Category Archives: Particle Physics

Lisi and Weatherall in Scientific American: “A Geometric Theory of Everything”

“In 2007 physicist A. Garrett Lisi wrote the most talked about theoretical physics paper of the year. He argues that the geometric framework of modern quantum physics can be extended to incorporate Einstein’s theory, leading to a long-sought unification of … Continue reading

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Serpico at PPC-CERN: “Theoretical aspects of dark matter indirect detection”

“Dark Matter (DM) was already discovered indirectly: via gravity. But gravity is “universal” and does not permit particle identification: a discovery via electromagnetic, strong or weak probes is needed. The LHC at CERN was designed to study the electroweak (EW) scale, however there … Continue reading

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Gunion in ArXiv: A 4th generation is ruled out if the SM Higgs has mass below 200 GeV

John F. Gunion (University of California, Davis) claims in “Ruling out a 4th generation using limits on hadron collider Higgs signals,” ArXiv, 19 May 2011, that the Tevatron and LHC data have essentially eliminated the possibility of a 4th generation … Continue reading

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Haber on “Present status and future prospects for a Higgs boson discovery”

“The electroweak symmetry breaking dynamics of the Minimal Standard Model (MSM) employs a self-interacting complex doublet of scalar fields, which consists of four real degrees of freedom.  Three of this four degrees of freedom has been already observed in the … Continue reading

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Brumfiel in Nature, “Latest results from the LHC are casting doubt on the theory of supersymmetry”

“Supersymmetry is a theory that solves a host of problems with our understanding of the subatomic world, but there is growing anxiety that the theory, however elegant it might be, is wrong. Data from the Large Hadron Collider (LHC), a 27-kilometre … Continue reading

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A summary of “Chamonix 2011 LHC Performance Workshop”

Chamonix 2011 LHC Performance Workshop started last Monday, 24 January 2011. Next friday, 28 January, the final decision on the operation and performance of the LHC at CERN will be taking. The slides of the presentations, the majority only of technical interest, can be downloaded here. … Continue reading

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Twistors killed the Feynman diagram

Sing “Twistors killed the Feynman diagram” like “Video Killed the Radio Star,” by The Buggles. A theoretical physicist is a human Feynman’s diagram calculator, nearly by definition. “Richard Feynman’s famous diagrams allow the calculation of how particles interact. However, new mathematical tools,” … Continue reading

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