48,932 reputation
230103
bio website
location Greece
age 74
visits member for 3 years, 7 months
seen 1 hour ago

Retired experimental particle physicist.

The picture is a fayum . It looks like aunts and cousins of mine :).


Aug
13
answered Are there two theories that are mathematically identical but ontologically different?
Aug
13
revised What are the main algorithms the LHC particle detectors use to reconstruct decay pathways?
added 241 characters in body
Aug
12
answered Can two single particles interfere with each other?
Aug
12
answered What does the Atomic Form Factor means?
Aug
12
revised What are the main algorithms the LHC particle detectors use to reconstruct decay pathways?
added 282 characters in body
Aug
11
answered Understanding EM Fields
Aug
11
answered What are the main algorithms the LHC particle detectors use to reconstruct decay pathways?
Aug
11
revised What trajectory has the Cosmic Microwave Background radiation taken to get to earth?
spelling
Aug
11
revised What trajectory has the Cosmic Microwave Background radiation taken to get to earth?
deleted 11 characters in body
Aug
11
answered What trajectory has the Cosmic Microwave Background radiation taken to get to earth?
Aug
11
revised Is the energy of a photon continuous/discrete?
added link
Aug
10
answered Is the energy of a photon continuous/discrete?
Aug
10
comment How do photons know they can or can't excite electrons?
I am dubious about the oscillating electromagnetic field business. The question is about photons. An electromagnetic field has an huge number of photons. The Schrodinger frame has a 1/r potential. The photon's electric field contribution is an impulse in a delta(t), not even a smooth time dependent potential. I have never seen this type of solution.Do you have a link? Once one gets into particles one uses Feynman diagrams I think
Aug
9
comment Why is it more convenient to consider space or time as a continuum?
I have the impression that discrete spacetime will not work with special relativity, which has been tested and validated at the limits of possible measurements. physics.stackexchange.com/q/33273
Aug
9
revised How can a metal heated at 600° emit thermal photons at 4000°+?
edit after comments
Aug
9
answered How do photons know they can or can't excite electrons?
Aug
8
comment Can we “fill” an atom with alpha particles?
confusion on both your houses. alpha is a nucleus. An atom is composed by a nucleus with charge q and it gathers around it the number of electrons necessary to sum to -q, so it is neutral. A larger nucleus can be modeled as containing alpha particles but this has nothing to do with the electrons other than charge balance. en.wikipedia.org/wiki/Nuclear_model#Nuclear_models
Aug
8
revised Does the the quantum field theoretic process of particle–antiparticle annihilation break the axioms of Special Relativity?
clarification and plot added
Aug
7
revised Does the the quantum field theoretic process of particle–antiparticle annihilation break the axioms of Special Relativity?
after edit of question
Aug
7
revised Does the the quantum field theoretic process of particle–antiparticle annihilation break the axioms of Special Relativity?
additional explanation after edit of question