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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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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 34,674
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 21,119
Hello everybody, I have to calculate the matrix element of the process gg-->ttbar-->lnub lnub (ttbar dileptonic...
May15-07 08:31 AM
pierrechevalier
0 4,244
It is well know that massless spin-1 gauge bosons have two spin states s=+1 and s=-1. There are two independent...
May18-11 05:01 PM
tom.stoer
29 4,237
As far as I know the usual extension of the standard model to include a massive neutrino implies a violation of the...
May17-06 08:38 AM
hellfire
2 4,236
What is the estimate of the gravitron size and can someone explain why it must be spin 2 also what is the higgs...
Feb22-07 11:59 AM
Mentz114
26 4,232
Hello, if someone could enlighten me I'd be most grateful. Also, if anybody could point me in the direction of...
Mar1-11 05:25 AM
mmaa
22 4,231
I saw a video where a professor said "So you do it by ... using e=mc^{2} ... you collide some protons at huge...
Jul2-12 10:21 AM
mfb
32 4,220
With the recent announcement at Cern there have been many video clips published describing the Higgs field. They show...
Aug12-12 07:11 AM
Vanadium 50
39 4,220
I have the following contour integral form of Wick's theorem (C indicating contraction): C=\frac{1}{2 \pi i} \int...
May31-09 07:03 PM
Super_Leunam
1 4,219
What I'm looking to understand is why fission and or fusion result in the release of energy. I understand that: ...
Nov9-09 05:05 PM
Frame Dragger
6 4,207
While studying particle physics, i saw that the range formula is the integration dE/(dE/dx) but as you know that there...
Dec26-09 12:51 PM
Bob S
2 4,207
Basic question, but nevertheless. In a non-Abelian gauge theory, the fermions transform in the fundamental...
Nov6-10 06:47 PM
tom.stoer
5 4,192
There are bundles and bundles of information about particles to be found on the web and on this forum as well (many...
Sep4-05 04:55 AM
marlon
28 4,171
what is the differece between internal conversion electrons, electron capture and auger electons? i dont understand....
Dec26-11 07:42 AM
Astronuc
1 4,171
Can we calculate the difference in mass between a Proton and Neutron? If so, how?
Nov16-10 08:06 PM
Passionflower
24 4,167
So I've been playing around with different electroweak lagrangians (sourceless, higgsless, unbroken, broken, etc), and...
Sep30-10 03:46 PM
michael879
30 4,158
Hi, I have been looking at the baryon decuplet for spin 3/2 baryons, and the octet for spin 1/2 baryons. Here is a...
Jan28-10 02:56 PM
Vanadium 50
4 4,157
Hi! I'm struggling with this question: A neutrino of energy 10 GeV collides with a proton at rest producing a 9 GeV...
Oct28-07 09:01 AM
genloz
0 4,151
As we know, there is a conjectured/theorized "island of stability" for the extended Periodic Table, whereby a select...
Oct9-07 02:29 PM
mathman
3 4,150
Hello, how do the angular distributions of Bhabha Scattering e^+ e^- \Rightarrow e^+ e^- and Muon pair...
Feb7-09 12:28 PM
Sideways
1 4,150
If anyone can help me with this question I'd be greatly appreciative.... Here's what I think I understand: Nuclear...
Jul13-08 11:25 PM
pfalk
3 4,145
Hello all, i am having a few problems simulating cosmic rays with a silicon CCD detector, mainly because...
Feb25-10 09:37 PM
RichardOsmond
4 4,137
Is this reaction possible , i mean bombarding a 1H target with an electron to form a neutron that's all what i...
Jan28-09 09:39 AM
malawi_glenn
7 4,127
In order to use the path integral formulation for the derivation of the Feynman propagator, we need to introduce a...
Jun10-05 09:49 AM
dextercioby
15 4,113
Internal symmetries of the SM -U(1), SU(2), SU(3)- are usually said to belong to abstract spaces unrelated to...
Jul25-12 03:31 PM
tom.stoer
54 4,113
In the standard model, there are three families of matter particles, headed up by the electron, tau and muon, and...
Feb18-11 09:41 AM
GString
31 4,109
See: http://user.web.cern.ch/user/QuickLinks/Announcements/2007/LHCInnerTriplet.html What's the latest news on the...
Jun22-07 03:55 AM
ahrkron
19 4,107
Hi all, I've decided to read up on particle physics in my spare time for my own edification, but I've had some...
Dec5-03 04:13 PM
mormonator_rm
4 4,096
1) If an electron/positron pair can be produced by a gamma ray with kT=or>1MeV striking a nucleus, can heavier...
Apr4-06 05:10 PM
pallidin
21 4,092
I keep on hearing that there are hundreds of hadrons, or even more ambiguous a zoo of hadrons, but for some reason...
Jan25-11 11:12 PM
Max
17 4,092
Hi I am searching for the equation for the radiation probability of a gluon from a quark. I need this for an...
Jun9-08 10:43 PM
humanino
10 4,089
Hello, I'm fairly new with the nuclear physics, but I'm willing to study and learn as much as possible. I've...
Feb4-09 04:31 PM
malawi_glenn
8 4,087
I have a question about the neutral Pi-meson. One of the decay modes of the neutral pi-meson is to 2 photons. ...
Mar28-05 06:08 AM
dextercioby
10 4,078
I'm considering the beta decay of a neutron into a proton an electron and an antineutrino. I heard that this was...
Dec18-05 03:25 PM
mathman
1 4,076
hello, new & amazed by all the knowledge and passion on these forums..wow! well no questions are stupid i hope. I've...
Feb29-08 10:00 AM
malawi_glenn
4 4,073
Hello! Sorry to bother you with all these questions coming to my mind in preparing for my oral exam in QCD. I was...
Nov8-08 04:42 AM
blue2script
0 4,066
What does it mean to have a model that is SU(2)xU(1)? Does it have anything to do with the electro-weak unification? I...
Dec9-07 11:32 AM
Magister
6 4,059
Hello, This sounds like a silly idea, but I am trying to simulate all forces of in the universe on my computer,...
Sep3-04 08:16 PM
ComputerPsi
8 4,053
Element 117 has been synthesized: http://www.nytimes.com/2010/04/07/science/07element.html If the Island of...
Apr12-10 09:57 AM
typical guy
17 4,044
What is a Higgs Particle?
Jun23-08 03:01 PM
blechman
20 4,043
Peter Woit provides this link to a talk at CERN...
Dec20-08 02:27 AM
stevebd1
8 4,040

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