Search Results for 'LHC'

Looking for Extra Dimensions at the LHC

September 7, 2012 | By | 16 Comments

Phd Comics, channeling physicists Daniel Whiteson and Jonathan Feng, explains how the LHC isn’t anywhere near done yet. Now that the Higgs(like) boson has been found, we’ll be looking for all sorts of other things, such as extra dimensions of space.

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New Physics at LHC? An Anomaly in CP Violation

November 14, 2011 | By | 29 Comments

Here in the Era of 3-Sigma Results, we tend to get excited about hints of new physics that eventually end up going away. That’s okay — excitement is cheap, and eventually one of these results is going to stick and end up changing physics in a dramatic way. Remember that “3 sigma” is the minimum […]

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The LHC, the Tevatron, and the Higgs Boson

July 27, 2011 | By | 92 Comments

A few weeks back I wrote about the remarkable milestones passed by the Tevatron and LHC, and prognosticated that if there was ever a time when new discoveries could come out rapidly, this was it, especially for the LHC experiments analyzing a data sample 30 times larger than the previous one. The result? Nature is […]

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Milestones for the Tevatron and LHC

June 18, 2011 | By | 28 Comments

This past week saw two big milestones for the two big operating high energy particle colliders in the world. At these machines, we measure the number of collisions with the rather arcane unit of “inverse barns”, which is essentially a measure of inverse cross sectional area. It’s just like if you are throwing darts at […]

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LHC to Run in 2012

January 31, 2011 | By | 4 Comments

The Large Hadron Collider is currently (or at least, once it gets off winter break) smashing protons together with an energy of 7 trillion electron volts. The original plan was to work at twice that energy, and the engineers think they can upgrade the machine to achieve it — but only after a year-long shutdown. […]

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LHC – First Inverse Picobarn!

August 10, 2010 | By | 10 Comments

Back in May, I gave a talk at the annual Phenomenology Symposium at UW Madison, showing some of the first physics results from the CMS experiment. At that point we had a data sample of proton-proton collisions corresponding to 1 inverse nanobarn. This past weekend the LHC crossed a major threshold: 1 inverse picobarn delivered […]

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Baby Steps for the LHC

April 28, 2010 | By | 12 Comments

Since March 30, when the LHC at CERN first collided protons at an unprecedented total energy of 7 TeV (7 trillion electron volts) the machine has been steadily moving from crawling to walking. Last Saturday, I’d say it took its first steps, and like any toddler, will soon be running. The plot shows what we […]

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LHC Physics Begins!

March 30, 2010 | By | 19 Comments

Just after 1 pm European time today, the LHC at CERN collided two beams of protons with a total center-of-mass energy of 7 TeV (seven trillion electron volts), three and a half times more energy than the proton-antiproton collisions at the Tevatron at Fermilab, and far greater than the 2.4 TeV achieved by the LHC […]

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Decision for the LHC: 1 Inverse fb at 7 TeV or Bust!

January 29, 2010 | By | 32 Comments

Last week in Aspen we learned that this week would be when a major decision was reached by CERN at the annual Chamonix meeting as to how to operate the LHC at high energy. Following the magnet quench incident in September 2008, a year-long shutdown ensued for repairs to the magnets, and retrofitting of the […]

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The LHC Surpasses the Tevatron in Energy…But What About Power?

November 30, 2009 | By | 16 Comments

Today the LHC at CERN became the planet’s highest-energy particle accelerator, surpassing the Tevatron by 20%. The LHC accelerated protons from the injection energy of 0.450 TeV (0.45 trillion electron volts) to 1.18 TeV; the Tevatron has collided protons and antiprotons with beam energies of 0.98 TeV . As early as Wednesday the LHC team […]

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