Category Archives: Higgs

Special showing of the film Particle Fever, Fri. April 25

A new film about the discovery of the Higgs Boson, followed by an audience Q&A.


particle fever

From the Particle Fever website:

Imagine being able to watch as Edison turned on the first light bulb, or as Franklin received his first jolt of electricity.

For the first time, a film gives audiences a front row seat to a significant and inspiring scientific breakthrough as it happens. Particle Fever follows six brilliant scientists during the launch of the Large Hadron Collider, marking the start-up of the biggest and most expensive experiment in the history of the planet, pushing the edge of human innovation.

As they seek to unravel the mysteries of the universe, 10,000 scientists from over 100 countries joined forces in pursuit of a single goal: to recreate conditions that existed just moments after the Big Bang and find the Higgs boson, potentially explaining the origin of all matter. But our heroes confront an even bigger challenge: have we reached our limit in understanding why we exist?

Directed by Mark Levinson, a physicist turned filmmaker, and masterfully edited by Walter Murch (Apocalypse Now, The English Patient), Particle Fever is a celebration of discovery, revealing the very human stories behind this epic machine.

Nobel Prize for Higgs Mechanism

This year’s Nobel Prize for physics went to Fran├žois Englert and Peter W. Higgs “for the theoretical discovery of a mechanism that contributes to our understanding of the origin of mass of subatomic particles, and which recently was confirmed through the discovery of the predicted fundamental particle, by the ATLAS and CMS experiments at CERN’s Large Hadron Collider.” It was a long time coming, but now with the Higgs boson in hand the work begins to find out exactly what type of Higgs boson it is and if any of its properties suggest the existence of other new particles or even new principles of Nature.

Francois Englert Francois Englert

Peter Higgs Peter Higgs

Nobel Prize winner Gerardus `t Hooft will give a special lecture on “The Higgs Particle.”

 

Prof. Gerardus `t Hooft

The talk will be held on Thursday Sept. 5, 2013 at 7:30 pm in the UC Davis Medical Education Building at 4610 X Street in Sacramento.

Professor `t Hooft desribes the talk as follows:

Our theoretical understanding of the sub-atomic world would not be complete without the Higgs particle. Sometimes called “The God Particle”, this very special particle generates the differences between the fundamental particles and it gives them mass, but until recently it went undetected. Of course, in science we use different words. In this lecture it is explained what this mysterious object really is and why it is needed in our theories, even if it has little to do with God. Using the most powerful particle accelerator in the world, the Large Hadron Collider, physicists for the first time have the tools to produce and observe this particle in detail. Is it as it was predicted? Are there whole families of Higgs particles? The LHC has not yet reached its full power. Will it provide us with more clues or mysteries about the sub-atomic world?

more info

Higgs Discovery Update

An update on the Higgs-like resonance discovered last summer was given by the ATLAS experiment on Dec. 13, indicating that the decay to two photons is about 2 standard deviations off of the standard model value, which may indicate that there are additional new particles within reach of the Large Hadron Collider.


The largest discrepancy is in the Higgs-like boson decaying to two photons (H → γ γ).

Discovery of a Higgs-like boson

On July 4, CMS and ATLAS announced the discovery of a Higgs-like resonance. An unstable boson quickly turns into other more stable particles, in this case the clearest signal shows up in the boson decaying to two photons or four charged particles like electrons, muons, and their antiparticles. The two experiments saw a characteristic enhancement (a.k.a. a resonance or “bump”) in both of these types of decays.


An single event in the detector that may have been the two photons resulting from decay of the resonance.


The boson shows upas a bump the distribution of two photon decays.