The higgs boson the w and z bosons are the carriers

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Unformatted text preview: henkova, wastrying to understand the string 9608085 theory… that appears between two quarks. It l 9902033 trassler,ater led to connections between QCD and quantum gravity that we still don t fully understand.   The Weak Force and the Higgs Boson   The properties of the weak force are intimately tied with the Higgs boson. The Higgs Boson   The W and Z bosons are the carriers of the weak force. They are like the photon – the quanta of light. But they are massive.   The reason they are massive is the same reason all the other fundamental particles are massive: the Higgs The Higgs Condensate   The Higgs condensate fills the vacuum of space, rather like the BoseEinstein condensate shown below   The Higgs condensate acts like treacle through which other particles must move. In fact, all particles are actually massless. But their interaction with the Higgs condensate gives them mass. The Higgs Condensate   A common analogy used is that of a famous person moving through a crowded room   Different particles get stuck in the condensate by different amounts. But why? What gives rise to the vast difference in masses of the particles? We don t know… The Higgs Boson   The Higgs boson is a particle. It can be thought of as a ripple of the condensate, or a splash in the treacle which fills all of space.  The Higgs boson was finally discovered in July 2012. It weighs around 125 to 126 GeV.   The next step is to check the various properties of the Higgs to see if they agree with our theoretical understanding LHC @ CERN       Ring: 27 km circumference and 100 m underground. 1232, 34 ton superconducting magnets for beam 36,000 tons of coolant below 2K. LHC   Protons collide at 8 TeV centre of mass energy   Two multi-purpose detectors: ATLAS and CMS   Track particles, measure energy   600 million collisions per second 10 Petabytes of data a year (= 20 km high stack of CDs!)   New Physics?   The LHC has discovered the Higgs. But what next?   For various reasons (known as the Hierarchy Problem) we think (hope) that the Higgs will have companion particles. This will be the first physics beyond the Standard Model.     (See http://www.damtp.cam.ac.uk/user/tong/talks/tss.pdf for a presentation on this subject, albeit one with more pictures than words) This is the next goal for the LHC…find new physics....
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This document was uploaded on 03/03/2014.

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