If you like star trek or similar science fiction, you have probably heard of the term, "space-time continuum". Well it is a real thing, as is time, and yes the definition of time still works for all of our day to day scheduling of events and activities. When things start moving near the speed of light or are in a strong gravitational field, time might seem to go awry.
We all have a good appreciation for length, width and height. As fundamental as these three dimensions are to our understanding of the world around us, modern science tells us that these are mixed into time itself.
The reported observation of a resonant state of a J/psi meson and a proton in the decay of the Lambda_b baryon by the LHCb collaboration, broadcast by CERN today, is a very intriguing new piece of the puzzle of hadron spectroscopy - a topic on which many brilliant minds have spent their life in the course of the last half century.
The CERN Director General Rolf Heuer issued the following statement today, reporting the discovery of exotic pentaquark states by the LHCb collaboration:
Geneva, 14 July 2015. Today, the LHCb experiment at CERN’s Large Hadron Collider has reported the discovery of a class of particles known as pentaquarks. [...]
Working as an experimental particle physicist in a large scientific collaboration, such as the 3000-strong CMS experiment at the CERN LHC, is a (not too uncommon) privilege, for several reasons.
One of those reasons is of purely numerical kind: the number of publications that bear your name grows by the day, and may reach four-figure values in the course of a couple of decades (I am about to cross that point with my publication list, in fact). But what value do those thousand articles have for the sake of assessing your value as a scientist ? Very little, indeed, and in fact all the selection to which I have participated in my career required one to specify one's specific contribution to all the papers one wished to boast about.
Quarks and antiquarks are the teeny, tiny building blocks with which all matter is built, binding together to form protons and neutrons in a process explained by quantum chromodynamics (QCD).
According to QCD, quarks possess one of three charges that allow them to pair in various combinations, such as mesons--elementary particles composed of one quark and its corresponding antiquark. Force carrier particles, known as gluons, hold the quarks together by exchanging and mediating the strong forc e, one of the four fundamental forces.
This structure is the foundation of all matter in the universe, but much is still unknown about why QCD works the way it does.
When you create an energetic collision between two protons, as the Large Hadron Collider does at large rates and very high energy, the question is what is the chance that a rare process is generated. In the quantum world, everything that is possible is also mandatory - but it happens with a probability that is sometimes very hard to calculate.
Apologizing for a hiatus due to vacations, I am posting today a tentative logo of the Marie-Curie network I am coordinating, AMVA4NewPhysics. A brief explanation of the symbols at the basis of the logo is given below, in order for you to propose changes or even help by offering different ideas (and if you're a graphic designer, then maybe you consider producing a better one for us ?).
The most popular form of radiation detector used is probably
the Geiger-Mueller (GM) detector. A GM
detector is typically the device seen being used on TV shows and movies when
measuring radiation. The GM detector is the
device which is making clicking noises which clicks faster and faster when it
is exposed to increasingly greater amount of radiation.
Quantum computing is well into its second decade of hype with little progress being made. Computer chip companies have continued to optimize available physics and have left the quantum kind to the academic sandbox. It's not stable long enough to make calculations.
Perhaps what is needed is an intermediary to transmit information, say
researchers at the Okinawa Institute of Science and Technology Graduate University (OIST).
A simple and provocative title – The Missing Memristor has Not been Found! This harsh admission of reality without sugar coating is the very title, and not of some opinion piece, but of a scientific paper published by the very same Nature Publishing Group that is criticized right away in that very paper: