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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
ZapperZ
1 24,842
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...
Jul18-14 12:32 PM
ChrisVer
187 56,597
What is the importance of dual electromagnetic field tensor? Generally this is not included in the action. What will...
Mar19-09 09:50 PM
hodgedual
20 10,422
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
humanino
13 2,155
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 1,694
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
silverslith
9 3,345
According to Noether Theorem, Every symmetry corresponds to a conversation Law in the nature. For example: If...
Mar21-09 01:50 PM
genneth
37 5,170
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 4,071
Is there any on-line reference which describes the interaction of high energy (> 100 Mev) gamma rays with matter. ...
Mar10-09 10:28 PM
humanino
8 1,864
are antimatter particles the explanation for why particles in a bubble chamber seam to disappear? ive read some on...
Mar14-09 05:39 AM
malawi_glenn
8 1,487
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
Phrak
8 1,699
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
flatmaster
28 2,811
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 4,016
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 1,334
(correct me if i state anything wrong) the weak interaction only works on left handed particles and right handed...
Mar23-09 01:39 AM
turin
21 5,791
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 1,370
does a computer equation exists that can predict the mass of atomic and sub-atomic particles?
Mar17-09 03:03 PM
Norman
21 3,324
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
hamster143
11 1,663
I am reading a paper right now on lattice QCD that presents a "method ...
Mar13-09 11:08 PM
Bobhawke
3 1,660
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 2,227
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
granpa
6 2,902
Hi everybody When fast neutrons hit isolated protons (eg. hydrogen cores in paraffin) the neutrons kinetic energy...
Mar15-09 12:00 PM
Astronuc
2 2,069
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 1,452
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 1,212
Hello! I was wondering if someone could help me with a problem of units! I'm currently deriving probability...
Mar16-09 09:33 AM
clem
1 1,904
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
bomanfishwow
6 1,440
Even though classical (as opposed to quantized) non-abelian gauge theories do not have any physical applications at...
Mar17-09 02:02 PM
confinement
2 1,602
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
malawi_glenn
5 1,875
Hello, I looked around before and could not find an answer to this question. So given the reaction neutron +...
Mar17-09 09:46 PM
hamster143
1 3,878
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
malawi_glenn
2 1,302
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
rppearso
3 1,087
I do a regular check through the new papers on arxiv and today I came across this http://arxiv.org/abs/0903.3176 ...
Mar21-09 06:23 AM
Fra
8 1,984
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 3,103
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 1,707
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
Bobhawke
2 1,428
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
Orion1
4 2,222
I have never really understood the approximate 'Custodial symmetry' in the Standard Model. I've seen it being...
Mar22-09 12:25 PM
blechman
1 3,607
can someone please explain the attached picture to me? if the electron and positron are just annihilating each other...
Mar22-09 12:47 PM
humanino
9 2,679
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
rntsai
12 2,512
There are two things about this identity that I dont understand: 1. Why is it equivalent to a statement of charge...
Mar23-09 09:34 AM
xepma
2 2,818
So i was sitting here thinking about plasma. I started to wonder, if we create some plasma, lets assume we have it...
Mar23-09 02:18 PM
alexgmcm
1 983
The nucleon and antinucleon are each about seven times more massive than the pion How is it conceivable that the pion...
Mar23-09 08:22 AM
humanino
2 1,159

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