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Aidan Randle-Conde | Université Libre de Bruxelles | Belgium

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Advent Calendar 2012 December 20th

Friday, December 21st, 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!

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Advent Calendar 2012 December 19th

Thursday, December 20th, 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/

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Advent Calendar 2012 December 18th

Thursday, December 20th, 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

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Advent Calendar 2012 December 17th

Thursday, December 20th, 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.

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Advent Calendar 2012 December 16th

Wednesday, December 19th, 2012

What’s the deal with the X(3872)? Why are we still finding new mesons at low mass? There’s still new physics to be found at lower energies!

Apologies to CDF for not mentioning them by name, they saw a very clear signal for the X(3872) as well!

Some excellent talks on the X(3872) can be found in the Charm 2010 conference: http://indico.ihep.ac.cn/conferenceOtherViews.py?view=standard&confId=1452

I’m still playing catch-up! More to come tomorrow.

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Advent Calendar 2012 December 15th

Wednesday, December 19th, 2012

15 is for… erm… T-violation. Why does time prefer one direction over the other? We don’t know the full answer, but we do have some hints from the quark sector.

Paper on the arXiv: http://arxiv.org/abs/1207.5832

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Advent Calendar 2012 December 14th

Wednesday, December 19th, 2012

14 is for 14TeV, what we had planned for the LHC. So this video is all about how we glimpsed into the distant and not so distant future of particle physics. We need to keep looking ahead, the LHC is not the end of the journey!

Some links from the CERN public page about the accelerator complex and history:
Accelerator complex:
http://public.web.cern.ch/public/en/research/AccelComplex-en.html
http://public.web.cern.ch/public/en/research/SPS-en.html
http://public.web.cern.ch/public/en/research/LEP-en.html
http://public.web.cern.ch/public/en/LHC/LHC-en.html
http://public.web.cern.ch/public/en/research/CLIC-en.html

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Advent Calendar 2012 December 13th

Sunday, December 16th, 2012

13 is for… well 13 squared is 169, which is almost 173.5, which is for the mass of the top quark in GeV. So let’s talk about the top quark!

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Advent Calendar 2012 December 12th

Friday, December 14th, 2012

The 12 days of Higgsmas! I can’t sing, but I made this anyway. Enjoy!

Images taken from:
12
Bubble chamber, Interactions, http://www.interactions.org/cms/?pid=2100&image_no=CE0057

11
Marie Curie, Wiki, http://en.wikipedia.org/wiki/Marie_Curie
Positron, Wiki, http://en.wikipedia.org/wiki/Positron
J/Psi, Duke, http://www.phy.duke.edu/~mehen/ECT/talks.html
SuperKRings, UC Irvine, http://www.ps.uci.edu/~tomba/sk/tscan/pictures.html
sin2beta, Imperial, http://www3.imperial.ac.uk/highenergyphysics/research/experiments/babar
ALEPH & CDF, Fermilab, http://home.fnal.gov/~skands/plain.html
HERA, DESY, http://hasylab.desy.de/images/content/e8/e72/index_eng.html
Higgs & Englert, ATLAS, http://www.atlas.ch/photos/collaboration-meetings.html
Feynman, http://www.richard-feynman.net/gallery.htm
Thomson, MaNEP, http://www.manep.ch/en/technological-challenges/nanotubes.html
SLAC, Fermilab, http://www.fnal.gov/pub/today/archive_2004/today04-06-18.html
Bevatron, Wiki, http://en.wikipedia.org/wiki/File:Bevatron.jpg

10
Omega discovery, CERN, http://teachers.web.cern.ch/teachers/archiv/HST2001/bubblechambers/omegaminus.pdf

9
UTFit, http://utfit.org/UTfit/
CKMFitter, http://ckmfitter.in2p3.fr/www/results/plots_moriond12/ckm_res_moriond12.html

8
Gluon discovery at PETRA, ICEPP Tokyo, http://www.icepp.s.u-tokyo.ac.jp/news/epsprize-e.html

7
7TeV collision CMS, CMS, http://cms.web.cern.ch/news/new-two-particle-correlations-observed-cms-detector-lhc
7TeV collision LHCB, CERN Courier, http://cerncourier.com/cws/article/cern/42331
7TeV collision ATLAS, http://www.atlas.ch/photos/events-collision-proton.html
LHC Control Room, CERN Bulletin, http://cdsweb.cern.ch/record/1246424
Lumi, CMS, http://cms.web.cern.ch/news/summary-2011-p-p-running

6
R plots, PDG, http://pdg.lbl.gov/2012/figures/figures.html
Top quark, Cornell, http://www.lepp.cornell.edu/Research/EPP/CMS/CornellCMSPhysics.html

5
ATLAS events, ATLAS,http://www.atlas.ch/photos/events-collision-proton.html
CMS events, CMS, http://cms.web.cern.ch/news/cms-search-standard-model-higgs-boson-lhc-data-2010-and-2011

4
ATLAS, ATLAS, http://atlas.ch/atlas_photos/fulldetector/fulldetector_02.html
CMS, ExtremeTech, http://www.extremetech.com/extreme/140513-cern-the-higgs-boson-unfortunately-is-behaving-exactly-as-we-expected
LHCb, Fermilab Today, http://www.fnal.gov/pub/today/archive_2007/today07-07-05.html
ALICE, ALICE, http://aliceinfo.cern.ch/Public/Welcome.html

3
Line width plot, ALEPH, Delphi, L3 , OPAL and SLD, http://arxiv.org/pdf/hep-ex/0509008v3.pdf
OPAL event display, Cambridge University, http://www.hep.phy.cam.ac.uk/drw/pix/opalpics.html
Delphi event display, Delphi, http://delphiwww.cern.ch/delfigs/export/pubdet4.html

2
Liquid crystals viewed with polarized light, about.com, http://chemistry.about.com/od/growingcrystals/ig/Crystal-Photo-Gallery/Liquid-Crystals.-MuZ.htm

1
CMS plots, CMS, http://cms.web.cern.ch/news/observation-new-particle-mass-125-gev
ATLAS plots, ATLAS, http://www.atlas.ch/news/2012/latest-results-from-higgs-search.html

Everything else: Made on my laptop with SVG, PHP, Powerpoint and patience

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Advent Calendar 2012 December 11th

Thursday, December 13th, 2012

11 rhymes with 1927, so let’s talk about the fifth Solvay Conference!

See some of video footage of the conference itself: http://www.youtube.com/watch?v=8GZdZUouzBY

Although the Heisenberg matrix method and Schrodinger wave mechanics had already been reconciled in 1926, and most physicists had come to a consensus shortly after the Solvay Conference, Bohr and Einstein continued to disagree. They discussed their disagreements extensively in the famous Einstein-Bohr debates, and this culminated in the famous EPR paradox in 1935. The resolution of the paradox would not come until long after Einstein had died. You can read Einstein’s infamous paper here: http://prola.aps.org/abstract/PR/v47/i10/p777_1

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