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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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Feb23-13 08:41 AM
ZapperZ
1 20,991
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...
Jul11-12 01:13 AM
tom.stoer
178 34,135
I'm studying the \tau \rightarrow \rho \; \nu_{\tau} decay. I'm asked to calculate the decay width, using a...
Jun21-13 08:37 AM
GWSguy
2 1,233
Does anyone know of a site that lists particle half life times, all in one place?
Jun21-13 12:36 AM
Haborix
1 708
I could only find abstracts for proposals of methods that could accomplish this. I don't have any subscriptions to...
Jun20-13 05:26 PM
mfb
2 809
The leptons and hadrons carry the weak isospin charge. What allows the weak bosons do carry the charge? Is it because...
Jun20-13 03:47 PM
AlephClo
7 883
Hello everybody, I am a first year physics student and I have a question about the probability for 'heavy' nucleus to...
Jun19-13 09:53 AM
Bill_K
1 767
http://news.discovery.com/space/quirky-4-quark-quantum-monste-discovered-130618.htm Do you think this is legit? How...
Jun19-13 04:07 AM
mfb
2 1,159
can anybody help me to derive eqn. (9.19) of Srednicki's QFT book?
Jun18-13 06:40 PM
Haborix
3 769
Hi, I don't know very much about the weak force, but gravity, EM and the strong force all seem to apply an actual F...
Jun18-13 12:48 PM
Vanadium 50
13 1,130
So I have a bit of a story here. First of all, I work in my university's radiation safety department, where, among...
Jun18-13 03:16 AM
mfb
2 809
Hi, I'm trying to calculate the matrix element for the process g*q->q. I can't find the formula for polarization sum...
Jun17-13 01:18 PM
chamster
0 600
http://www.eurekalert.org/pub_releases/2013-06/vu-stm061013.php http://arxiv.org/abs/1211.0503 Anapole Dark Matter...
Jun17-13 12:56 PM
Mordred
5 884
Hello guys. I am studying the experiment conducted by Chamberlain, Segrč, Wiegand and Ypsilantis in 1955 at Berkeley...
Jun17-13 06:23 AM
Bill_K
10 937
Hello everybody! :shy: What is the strength of the strong force between, for instance, a proton and a neutron...
Jun15-13 06:09 PM
HakimPhilo
11 1,007
I'm in undergrad doing research with a professor. He's leaving for vacation for a few weeks, and has tasked me with a...
Jun14-13 11:01 PM
eigenstaytes
0 620
How can I prove by using the Lagrangian of some gauge theory (GWS say) that the vertex ##f \rightarrow f \gamma ##,...
Jun14-13 08:46 PM
LayMuon
0 582
Hi Everyone. In the Resonaances blog, I recall that it was mentioned there that the particle physics group at CERN...
Jun14-13 08:44 AM
mfb
2 796
I can't seem to find one, but does anyone have a reference to the fourvector polarizations for a massive vector...
Jun13-13 12:43 PM
Hepth
0 596
Greetings to all I had some problems using MCNP5 for gamma shielding calculation. The original input file is from a...
Jun12-13 09:31 AM
damyoro
13 2,430
I know the trace tr in 4-dimensional space-time, how is the result of it in D dimension? Is it the same as in 4...
Jun12-13 08:32 AM
andrien
1 773
In case I'm wrong, the formula for energy of a photon is E=hf. Or E=hc/λ, because f=c/λ. Basically the second...
Jun12-13 07:41 AM
Aspchizo
3 1,570
I am studying QFT from Srednicki's book. Let me ask a question about symmetry factor from this book. Let, for...
Jun12-13 12:27 AM
omephy
0 697
I am learning QFT from Srednicki's book. However, in Figure 9.2 Srednicki has given all connected diagrams with E=0...
Jun11-13 04:38 PM
Bill_K
3 728
The Z0 is a linear combination of W0 and B0 bosons, so unlike the charged current interaction it can interact with...
Jun10-13 01:07 PM
bayners123
2 622
Hi all, If I take an action involving two point particles coupled together by a delta function contact interaction...
Jun8-13 03:09 PM
Illuminatum
2 780
I am no expert on this stuff, so please forgive any errors. I've read some Feynman and seen his diagrams showing a...
Jun7-13 03:29 AM
mpv_plate
7 1,113
Greeting people of Physics, Why are the laws of physics not symmetrical between left and right, future and past,...
Jun7-13 01:55 AM
AlfieD
13 1,346
Quick, probably obvious, question. If there was equal amounts of matter and antimatter and they collided and exploded,...
Jun5-13 03:32 PM
mfb
3 663
Could anybody explain why neutrinos have only ever been observed to be left-handed and antineutrinos right-handed? If...
Jun5-13 07:27 AM
Bill_K
7 905
(PS: this post was also posted at the quantum mechanics/field theory forum, but I did not get any replies there) ...
Jun5-13 03:30 AM
andrien
2 763
why without the higgs boson, would partical physics be nonsense. why does this particle have such an important impact...
Jun4-13 09:25 AM
llynne
6 1,325
I've been thinking about dark matter, WIMPs and neutrinos, and why these particles would not interact with matter...
Jun4-13 08:45 AM
llynne
5 1,229
Does anyone have any good technical papers covering the Majorana particle? ...
Jun3-13 04:48 PM
Mordred
2 600
Does anyone have a reference for the details of energy and by-products produced in an annihilation reaction of a...
Jun2-13 09:20 AM
mfb
1 763
Hello, I am opening this thread so as to discuss if possible what you believe is the science case of building a...
Jun1-13 07:29 PM
e.chaniotakis
7 763
Hi, I have always wondered, is there a known formula that predicts the half life of an atom based on known values...
May31-13 01:33 PM
Bill_K
2 703
Dear Physics Forum, I was thinking about the properties of the combined electroweak force. Does it maintain the ...
May31-13 03:43 AM
mpv_plate
2 711
I've PMd some of you with this question, but I got some conflicting replies or no replies at all lol, so I'm posting...
May30-13 02:31 PM
The_Duck
4 835
Has the experiment been done to drop anti-matter and see if it falls the same speed as regular matter? I seem to have...
May29-13 01:39 PM
DrClaude
2 784
I have been interested in how they can be made in large amounts. If you could post the energy and projectile particle...
May28-13 02:49 PM
mfb
1 714
\pi^0s decay to two photons via the EM interaction. The J^{PC} of the pion is 0^{-+} and of a \gamma is 1^{--}. ...
May28-13 06:19 AM
bayners123
7 848

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