- #26

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This is exactly my point.But maybe at least a pointer in some broad direction?"

I like this phrase very much.But I did it by working my way from small to large, not from starting at the large from the beginning."

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- #26

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This is exactly my point.But maybe at least a pointer in some broad direction?"

I like this phrase very much.But I did it by working my way from small to large, not from starting at the large from the beginning."

- #27

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100% agree :)Tbh, I too am surprised by this remark. A student beginning a PhD is, by definition,not"mature as an independent researcher".

Your 2nd sentence is probably true only after one completes a PhD (though it can sometimes take longer).

If a beginning PhD student is not allowed to ask others for advice about topics, then wtf is the supervisor for?

- #28

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Very interesting theory...https://en.wikipedia.org/wiki/Massive_gravity

It´s an interesting topic, since it has interaction with high energy physics, cosmology (both theoretical and observational) and potentially also with beyond the standard model physics.

Hope you find it useful. :D

- #29

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- #30

haushofer

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- #31

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Thanks Abdul Aziz, Fermion masses problem seems really interesting. I also went through your nice PhD thesis about this problem in GUT’s. But I’m not sure about your idea of connecting Neutrino masses to cosmology brother… Do you mean one can find a cosmological mechanism during inflation or due to DM, to determine neutrino mass?

- #32

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I am not sure what this means. If we quantize GR, I know of course that we end up with a massless spin 2 graviton. Here, we treat the metric as a quantum field so it is clear that general covariance leads to a gauge symmetry in the quantum theory we obtain. But let's say with start with quantizing a spin 2 classical field in a flat spacetime. We may have a gauge symmetry which priori has nothing to do with spacetime coordinate transformation and general covariance. Is the author saying that consistency of a massless spin 2 theory automatically leads to a condition on the spacetime it evolves through? Even if initially the spin 2 particle has nothing to do with a metric? Or am I completely missing the point?

Thanks in advance.

- #33

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Thanks... really great notes.