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Apr
27
comment Are units of angle really dimensionless?
what about the second 'no'? Can you explain it?
Apr
17
comment Can $E=mc^2$ be derived from the Minkowski spacetime metric? $s^2=x^2+y^2+z^2-(ct)^2$?
Basically you are asking if,or why, the metric in position space is or implies the same metric in momentum space. Good question.
Apr
14
comment Shouldn't the Uncertainty Principle be intuitively obvious, at least when talking about the position and momentum of an object?
By the way, Galilean parabole is very nice to consider energy time indetermination.
Apr
13
comment How does SUSY avoid to create non-Lorentz interactions?
Hmm sorry I was not paying atention... so you really say that a four boson becomes a Yukawa? Fascinating.
Apr
12
comment How does SUSY avoid to create non-Lorentz interactions?
Sorry, I told it in reverse. Is there some emoticon for embarrassed?
Apr
12
comment How does SUSY avoid to create non-Lorentz interactions?
What about the fermion-boson-boson vertex in the MSSM? Does it never generate a boson-fermion-fermion?
Apr
12
comment How does SUSY avoid to create non-Lorentz interactions?
Perhaps a good enough answer could be to use the superparticle formalism and expand a superparticle 3-legs vertex to show why the non-Lorentz terms do not appear.
Apr
12
revised How does SUSY avoid to create non-Lorentz interactions?
added 151 characters in body
Apr
12
comment How does SUSY avoid to create non-Lorentz interactions?
Indeed the question is how does it keep being Lorentz inv. Do the bad terms cancel with others, or just it happens that they are never generated, to start with?
Apr
12
asked How does SUSY avoid to create non-Lorentz interactions?
Apr
11
comment Is there some special case where a fermion can mediate a force?
I would expect that some regularisation technique for the four-leg fermi interaction could be using this kind of fermion loops. But by becoming a boson, they already allow to substitute the zero-range by a finite range. A regularisation keeping the property of "zero range" would be a lot more interesting.
Feb
10
comment What makes water heavier than air?
It is not only the dipole and bonding, also on the other hand HH, NN and OO have very simple, almost ideal gas, properties. But up with your answer, it is the only non-tautological one :-)
Feb
10
answered What makes water heavier than air?
Oct
19
comment Is there supersymmetry between Dirac and Klein Gordon solutions?
@user2309840 I was thinking on something coming from QFT, and preferentially 3+1 QFT. Relativistic QM looks an acceptable answer if nobody is going to try to explain via 3+1 one-particle states, but it should still explain how the transform KG--->Dirac--->KG becomes a translation. Note that articles on "Susy QM" are usually about a different subject, pairs of potentials without really considering Spin or spacial translations.
Oct
18
comment Is there supersymmetry between Dirac and Klein Gordon solutions?
Possible references iaea.org/inis/collection/NCLCollectionStore/_Public/28/002/… sciencedirect.com/science/article/pii/0370269382906116 inspirehep.net/record/109550?ln=es
Oct
17
comment Are all conservative forces a central force?
Gravity on flat earth surface.
Oct
16
revised Is there supersymmetry between Dirac and Klein Gordon solutions?
minor format
Oct
16
asked Is there supersymmetry between Dirac and Klein Gordon solutions?
Oct
15
comment Why does a remote car key work when held to your head/body?
The skeptic answer, in the skeptics SE, is horrible :-( Armchair quoting from internet, plus standard blurb about confirmation bias. Tell about groupthinking to these guys.
Oct
15
revised Why is the contribution of a path in Feynmans path integral formalism $\sim e^{(i/\hbar)S[x(t)]}$
added 406 characters in body