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Dec
23
comment How to handle Yukawa contractions in calculating SUSY beta functions?
Thanks a lot Dr Motl, now I managed to go through all one-loop and some two-loop calculations :) All the best Sir.
Nov
15
comment Which SUSY models are affected by the recent LHCb result?
Thanks indeed for this. Dr. Motl's answer helps a lot. Especially the comment that models requiring large $\tan \beta$ and squarks below 1 TeV. But I hope to get a more elaborative answer here.
Sep
20
comment mSUGRA boundary conditions and the MSSM
@user788171 $m_{H_u}^2$ is negative at the weak scale, allowing electroweak symmetry breaking radiatively. I suggest that you read Martin's reference that I mentioned earlier.
Sep
19
comment mSUGRA boundary conditions and the MSSM
@Anirbit I believe I was reading Martin's Susy primer: arxiv.org/abs/hep-ph/9709356.
Sep
13
comment Hierarchy is no problem and susy is a mathematical tool for data fitting
I know I asked this long ago, but what I understood from you and Lubos and Matt, that there is a real hierarchy problem in the SM. But what about those who say, if there's nothing but the SM, then there's no problem at all since the theory is normalizable?
Sep
13
comment Why does the running of the gauge couplings show $\frac{1}{\alpha}$ > $\frac{1}{\alpha_w}$ at low energy?
The plots that you are seeing and asking about are plotting the inverse of $\alpha's$. So, nothing is messed up. The larger will become smaller, and the smaller will become larger when you take the inverse of things.
Sep
9
comment Observation of violation of the uncertainty principle?
Thanks Dr Motl for the answers and the link to your blog post.
Sep
9
comment Observation of violation of the uncertainty principle?
Thanks Qmechanic!
Jun
29
comment Non linear QM and wave function collapse
Can you explain to us what is the probabilistic ontology and what is the issue of global rescaling?
Jun
28
comment Negative and positive energy and Hawking
@jaskey13 I honestly have no idea. I hope I could understand the argument of this whole issue.
Jun
28
comment Negative and positive energy and Hawking
About the zero energy universe, there's a good discussion here: mathoverflow.net/questions/38659/total-energy-of-the-universe
Jun
28
comment Hierarchy is no problem and susy is a mathematical tool for data fitting
@MattReece I hope you consider adding an answer for the benefit of all. Especially about the mass-vev confusion.
Jun
23
comment How can I explain why the weak nuclear interaction between individual nucleons is 'weak'?
-1: a number of people won the Nobel prize for their work on these two interactions!
Jun
20
comment How exactly does time slow down near a black hole?
Your last remark reminded me of the twin paradox. So the one who returns to Earth will be back in the future? To me the situation you described is similar in principle, right?
Jun
19
comment Sources for new experimental limits on susy models?
@dmckee I can do this, but it's always better to be up-to-date, hence my enquiry.
Jun
19
comment Sources for new experimental limits on susy models?
Thanks Anna for the links, and I surely know Lubos's blog (who doesn't? :p). I usually prevent myself from visiting vixra because, at this stage, I fear I won't be able to tell if what I'm reading is trustable or not.
Jun
17
comment Sources for new experimental limits on susy models?
Thanks for your answer, the links and the blog. I'm still a novice with regards to reading experimental results and plots, but I certainly should learn how to get the info from the papers. Anyways, I also found this: twiki.cern.ch/twiki/bin/view/AtlasPublic/CombinedSummaryPlots which contains what I was particularly looking for (the new limit on gluino)
Jun
14
comment Is QCD free from all divergences?
I don't undersand this too!! I learned all this divergence/regularization/renormalization stuff from calculating the QCD $\beta$-function which amounts to calculating a number of ultraviolet divergent integrals!!
Jun
10
comment How did ancient physicists around 500 BC decide that the earth is spherical?
There's another way, the shadow of Earth on the moon.
Jun
9
comment Why is E6 favored over E8 for GUT building?
what was the title :p ? Thanks for asking this question anyways. I learned from it.