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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 52,686
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 24,320
Imagine that two electrons interact by exchanging a virtual photon. Electron A gains momentum ##-\vec{p}## and...
Nov5-13 07:43 AM
johne1618
2 860
Hi. I am confused about something related to the creation of particles/antiparticles in a complex scalar field. I...
Nov4-13 05:52 PM
spookyfish
2 872
The first question is why it is sometimes called the "Higgs meson"?-even by its discoverers, see recent controversy...
Nov4-13 08:12 AM
Bill_K
10 1,384
Veltman states that the cosmological constant in the Higgs model takes the form C= m2M2 / 8g2 , which is way too...
Nov3-13 04:22 PM
my2cts
26 2,715
Hi all, I'm trying to calculate the Boltzmann factor for a fusion reaction, however I can't find the activation...
Nov3-13 04:02 PM
frazzle96
0 817
Hi, I'm doing some coursework on nuclear fusion, and am trying to calculate the energy released by fusing a tritium...
Nov3-13 10:21 AM
frazzle96
2 892
As far as I can tell Tevatron was able to identify relative to background an excess in decay processes in the range...
Nov1-13 10:29 PM
mfb
3 999
Electron is a charge, what means concrete configuration of electric field, growing to infinity in the center (if it...
Nov1-13 02:28 PM
jtbell
23 2,266
The detection of spin in Hadrons and Leptons is done through magnetism, a spin 1/2 particle has two states in a...
Oct30-13 03:50 PM
mfb
7 1,095
Has anybody thought of it before? I mean even if it were energetically expensive to harness it it might actually...
Oct30-13 02:52 PM
fusion2022
38 3,811
Do protons and neutrons have excited states? This page shows some simulated shapes of protons....
Oct30-13 10:30 AM
ZapperZ
5 971
Good afternoon fellow scientists,i have a small problem in evaluating the propagator for the complex Klein-Gordon...
Oct30-13 08:40 AM
Ace10
6 1,065
Hi people, I have one question, leptons and quarks are electromagnetically charged particles. Is there an...
Oct30-13 03:46 AM
Hluf
8 960
Qhy does SO(n) have the same number of dimensions of O(n), whereas SU(n) reduces the dimensions of U(n)? Isn't the...
Oct29-13 08:55 AM
DarMM
3 783
Hi Folks -- can anyone direct me to a table online which lists the wavefunctions for the hadrons in terms of their...
Oct28-13 01:18 PM
metroplex021
4 754
Really quick question. In a graph like this: http://en.wikipedia.org/wiki/File:Cs137_Spectrum.PNG Source ...
Oct27-13 07:40 PM
mfb
6 1,009
The quark content of the neutral pion is listed as \frac{u\overline{u}-d\overline{d}}{\sqrt{2}} What is the proper way...
Oct27-13 05:03 PM
UltrafastPED
4 925
Hello everyone, I have a question about virtual corrections of an external fermion line. According to the LSZ...
Oct27-13 05:47 AM
andrien
2 1,065
Hi all, Can anyone tell me whether the counterterms introduced in renormalized perturbation theory (see e.g....
Oct26-13 08:03 PM
Avodyne
7 1,287
Hi, I read about Noether's theorem, which states that if, under a continuous transformation, the Lagrangian is...
Oct26-13 03:30 PM
vanhees71
1 1,178
This is probably a minor point, but I have seen in some QFT texts the Euler-Lagrange equation for a scalar field, ...
Oct25-13 10:46 AM
fzero
4 930
Peter Higgs is going to get a Nobel prize for physics, since Higgs boson's existence was confirmed in the experiments...
Oct24-13 06:30 PM
mfb
9 1,073
The charts at CERN show calculations that a 126 GeV Higgs boson is expected to decay to a bottom/anti-bottom quark...
Oct23-13 05:24 PM
Bill_K
2 881
The University of Edinburgh is offering a massive online open course on "The Discovery of the Higgs Boson" to the...
Oct23-13 08:20 AM
ZapperZ
0 819
With the recent experimental evidence that the Higgs boson likely does exist, and that the Higgs field may well be...
Oct22-13 01:33 AM
king vitamin
17 8,835
What is the Higgs boson's mechanism for giving mass?
Oct21-13 07:18 PM
Superposed_Cat
29 10,038
My question concerns the delta++ baryon. I understand that the rest mass of quarks makes up a very small percentage...
Oct21-13 12:17 PM
lpetrich
6 1,001
Whenever people begin to explain the nuclear strong force, they relate it to electricity. I was wondering if color...
Oct20-13 09:04 PM
clem
11 1,059
U = Th + alpha rays 92p 90p 146n 144n I have heard that if...
Oct20-13 03:25 PM
snorkack
11 5,901
Hi all, I'd like to more understand what is the difference between when we draw the differential cross section ...
Oct20-13 04:24 AM
Safinaz
0 729
I have been looking at the Beta decay process and can't see how energy is conserved. The W boson, for example, is many...
Oct20-13 03:39 AM
Dadface
8 982
If the Higgs is around 126 GeV, why was the LHC required to find it, when the Tevatron is capable of 1 TeV collisions...
Oct19-13 07:27 PM
mfb
3 784
As the title says- what is it that makes all mesons unstable? I know some quarks are less stable than others...
Oct18-13 02:13 PM
dauto
10 3,924
Hi everyone, I'm an engineer and not a physicist, so forgive me if something sounds stupid. Question: Is it...
Oct18-13 12:21 PM
mfb
3 814
When we derive the Bethe-Salpeter equation, we have the relations of mass of constitute m, transverse momentum, q-hat...
Oct18-13 02:10 AM
Hluf
0 733
Under the Higgs in wiki it says "Another possibility is for the Higgs to split into a pair of massive gauge bosons....
Oct16-13 05:29 PM
mfb
4 1,665
I understand (I may be wrong) that the highest density material is that of a quark-gluon plasma, such as the interior...
Oct16-13 02:47 PM
dauto
16 28,788
Assumptions 1) a=absorption 2) f=fission 3) ∅=neutron flux 4) time independent 5) group 1, fast neutrons 6)...
Oct14-13 12:10 PM
sandon
3 836
In almost every QFT or particle textbook we learn that complex scalar fields or spinor fields (or even multiplets of...
Oct14-13 12:09 PM
Lapidus
7 2,756
Nonlinearlity of QFT produces interactions, or so I was told today. Maxwell's eqns, though, are perfectly linear. Does...
Oct14-13 06:02 AM
DarMM
6 2,349

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