Advent Calendar 2012 December 23rd

23 12 2012

Particle physics is awesome enough all by itself. It gets even more awesome when we see the spin off technologies that have been developed over the decades!

The basics of radiation and hadron therapy are summed up quite well on wikipedia:
http://en.wikipedia.org/wiki/External_beam_radiotherapy
http://en.wikipedia.org/wiki/Particle_therapy
http://en.wikipedia.org/wiki/Proton_therapy

Images taken from:
Bragg peak: http://en.wikipedia.org/wiki/File:BraggPeak.png
Paul Scherrer Institut gantry: http://www.psi.ch/history-of-psi
Radiative therapy dose map: http://www.sciencedirect.com/science/article/pii/S0360301607005068

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Advent Calendar 2012 December 22nd

23 12 2012

What is cooler than cooling? Stochastic cooling!

A nice paper on stochastic cooling: http://arxiv.org/pdf/physics/0308044.pdf
Wiki page: http://en.wikipedia.org/wiki/Stochastic_cooling





Advent Calendar 2012 December 21st

21 12 2012

How could the LHC cause the end of the world?! Well… it can’t. It poses no threat at all to the fabric of the cosmos.





Advent Calendar 2012 December 20th

21 12 2012

When it comes to the Standard Model the g-2 measurements give us both the best agreement between theory and experiment, and one of the biggest discrepancies that just won’t seem to go away! Lepton universality is one of the most stringently tested symmetries we have, and yet it does not stand up to the most precise measurements. This is a very big hint that there should be new physics out there!





Advent Calendar 2012 December 19th

20 12 2012

How does the moon affect the LHC? What about the TGV and LEP?

LEP and the moon: http://jwenning.web.cern.ch/jwenning/documents/EnergyCal/tide_slrep.pdf
LEP and the TGV: http://cds.cern.ch/record/309231/files/sl-96-036.pdf
LHC and the moon: http://www.quantumdiaries.org/2012/06/07/is-the-moon-full-just-ask-the-lhc-operators/





Advent Calendar 2012 December 18th

20 12 2012

There are probably only three generations of matter. Why is this? How do we know? That would happen if there was a fourth generation? The Z boson holds the answers!

Plot taken from http://pdg.lbl.gov/2012/reviews/rpp2012-rev-cross-section-plots.pdf





Advent Calendar 2012 December 17th

20 12 2012

The discovery of the J/Psi in 1974 changed the world of particle physics forever! The discovery of the fourth quark was great evidence in support of the quark model of hadrons and Cabibbo’s quark mixing.