Recent content by mike372

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    Graduate Rigorous Quantum Mechanics text or online

    http://arxiv.org/abs/quant-ph/0605180 www.phy.uct.ac.za/people/horowitz/Teaching/lecturenotes.pdf The first also has a few recomended texts at the top. Also can try Dirac's original book. In many way's outdated but the math concepts are there.
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    Graduate Why should we work with gauge theories

    I think the real reason is that they offer a very concise theoretical description of nature that AGREES WITH EXPERIMENT. After all this is THE key requirement of a successful theory of nature. Since the advent of the standard model, it has been realized that the em, weak and strong force all...
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    Graduate Why in general speaking the mass of gauge boson is zero?

    The reason gauge bosons are massless is exactly because they are GUAGE bosons. That is they obey a gauge symmetry which forbids mass terms in the Lagrangian (since we require the action to be gauge invariant - not change under gauge transformations). However the mass terms in the Lagrangian...
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    Graduate If neutrinos are everywhere, why isn't Cherenkov's Radiation?

    The standard understanding of Cherenkov radiation is that it is produced when a (electrically) CHARGED particle passes through a medium at a speed faster the the speed of light in that medium. So neutrinos do not produce this type of radiation simply because they are not charged...
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    Graduate What is the global significance of a 5-sigma Higgs signal?

    I would highly recommend Matt Strassler's Higgs FAQ to answer some of this: http://profmattstrassler.com/articles-and-posts/the-higgs-particle/360-2/ Note he talks about the Higgs field. This is THE important thing that is being looked for at the LHC. We know (without doubt) there must be...
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    Graduate Why can't the muon decay into up and down quarks?

    Might also be useful to think in terms of Feynman diags. The u and d quarks will play a role at higher loop orders. The muon goes to W + neut. Now the W can go to a u d pair but they do not have enough energy to hadronise so the pair just exist as a virtual loop which go back to W which then...
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    Graduate Feynman rules (vertecies) for graviton

    These were calculated for KK gravitons in large extra dimensions in arXiv:hep-ph/9811350 . For normal gravitons just use the zero mode solutions.
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    Graduate Is every Hamiltonian necessarily Hermitean?

    It seems there do exist non-hermitian hamiltonians with real eigenvalues. These are known as PT-symmetric hamiltonians and have been developed by Carl Bender, see these reviews: arXiv:hep-th/0703096v1 arXiv:0810.5643v3