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I'm a physics grad student just trying to figure out all this stuff like everyone else.


Jul
3
comment Cutoff regularization: Why not cutoff exactly at the momentum reached in an experiment?
The fact that we are integrating over all loop momentum to begin with means that these momenta are not constrained to a maximum value by momentum conservation.
Jun
18
comment Is there a non-technical way to understand why proving confinement is difficult?
@Bru - I am puzzled by what you are asking for. You have essentially already answered your own question in a single sentence right at the start - 'We are not able to solve QCD at low energies is because it is a strongly coupled quantum field theory' i.e. there are no small parameters to do perturbation theory in. Are you asking for someone to explain this sentence in more detail?
May
9
comment Derivation of the volume element (which uses the metric tensor)?
Towards the end of Chapter 2 of Sean Carroll's lecture notes: preposterousuniverse.com/grnotes
Apr
30
awarded  Fanatic
Apr
16
comment Higgs boson/field symmetries and local symmetries
Some people have researched an `accidental' global symmetry. See Little Higgs: arxiv.org/abs/hep-ph/0512128
Apr
16
comment Do objects have energy because of their charge?
It not clear to me what you are asking. Are you asking if charge and energy are the same thing? Or if charge creates energy somehow?
Apr
14
comment Photon as the carrier of the electromagnetic force
As for your second question:math.ucr.edu/home/baez/physics/Quantum/virtual_particles.html
Apr
13
comment Solving the soliton equation without energy
What do you mean E is missing? Scrednicki has simply found a minimum of E by writing it as a sum of positive definite quantities, and then extremizing (making E as small as possible). The minimum for E will be when the first term in 92.5 is zero.
Apr
13
comment About the seesaw mechanism
@twistor59 - I was a little worried that the redefinition might be anomalous. Maybe its not, or maybe it just doesn't matter, or maybe its not anomalous because the gauge group is SU(2).
Apr
12
comment About the seesaw mechanism
Scrednicki pg556 web.physics.ucsb.edu/~mark/ms-qft-DRAFT.pdf states that you can just take $\nu \rightarrow i\nu $ to get ride of the phase. This clearly takes care of the sign of the mass term, and does't change the kinetic term since that will pick up a factor of $(+i)(-i) = +1$. Off hand its not clear to me this doesn't affect any other terms in the Lagrangian or doesn't create any anomaly issues...but apparently its ok.
Apr
12
comment About the seesaw mechanism
I get the minus sign you are talking about, and so does wikipedia en.wikipedia.org/wiki/Seesaw_mechanism. I am thinking about if this matters or not...
Apr
12
comment Units for physical constants
Also related, perhaps a duplicate of: physics.stackexchange.com/questions/8373/…
Apr
12
comment Units for physical constants
Related: physics.stackexchange.com/questions/10709/…
Apr
12
comment Time inside a Black hole
That assumes you can somehow observe the clock ticking on the inside of the black hole while standing on the outside. So I don't know what sort of meaning you can ascribe to clocks ticking on the inside of a black hole. Perhaps an expert (which I am not) can step in.
Apr
12
answered Time inside a Black hole
Apr
12
answered The paradoxical nature of Hawking radiation
Apr
11
comment Potential in Relativistic Scalar Field Theory
@QFTdreamer - the transformation you are asking for was giving in a prior answer to another question of yours. See physics.stackexchange.com/questions/52590/…
Apr
11
awarded  Yearling
Apr
11
revised Potential in Relativistic Scalar Field Theory
added 908 characters in body
Apr
9
answered Potential in Relativistic Scalar Field Theory