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Physics Stack Exchange users whose comments are worth studying include Lubos Motl and Ron Maimon (now at http://www.quora.com/Ron-Maimon and http://www.physicsoverflow.org/user/Ron+Maimon). Also see http://arxiv.org/abs/hep-ph/0207124 for a review of physics since the standard model.


Nov
22
comment Reference request: Hollow concave Earth hypothesis
I suggest that you try to find a university library which has physical copies of that issue of the journal, and then find someone at the university who can photocopy the article for you.
Nov
21
comment How much of the mass of a supermassive black hole comes from dark matter?
The main DM debate over quasars seems to be whether they are located in the biggest concentrations of DM or not. arxiv.org/abs/1305.2199 says not... For the other view, look up "dark gulping" for the idea that supermassive black holes formed from DM.
Nov
21
answered How much of the mass of a supermassive black hole comes from dark matter?
Nov
19
comment What is weak interaction? I need easy and short answer
The weak force is a very weak force between left-handed particles, that can also transform them (electron to neutrino, or vice versa; one quark to another type of quark).
Nov
14
comment Why do we need to find 5 Higgs Bosons to prove the existence of the dark matter?
Some of the other new particles in the supersymmetric standard model could be the dark matter. But the dark matter could also be something quite different, like right-handed neutrinos. So the reality is more the reverse of what you said or what you heard: if the dark matter is explained by supersymmetry, then there should be 4 more Higgs bosons out there.
Nov
14
comment Why do we need to find 5 Higgs Bosons to prove the existence of the dark matter?
Neuneck is saying the right thing, as is confirmed by all those upvotes... Three parts of the Higgs field become part of W+,W-,Z bosons. In the standard model, the Higgs field has 4 parts so one part is left over and that is "the" Higgs boson. In the supersymmetric standard model, there are two 4-part Higgs fields, so eight parts, so there are five different Higgs bosons left over after Ws and Z get their masses.
Nov
6
comment Hilbert Space of (quantum) Gauge theory
You would really need an infinite one-parameter family of Hilbert spaces, to reflect cutoff-dependence of all quantities. As for ghosts, they might be formally present in the Hilbert space, but projected out later.
Nov
3
comment Formulation and probability of a wave-function
A time-dependent wavefunction has the form "(psi at time zero) times (e to the -iEt)" only if "psi at time zero" is an energy eigenstate, i.e. predicts that energy value with 100% probability. Do you know about eigenstates yet?
Nov
3
comment Could dark matter be a kind of Goldstone boson?
Incidentally, Steven Weinberg recently suggested that Goldstones of a dark U(1) have left traces in the CMB along with the neutrinos, arxiv.org/abs/1305.1971
Nov
3
comment what does “medium-induced gluon radiation” mean
It's gluon radiation induced by a medium.
Nov
2
comment Black-hole firewall and holographic principle
It might be best if we created a room on chat.physics.SE or otherwise had a dialogue about these topics.
Nov
2
comment Black-hole firewall and holographic principle
But I also liked Mathur's fuzzball concept, which could imply that the black hole is generically an extended object reaching out to the horizon - that even with a giant black hole, the event horizon isn't just homogeneous empty space on either side...
Nov
2
comment Black-hole firewall and holographic principle
However, I am somewhat skeptical of this picture (original BHC), and very skeptical of firewalls. The recent papers by Papadodimas and Raju look more plausible to me - no firewall, the AMPS paradox is avoided by a nuance of how the boundary theory describes the black hole interior...
Nov
2
comment Black-hole firewall and holographic principle
If such a picture were true, rather than being an addendum to holographic duality on the boundary, I think it would be just a possible redescription of the "bulk" theory. That is, you wouldn't have a new boundary theory which was defined on "rectangle+circle" (edge of space but event horizon)...
Nov
2
comment Black-hole firewall and holographic principle
Hmm. I believe the original idea of black hole complementarity was that everything behind the event horizon is dual to degrees of freedom which pile up just outside the horizon, and then get re-radiated. So in the second picture, the Hawking radiation doesn't come from the other side...
Nov
1
comment The Higgs vacuum
There are aspects of QFT practice (the way physicists use it) which have never found mathematically rigorous formulation, I wonder if this is another example?
Nov
1
answered Have we found a Higgsino?
Nov
1
answered Black-hole firewall and holographic principle
Oct
31
comment Black-hole firewall and holographic principle
I disagree that someone could answer this question just by studying what experts say about firewalls. It requires some understanding of the holographic principle, maybe the membrane paradigm for black hole event horizons, and other concepts. I will answer if I can think of a reasonable thing to say.
Oct
28
comment A gentle introduction to CFT
The questions are being answered here: physicsforums.com/showthread.php?t=719388