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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
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 57,504
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 24,994
Hello! I'm not entirely sure this is very "scientific", but I have an idea that I would like some feedback on. I...
T 01:12 AM
Whyisthat21
3 467
So I've been researching Dense Plasma Focus devices for a while now and a question just occured to me. Since the fill...
Y 10:31 PM
Warpspeed13
2 833
Although I am a newer publishing thread here, I notice this forums for a long time. And I hope someone could help...
Y 09:13 PM
zhangguoqiang
0 111
Binding energy is typically used to talk about the amount of energy needed to separate bound particles. This means...
Y 06:47 PM
Drakkith
5 232
I would like to ask, to make it clearer to me, what does chirality means? and how can someone see whether his theory...
Y 05:01 PM
Greg Bernhardt
1 905
What's the difference between a neutrino and a Muon? Will a neutrino induce fusion the same as a muon? Does muon...
Y 07:42 AM
Orodruin
7 159
So depleted uranium is mostly U-238 which can't sustain a chain reaction. If you were to compress depleted uranium to...
Jul27-14 11:23 PM
Warpspeed13
21 1,379
Take a look at the attachment, my question is obvious from the colored points. The attachment is from:...
Jul27-14 07:57 PM
ChrisVer
0 182
I am trying to derive the algebra and I get a factor of 2 wrong... Consider the Lorentz group elements near the...
Jul27-14 02:40 PM
samalkhaiat
9 691
The action for Yang-Mill's theory is often written as $$ S= \int \frac{1}{4}\text{Tr} (F^{\mu \nu} F_{\mu \nu})d^4 x...
Jul27-14 02:12 PM
samalkhaiat
2 208
I have three questions about ICF, in the explanations i have read on the internet about ICF they all explain that the...
Jul27-14 10:50 AM
the_wolfman
1 306
http://en.wikipedia.org/wiki/Inelastic_collision An inelastic collision, in contrast to an elastic collision, is a...
Jul27-14 08:27 AM
Vanadium 50
2 201
A charged lepton can absorb a W+ boson and be converted into a neutrino, and visa versa. The neutrino has such small...
Jul25-14 08:39 PM
ChrisVer
4 547
Hey everyone i'm new here and this is my first thread, although i have great interest in chemistry and physics my...
Jul25-14 06:53 PM
mfb
2 386
So I've done some research, but to no avail. Can anyone link me to some reasonably detailed information regarding the...
Jul25-14 06:36 PM
mfb
6 660
i searched Steven weinberg in google scholar. it returns many articles but "a model of leptons" why does "a model of...
Jul25-14 11:09 AM
rar0308
0 252
Three questions, In a femtosecond laser, or any laser for that matter, how is a pulse generated from noise? how do...
Jul21-14 01:49 PM
inkskin
0 502
Sorry for my questions, (it does seem like QFT triggers quite a lot of questions :-D). Anyway, on page 103 (it has...
Jul21-14 01:49 AM
MathematicalPhysicist
7 1,470
I understand that, for example, a thick enough sheet of lead can absorb gamma radiation, but I want to understand what...
Jul20-14 05:42 PM
mathman
1 721
https://lh4.googleusercontent.com/-MODAPtaDFhY/U8utJMbxycI/AAAAAAAAWcQ/TtLYdzqeoLM/w266-h259-no/IMG_20140720_075036.jpg...
Jul20-14 09:50 AM
anorlunda
2 657
I am new to QFT and found myself wondering the following. Particle physics experiments usually consist of looking at...
Jul20-14 04:57 AM
DarMM
7 2,552
I read some of the articles related to particle physics experiment and don't know the meaning of it. 1. minimum...
Jul19-14 04:50 PM
mfb
3 818
I had an argument at my university about it, since experiments at LHC aren't 100% confirmed. I mean, gauge theories...
Jul19-14 04:14 PM
tahlaskerssen
9 943
Hi all! I am not sure how to prove mathematically that the expression for the probability that a neutrino...
Jul18-14 08:50 AM
Trifis
7 2,198
When a proton collides with a proton say at the LHC, is vacuum field theory used? It seems like you shouldn't have to...
Jul17-14 04:48 PM
mfb
4 1,673
I don't understand why antimatter exists in the first place. Could you explain why and how an asymmetry developed...
Jul16-14 04:59 PM
phinds
7 2,424
In a comment http://motls.blogspot.com.es/2014/07/cms-sees-650-gev-leptoquarks.html#comment-1479399237 to Motl's blog,...
Jul16-14 07:11 AM
arivero
5 1,504
Hi. on page 95 , I am not sure how did he derive the second term on the RHS of equation (13.16). ...
Jul15-14 11:36 AM
MathematicalPhysicist
4 1,297
If one has a 4-fermion vertex, like in Fermi theory : ##G_f (f_1 \Gamma f_2)(l_1 \Gamma l_2)## And you are...
Jul15-14 08:39 AM
Hepth
2 1,149
Since plants contain proteins that help them identify gravity in order to grow the right way, and they also contain...
Jul14-14 04:13 PM
Ryan_m_b
13 2,165
I was curious as to the difference in free neutron decay and the lack of decay when bound in a nucleus. I found the...
Jul14-14 03:53 PM
mfb
5 1,598
Greetings to all I had some problems using MCNP5 for gamma shielding calculation. The original input file is from a...
Jul14-14 02:11 PM
salmankhan
14 4,131
Hi. I am currently studying about representations of Lie algebras. I have two questions: 1. As I understand, when...
Jul12-14 11:00 PM
spookyfish
11 2,454
Hello, I have a gamma spectrum of one element (X). There are several gamma peak in the spectrum. For example, 800...
Jul10-14 03:19 PM
mfb
14 3,077
I'm stucked in a passage of Particle Physics (Martin B., Shaw G.) in page 41 regarding neutrino oscillations. ...
Jul10-14 03:15 PM
George Jones
6 2,140
How can someone think of the neutrinos as non relativistic? OK I understand for example that the neutrino temperature...
Jul9-14 04:55 PM
Orodruin
13 2,848
Wikipedia says CERN has isolated about 38 atoms of antihydrogen and maintained them for over 15 minutes? ... Do you...
Jul9-14 03:59 PM
SteamKing
5 2,268
Annihilation results in an extreme burst of energy..... If enough antimatter is isolated, it can be utilized for...
Jul9-14 02:49 AM
Syed Ammar
5 2,002
Hi I am trying to find the equations of a charged particle inside a dipole & quadripole. Practically, I need to...
Jul8-14 09:34 PM
Vanadium 50
6 1,840
"The question is very simple: do matter and antimatter obey the same laws of physics?.??
Jul8-14 02:28 PM
ChrisVer
4 1,930

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