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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 21,109
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 34,660
Hello. When you have a plot of the cross section in function of the centre of mass energy of an e+e- -> hadrons...
Jul8-13 06:20 PM
mfb
5 1,027
Why is it necessary to use Monte Carlo methods in high energy physics? There is Feynman calculus to evaluate matrix...
Jul7-13 03:43 PM
RGevo
2 799
I had a look at the production cross sections for W/Z at hadron colliders. These differ as a function of energy with...
Jul5-13 12:06 PM
Vanadium 50
2 821
Hello everybody! :wink: I have some difficulties concerning the concept of nuclear binding energy. First, look at...
Jul5-13 05:46 AM
Bill_K
6 1,253
Hello, everybody: I have (what I think is) a silly question. We all know that μ and τ particles are just as...
Jul4-13 10:25 AM
MManuel Abad
3 810
i've been researching photons and i discovered on http://http://van.physics.uiuc.edu/qa/listing.php?id=414 and ...
Jul3-13 07:51 AM
ZapperZ
42 17,170
The Fitch and Cronin experiment is put forward as one of the very few examples of CP violation in weak interactions...
Jul2-13 11:22 AM
Bill_K
1 789
I have a question. From this government reference: http://www.ncnr.nist.gov/resources/n-lengths/ the...
Jul1-13 10:14 AM
Salman2
9 1,310
Can anyone help me with an approximate answer to this or point me in the direction of avenues to get an answer to...
Jun28-13 12:05 PM
Vanadium 50
17 1,667
So I'm intending to teach myself some Particle Physics and Standard Model type stuff, I was wondering if someone who's...
Jun27-13 03:04 PM
dkotschessaa
1 913
Hi all. I have a question. What is the behaviour of the polarization vector of a pseudoscalar particle under a parity...
Jun27-13 01:47 AM
Einj
8 871
Does anybody understand this theory? Would this be the way of implementing it? Step 1.) Use DimReg to set the...
Jun26-13 11:19 PM
Jim Kata
0 683
I am reading Mohapatra's book: "Massive Neutrinos in Physics and Astrophysics". At the beginning of chapter 7, it is...
Jun26-13 02:21 PM
lalo_u
4 870
Hi, I have a question regarding the possibilities of analyzing the activity of Ra-226 in a sample from a collected...
Jun25-13 12:33 PM
mfb
3 1,069
I'm trying to understand the process that destroys particles very shortly after they "appear". I have read that they...
Jun22-13 02:44 PM
mfb
12 1,462
Hello everybody, I am a first year physics student and I have a question about neutrinos and antineutrinos. In a...
Jun21-13 04:47 PM
IsometricPion
3 870
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 1,246
Does anyone know of a site that lists particle half life times, all in one place?
Jun21-13 12:36 AM
Haborix
1 716
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
2 820
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
7 892
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
1 773
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 1,165
can anybody help me to derive eqn. (9.19) of Srednicki's QFT book?
Jun18-13 06:40 PM
Haborix
3 774
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 1,136
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
2 822
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
0 606
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
5 893
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
10 946
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 1,019
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
0 626
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
0 590
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
2 801
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
0 606
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 2,459
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
1 786
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 1,608
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
0 710
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
3 740
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
2 631
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
2 788

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