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High Energy, Nuclear, Particle Physics

- Properties, relationships, and interactions of subatomic particles. Exp. & theo. physics of nuclei & elementary particles
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Jan16-12 Greg Bernhardt
rules Sticky Thread Pinned: Forum Rules
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Feb23-13 08:41 AM
1 25,754
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...
Jul18-14 12:32 PM
187 61,736
Anyone of you guys read this month's Scientific American?? The one on that our inflationary model of our Universe may...
Mar9-09 02:34 AM
23 3,182
What is the importance of dual electromagnetic field tensor? Generally this is not included in the action. What will...
Mar19-09 09:50 PM
20 10,506
There seems to be a strong theory that the electron could be a 'naked' singularity or maximal Kerr black hole (maximal...
Mar8-09 06:43 PM
George Jones
11 4,826
Any ideas here? For that matter, why should the spin of each particle always be the same? Or can we do no better...
Mar9-09 02:31 AM
20 7,923
If quantum gravity exists, then gravitons are responsible; however, it seems to me as if a body of matter would need...
Mar10-09 08:46 PM
13 2,182
I want to get myself clear on sometihng fundamental, so please correct any of my thinking. As I understand it, an...
Mar13-09 08:35 PM
Bob S
10 1,713
I'm having some doubts about the standard idea of N14 + energetic Neutron > C14 + Proton. Is it possible that the...
Mar15-09 10:25 PM
9 3,412
According to Noether Theorem, Every symmetry corresponds to a conversation Law in the nature. For example: If...
Mar21-09 01:50 PM
37 5,211
I have a decent understanding of neutron-induced reactions in heavy nuclei (fission, capture), but less so when light...
Mar11-09 07:33 PM
Bob S
3 4,168
Some papers I am looking over at the moment mention both additive and multiplicative renormalisations. What is the...
Mar9-09 06:21 PM
5 5,673
Is there any on-line reference which describes the interaction of high energy (> 100 Mev) gamma rays with matter. ...
Mar10-09 10:28 PM
8 1,897
are antimatter particles the explanation for why particles in a bubble chamber seam to disappear? ive read some on...
Mar14-09 05:39 AM
8 1,511
Would anyone notice (unless they were looking for it) that the mass of a particle species had a span, rather than a...
Mar11-09 01:44 AM
8 1,725
I know not far in the past that that largest particle accelerator yet created was set to be activated. Can anyone...
Mar17-09 06:28 PM
28 2,853
In Antimatter production in a labratory, does anyone know the principle element used to generate antimatter such as...
Mar11-09 08:15 AM
Vanadium 50
3 4,083
Ok, well I'm sorry if this is the wrong section but it has to do with energy and nuclear physics. I have to present...
Mar11-09 06:31 PM
Bob S
3 1,351
Hello all, lets think we have a segmented gamma-ray detector. when a gamma-ray interacts several segment of the...
Mar12-09 02:50 PM
Bob S
1 1,383
does a computer equation exists that can predict the mass of atomic and sub-atomic particles?
Mar17-09 03:03 PM
21 3,360
1. The Standard model is an SU(3)xSU(2)xU(1) symmetric theory. To me this means that if you choose any 3 members of...
Mar13-09 02:42 PM
11 1,698
I am reading a paper right now on lattice QCD that presents a "method ...
Mar13-09 11:08 PM
3 1,680
The Gell-Mann - Nishijima relation can be rearranged to show that there is an absolutely conserved quantity which is...
Mar14-09 12:27 PM
Jonathan Scott
3 2,484
the strong interaction's range is 10-15m, but because gluons are massless shouldnt it be infinite? is it something to...
Mar17-09 12:54 PM
6 2,938
Hi everybody When fast neutrons hit isolated protons (eg. hydrogen cores in paraffin) the neutrons kinetic energy...
Mar15-09 12:00 PM
2 2,100
Hi, I've been measuring the flux of cosmic ray muons as a function of zenith angles. I have calculated the flux but do...
Mar17-09 05:02 AM
Vanadium 50
1 1,469
Sorry for this being a really general question but I am a bit confused what it means when it is stated that a particle...
Mar17-09 08:08 AM
Meir Achuz
3 1,233
Hello! I was wondering if someone could help me with a problem of units! I'm currently deriving probability...
Mar16-09 09:33 AM
1 1,911
Hi, I'm trying to remind myself of exactly what, physically, is the difference between V and A couplings. Now, a...
Mar17-09 05:32 AM
6 1,462
Even though classical (as opposed to quantized) non-abelian gauge theories do not have any physical applications at...
Mar17-09 02:02 PM
2 1,626
The Higgs boson couples to all particles with mass. But even a photon has, through E=mc^2, an equivalent mass....
Mar21-09 03:07 AM
5 1,903
Hello, I looked around before and could not find an answer to this question. So given the reaction neutron +...
Mar17-09 09:46 PM
1 3,899
I have a very basic question regarding the nucleus. I understand why you can only have a limited number of protons...
Mar18-09 01:34 AM
2 1,307
For thoes of you in the E&M/optics fields of physics/math/EE what are you standard references and standard...
Mar19-09 02:24 PM
3 1,099
I do a regular check through the new papers on arxiv and today I came across this ...
Mar21-09 06:23 AM
8 2,018
Penning trap upper limit for the electron particle radius: r_e \leq 10^{-22} \; \text{m} QED Compton wavelength...
Mar20-09 09:08 AM
Doc Al
21 3,144
I think of all of the energy losses associated with macroscopic collisions and wonder how significant this effect is...
Mar20-09 03:45 PM
Bob S
7 1,731
Im trying to learn about instantons at the moments from Cheng and Li's book. It seems to suggest that instantons only...
Mar22-09 01:53 AM
2 1,442
how is a penning trap used to determine the upper limit of the electron radius. google hasnt been much help. I...
Mar20-09 09:30 PM
4 2,254
I have never really understood the approximate 'Custodial symmetry' in the Standard Model. I've seen it being...
Mar22-09 12:25 PM
1 3,626
can someone please explain the attached picture to me? if the electron and positron are just annihilating each other...
Mar22-09 12:47 PM
9 2,698
seems like a basic question and I'm sure many would answer that these are all "spin-1" particles...but that's not...
Mar22-09 04:55 PM
12 2,550

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