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The history of high energy physics is in the words "high energy" . There are two ways to get it, building higher and higher energy accelerators or studying cosmic rays, which last has answers in another question. Accelerators are of two types, those creating beams of particles that fall on fixed targets, and colliders, having two beams collide. All ...


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As pfnuessel said in his comment: The first thing to look at was the Higgs - there were hints from LEP and Tevatron, but no evidence, so the LHC was designed that the (SM-)Higgs has to be seen, if it exists. And for everything beyond the Higgs - we don't know! There are various theories, e.g. the different flavors of super-symmetry and others, but they all ...


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The Higgs is inferred from its decays - no Higgs bosons themselves are actually detected. As such, an experiment can count the number of Higgs boson decays to a particular final state, if it can measure the particles in that final state. For that reason, it is impossible to measure $\sigma$ or the branching ratios independently, you can only measure $\sigma ...


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The Figure 2 of this paper http://arxiv.org/pdf/hep-ph/0611148v1.pdf doesn't show a factor-of-ten difference at all! Extract the ratio properly on the log scale and you will see it is less than four, just slightly greater than 1/2 of the height corresponding to the decade. Note that 1/2 of the weight corresponds to the factor of $\sqrt{10}\sim 3.16$. ...



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