The competitors in this racing are introduced in the previous entry about Galileos inclined plane experiments Galileo And Relativity - But More About Inclined Planes And Fun Simulations, which perhaps have not been really performed, but which we can find in museums.

Talking about relativity one should not forget Galileo's great contributions to - or perhaps in fact foundations of - physics. But more fun are Galileos researches on falling bodies and motion of projectiles, all mainly carried out by either real or Gedanken-experiments, the historians are not quite sure there.

But these Galileo experiments have been realized later and are both on YouTube and in Italian museums. 

Here is a schematic picture, the rolling ball will produce regular bell sounds.

A recent paper in the arxiv describes the observation, in 7 TeV proton-proton collisions produced by the LHC collider in the core of the LHCb detector, of a new decay mode of the particle called "B-sub-s", a meson which is a bound state of a anti-bottom-quark and an s quark.

Did you ever wonder why both, Einstein’s relativity theory and quantum physics, in theory as well as experiment, seem obsessed with the nature of light? The velocity of light, light clocks, entangled photons, and so on – why is it always light? This preoccupation is no coincidence. It comes directly from the fact that light does not actually exist. Think I am nuts yet?

The origin of physical dynamics and the reason of existence of special relativity are explored. This endeavour is started by analysing the logic of nature. Next, only mathematics is used in order to explore the dynamics of this model of physical reality.

The model that is described here annihilates the old reality and creates a new reality at each dynamic step. Hilbert space cannot treat dynamics. It contains nothing that supports dynamics.
"The only use I know of a confidence interval is to have confidence in it"

L. J. Savage, in "The foundations of statistical inference", Methuen, London (1962).
A week ago a meeting was held in Chamonix to discuss in detail the schedule for the near future of the Large Hadron Collider, and to take a decision on the schedule, in particular for 2012.
"Lotteries are a tax on people who are bad at math"



Jan 29 2011 | 30 comment(s)

"Call it entropy [..] nobody knows what entropy really is, so in a debate you will always have the advantage.” -- Von Neumann to Shannon.

Have a look at below picture. You see a binary pattern. This pattern is formed by a hexagonal pattern of empty (yellow) spots and blue disks. The pattern repeats. If you carefully inspection the figure, you will discover that the repeating unit consists of 31 spots (with 15 of these empty, and 16 occupied). Let's consider a simple question: How many bits do you need to fully specify the image displayed?
Just a quick post today, to show the invariant mass distirbution of pairs of opposite-sign muons collected by the ATLAS and CMS experiment. Such plots are incredibly rich in information, as they contain the signal of ten different resonant states, and allow one to figure out the masses and production rates that these particles have, as well as the resolution of the detectors. I have shown an early such plot by CMS some time ago, but now the graph has been updated to contain all the relevant data collected in 2010 by the detector.