God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...

Jul1112 01:13 AM
tom.stoer

178 
34,714 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:41 AM
ZapperZ

1 
21,131 
hello
I would like to know the frequency width of a decaying axion
Lets say the axion has a mass of 10^6 eV and it...

Jul1409 03:00 PM
hamster143

1 
1,477 
Hi, im a newcomer, and i have a question about an integral shown as follows,
\int d^{3}p_{2} \frac{1}{2E_{2}}...

Jul1709 03:28 AM
CompuChip

1 
790 
In air, high angle scattering of alpha radiation from Am241 is almost
non existent. When a sample is pulled away from...

Jul2109 09:45 PM
Bob S

1 
1,407 
What is the difference between renormalized mass and the running mass? And physical mass,pole mass?

Jul3009 05:35 PM
blechman

1 
1,994 
Susy has been offered as a way to stabilize the Higgs sector from radiative corrections, on the argument that w/o SUSY...

Jul3009 12:20 AM
Parlyne

1 
863 
the idea is let us supppose we have a well behaved theory where only logarithmic divergences of the form
...

Aug1509 11:31 AM
genneth

1 
759 
I'm trying to understand the energy spectrum of neutrinos ejected from the sun. Any suggestions on a book that covers...

Aug1209 01:11 AM
Vanadium 50

1 
1,325 
I understand that when , say, several protons and neutron come together to from a nucleus they loose some mass and...

Aug1709 05:15 AM
fatra2

1 
1,097 
When I look at a nuclear level scheme, there are many gamma ray transitions from energy levels of say, spin 4 to spin...

Aug1909 02:59 PM
Vanadium 50

1 
1,039 
I have worked out the total spin for the elements up to Neon however I hit a snag with Nitrogen and Fluorine.
The...

Sep409 09:59 PM
PeterDonis

1 
898 
I have a question about the nature of matter on earth, the most stable form of hadrons which exist on earth are made...

Sep109 12:43 AM
Vanadium 50

1 
904 
When writing a reactivity in dollars, what is the proper notation?
Would it be 0.43$ or $0.43? or is it just 0.43?...

Sep1009 03:20 PM
Astronuc

1 
2,988 
I have been learning particle physics lately but it's been mostly from a theoretical perspective and not a...

Sep1109 07:01 AM
Astronuc

1 
8,698 
If an nuclide can be fissioned by thermal neutrons does that always mean it can be fissioned by fast neutrons. If not...

Sep1309 05:14 PM
Astronuc

1 
3,720 
How is fusion initiated with a laser? What are the difficulties that are preventing physicists from using it?

Sep1409 10:11 AM
Bob S

1 
913 
Is anyone here familiar (more or less) with the new type of telescope called IACT, Imaging Air Cherenkov Telescope.
...

Sep1609 12:59 AM
Vanadium 50

1 
732 
I can't find the value of the Yukawa coupling g, for neutronproton scattering for example, where the Yukawa potential...

Sep2009 05:47 PM
clem

1 
2,617 
Quark physics is completely out of my depths but I was wondering if, in a nucleon, they assume certain orbitals like...

Sep2109 08:31 AM
clem

1 
883 
When it is said that the relative strength of weak interaction is \ 10^{5},what does this mean?
On calculation I...

Sep2209 04:36 PM
hamster143

1 
3,625 
Hi everyone! Can somebody briefly explain me what the GIM Mechanism (Glashow, Iliopoulos, and Maiani) is and why does...

Sep2409 10:57 AM
humanino

1 
4,282 
The Higgs particle is said to be required for mass.
Does this mass in this case mean inertia?
Surely all that is...

Sep2609 06:51 AM
krishna mohan

1 
1,175 
Where does most of the heat energy in fission reactions come from?
Does it come from radiation emitted from...

Sep2809 10:18 AM
QuantumPion

1 
1,062 
Hi
I have a question about Lorentz invariant measures,
consider an integral of the form:
\int d\mu(p)...

Nov1209 04:19 PM
hamster143

1 
2,733 
Is there a defined distance at which Electromagnetism starts exerting more force than the strong nuclear force?
So...

Oct609 11:40 AM
Meir Achuz

1 
971 
I'm trying to calculate the paulilubanski pseudo vector for different representations
of the poincare group. The...

Oct609 08:11 PM
Wriju

1 
2,228 
Hi,
I am trying to understand relations between Homology/CoHomology and Homotopy group..I am familiar with Hurewicz...

Oct709 11:04 PM
Haelfix

1 
1,096 
what is the difference between a beta particle and an electron in terms of its behaviour and pysical properties like...

Oct909 10:26 AM
Bob_for_short

1 
912 
Hi, I am having much trouble on this particular question. Here it is:
Four “point” gamma ray sources are...

Oct1009 01:00 PM
Astronuc

1 
2,854 
An American physicist is investigating the possibilities of the development of a hyperdrive at the LHC. If you're not...

Oct1109 10:28 PM
vanesch

1 
792 
In what relation to each other are the direction of spin vector and direction of polarisation vector.... for example...

Oct1309 05:45 AM
Vanadium 50

1 
1,661 
If there are three vectors a=(1,0,0) and b=(0,1,0) what vector will be a+ib (i  is a complex)
Is it possible to...

Oct1209 04:16 PM
Phiphy

1 
954 
Anybody knows what is the physical meaning of hypercharge in electroweak theory?

Oct1409 03:07 PM
Ben Niehoff

1 
1,023 
Where can I get reliable information on the cross section of various substances: boric acid, O2, Uranium, water, etc?

Oct1609 10:22 PM
Bob S

1 
1,228 
I have a theoretical question.
When doing canonical quantization, and writing the equation for he time evolution of...

Oct2309 06:23 AM
Bob_for_short

1 
807 
I've been wondering ever since I read about mesons, how they can exist. Shouldn't the particle antiparticle pair...

Oct2409 09:25 AM
Vanadium 50

1 
2,600 
Hello guys,
I have a large amount of data... and I was wondering if there is a Time Of Flight (TOF) calculator out...

Oct2709 12:08 PM
Bob S

1 
3,873 
What is an isoscalar nucleus?
I guess it should be a nucleus with isospin T=0.
In the place where I...

Oct2709 07:44 AM
Vanadium 50

1 
2,595 
Hi, did I understand this correct: The Yukawa matrices are the couplings of the particles to the Higgs filed. They are...

Nov2209 06:47 AM
ansgar

1 
2,196 
Here are two pages showing examples of the Cherenkov radiation:
http://physics.syr.edu/hep/rich.html...

Nov1509 11:38 AM
Vanadium 50

1 
1,458 
Can anyone walk me through this calculation? I'm not completely sure how to do it (merely a student).
So is this...

Nov2209 04:48 AM
Vanadium 50

1 
735 