2,736 reputation
624
bio website
location
age 67
visits member for 3 years, 8 months
seen Jan 10 '12 at 15:28

Jul
2
awarded  Curious
Mar
19
awarded  Nice Answer
Nov
2
awarded  Yearling
Oct
1
awarded  Nice Answer
Aug
20
awarded  Nice Answer
Mar
25
awarded  Nice Question
Jan
4
awarded  Nice Answer
Jan
1
awarded  Nice Answer
Nov
29
awarded  Popular Question
Nov
2
awarded  Yearling
Oct
23
awarded  Good Answer
Jun
8
awarded  Caucus
Jan
5
awarded  Taxonomist
Nov
2
awarded  Yearling
Oct
3
comment Is it true that quantum mechanics technically allows anything to happen?
You know, to me this is actually an interesting question, which it will take some precision and subtlety to discuss properly. As an aside, what is the level of education of the questioner, and his/her friends? I have known a least one biology Nobel Laureate who disagreed with me about this. A way of restating the question might be, "Are all quantum mechanical propositions necessarily probabilistic?" Lederberg said yes. I very much appreciate the comment below, that events with 0 measure could also actually happen.
Sep
10
comment Why are the antimatter compositions of neutrons and protons different? Why by about 1%? References?
I assume that as well as gluons, a considerable amount is also carried as kinetic energy of the various particles. I would accept these two answers, but would like to first ask some "ab initio" people for their results, which may be better because of all the nonlinearities at the low quark energies involved. By the way, how low is that in nuclear matter at rest?
Sep
1
revised Why would Antimatter behave differently via Gravity?
deleted 238 characters in body
Aug
23
comment What are the average matter, antimatter, and binding energy composition of protons and neutrons?
Having read a (very) little, I now assume that the 0 momentum limit will require ab initio calculations because at 0 momentum the situation is highly non linear and non peturbative approaches must be used.
Aug
23
comment What are the average matter, antimatter, and binding energy composition of protons and neutrons?
Thank you for this very patient and helpful answer, which teaches me much. Is there anyway to extrapolate this down to 0 momentum probes, e.g. nucleons in a glass of water? Does nuclear structure in the higher elements change the zero momentum limit situation much? For the zero momentum limit, are we forced back to ab initio calculations?
Aug
22
comment What are the average matter, antimatter, and binding energy composition of protons and neutrons?
Here is an example of the type of answer I was looking for, from quark.phy.bnl.gov/~pisarski/talks/Colloquia/Fodor.pdf (last slide) "95% of the mass of a proton comes from the kinetic energy within the proton: very different from any other mass" The standard model of particle physics (most particularly the theory of strong interaction, QCD) can explain this phenomena via a full ab-initio calculation of the masses. (controlling all systematic uncertainties)