Quantum of what? Physicists have been wrestling for more than a century with quantum mechanics, a set of rules that govern the behaviour of atoms and other small systems - small compared to a human being. As a matter of fact, even what quantum mechanics is about is not so obvious: first, because if everything … Continue reading Spooky Computers at CERN
Disclaimer: this is a blog post, not a paper. Seriously, I'm not suggesting to build such an accelerator, but I believe that by trying to answer this question the reader can learn something about the intriguing realm of accelerator physics. The Large Hadron Collider operating at CERN is the most powerful collider ever built by … Continue reading Why don’t we build a particle accelerator orbiting the Sun?
After the two sophons arrive on Earth, their first mission is to locate the high-energy particle accelerators used by humans for physics research and hide within them. At the level of science development on Earth, the basic method for exploring the deep structure of matter is to use accelerated high-energy particles to collide with target … Continue reading Has Particle Physics Been Hijacked by ET?
The big news in particle physics during the winter 2015-2016 is certainly the excess found by the ATLAS and CMS Collaborations in the invariant mass of two high-energetic photons in the data acquired in 2015 at a centre-of-mass energy of 13 TeV. If you don't know what I'm talking about, then it's time to catch … Continue reading A few thoughts about the 750 GeV diphoton bump
I waited few days before writing anything about the Nobel Prize for Physics 2013. As most people know at this point, this year the prize was awarded to François Englert and Peter Higgs "for the theoretical discovery of a mechanism that contributes to our understanding of the origin of mass of subatomic particles, and which recently … Continue reading Prof. Higgs, Pay me my money down!
Forewords My opinion about this issue shifts as more data are accumulated according to the Bayes theorem, so it may change in the near future after the LHC Run2 starts. Anyway, it seems to me that data are pointing towards J. A. Wheeler's self-aware Universe. What if the truth was that we are afraid of … Continue reading The Higgs Boson: A God Particle, After All?
Il primo layer dell'inner detector (ID) di ATLAS dista 4 cm dall'interaction point (IP), per cui: * pi0 decadono immediatamente (ctau~25 nm) e nel detector arrivano solo i gamma; * pi carichi hanno ctau~7 m ed entrano nell'ID; * K0_S decadono rapidamente (ctau~2.6 cm) e nel detector arrivano solo i prodotti di decadimento. il vertice dei K0_S e' una delle … Continue reading Conosci i tuoi mesoni