest of the known particles. A link between the quark and the boson would have strongly suggested that the top quark held a special place in the quantum world, perhaps as a kind of "father" of the weak force, which is responsible for the characteristics of all known matter.
"No one has made this kind of measurement as precisely, and the findings are laying another brick in our knowledge of how the universe works," says McFarland. "People are trying desperately to understand why the weak force is weak. At the beginning of the universe, it and the force that is responsible for light, among other things, were essentially one and the same; but now, light can cross the cosmos, but the weak force cant even cross an atom. Weve come up with a lot of theories as to why this is, but these new findings mean that a lot of those theories are going to have to be crossed off."
Jonathan Sherwood | EurekAlert!
Researchers at Fraunhofer monitor re-entry of Chinese space station Tiangong-1
21.03.2018 | Fraunhofer-Institut für Hochfrequenzphysik und Radartechnik FHR
Taming chaos: Calculating probability in complex systems
21.03.2018 | American Institute of Physics
In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.
In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...
Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...
19.03.2018 | Event News
16.03.2018 | Event News
13.03.2018 | Event News
21.03.2018 | Physics and Astronomy
21.03.2018 | Materials Sciences
21.03.2018 | Life Sciences