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 
34,625 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:41 AM
ZapperZ

1 
21,093 
I have the following contour integral form of Wick's theorem (C indicating contraction):
C=\frac{1}{2 \pi i} \int...

May3109 07:03 PM
Super_Leunam

1 
4,217 
Hello,
how do the angular distributions of Bhabha Scattering
e^+ e^ \Rightarrow e^+ e^
and Muon pair...

Feb709 12:28 PM
Sideways

1 
4,149 
Can some kind person please explain why He4 is so high and Li6 is so low on the graph of binding energy per nucleon....

Feb609 04:23 PM
malawi_glenn

1 
2,341 
The Gpartiy of the pion is 1, which is rotation in isospin space around yaxis by angle \pi followed by...

Feb1909 07:37 AM
malawi_glenn

1 
1,670 
Im trying to make a partical excelerator for school using  ions but i cant find any b prints or any one who can help...

Mar209 01:26 PM
Bob S

1 
1,871 
Hi, can someone please help me?
how do you calculate the binding enery of D2 in MeV? and binding energy per...

Feb2609 09:18 AM
malawi_glenn

1 
1,454 
I have heard many people use the term power counting before but I cant find any explanation of what it means. All I...

Mar209 05:36 PM
distanceless

1 
4,454 
When I studied renormalisation for the Ising model the procedure was to sum over every second spin and then find a new...

Mar509 04:53 AM
genneth

1 
1,020 
I have been going through some papers on lattice QCD lately, and many of them mention "topological charge". I was...

Mar609 10:12 PM
humanino

1 
5,117 
i cant seem to find any straightforward descriptions of it for why+when its needed. Plus im really confused as to how...

Mar709 05:29 AM
malawi_glenn

1 
1,203 
Hello all,
lets think we have a segmented gammaray detector. when a gammaray interacts several segment of the...

Mar1209 02:50 PM
Bob S

1 
1,323 
Hi, I've been measuring the flux of cosmic ray muons as a function of zenith angles. I have calculated the flux but do...

Mar1709 05:02 AM
Vanadium 50

1 
1,387 
Hello!
I was wondering if someone could help me with a problem of units!
I'm currently deriving probability...

Mar1609 09:33 AM
clem

1 
1,874 
Hello,
I looked around before and could not find an answer to this question.
So given the reaction
neutron +...

Mar1709 09:46 PM
hamster143

1 
3,787 
I have never really understood the approximate 'Custodial symmetry' in the Standard Model. I've seen it being...

Mar2209 12:25 PM
blechman

1 
3,490 
So i was sitting here thinking about plasma. I started to wonder, if we create some plasma, lets assume we have it...

Mar2309 02:18 PM
alexgmcm

1 
944 
Hello,
As I have learned Carbon, uranium & other elements of radioactive nature are now used for dating how old an...

Mar2409 03:00 PM
alxm

1 
1,547 
I have completed an experiment to measure the decay rate of an isotope, and I am trying to estimate uncertainties. ...

Apr609 12:11 PM
Bob S

1 
1,788 
To prove:
F \overline{} \mu\nu = \nabla \overline{} \muA \overline{} \nu  \nabla \overline{} \nuA \overline{} \mu...

Apr1609 08:08 AM
xepma

1 
1,333 
I need blibiography of analysis of the spectrum
I read in B. Green pp 113, but I no understand.

Apr2009 01:41 AM
malawi_glenn

1 
1,328 
I want deduc vertex of the lagrangian, but I not know how?

May1009 05:16 AM
kuon

1 
1,476 
I want know if have a procedure aesy of deduced the kinematic factor. I know the procedure of M.B. Green pp 420, but...

Apr2409 12:12 AM
malawi_glenn

1 
1,070 
(1)How does the nuclear reaction in a power plant differ, from the the one that occurs in a nuclear bomb?
(2)I...

Apr2709 01:15 AM
malawi_glenn

1 
1,356 
I have been invited to write a proposal for researching this:
>> The basic idea is to calculate, in first...

May209 12:42 AM
malawi_glenn

1 
1,291 
I need help understanding the Higgs mechanism: what is the Higgs condensate, what is the Higgs boson, why do only the...

May509 01:21 AM
malawi_glenn

1 
2,185 
Question in title. Indeed, how are any particle masses determined? And especially quarks, since they have the added...

May1009 02:21 AM
genneth

1 
1,285 
hi,
I am a PhD student and I'm looking for a course or resources on the hadronic jets and the models used to deal...

May1309 03:10 PM
blechman

1 
1,280 
The nuclear shell model is based on the shell model for electrons, and in the electron shell model, lasing is possible...

May2309 07:04 AM
Bob_for_short

1 
1,128 
Suppose an antimatter at lower energy(K.E) collides with a matter in higher energy then what will be the output.

Jun1209 01:45 PM
malawi_glenn

1 
927 
Can antimatter(positron) can be converted into a matter(electron) . If yes what other particles are created in that...

Jun1209 03:54 PM
Bob S

1 
843 
Hi all,
is anybody familiar with (QED for simplicity) radiative corrections for absolute cross section measurements...

Jun2609 07:18 AM
Bob_for_short

1 
1,061 
Im trying to find the number of delta rays though a material and am having some trouble with the units, can anyone...

Jun2509 07:17 PM
Bob S

1 
1,039 
How do protons and neutrons behave in nucleus? Is they just sit where? Or move some how?
or maybe jei form some form...

Jun2909 05:01 AM
malawi_glenn

1 
723 
I'm working on a research project involving calculations about various aspects of electron storage rings and have come...

Jun2909 08:46 PM
Bob S

1 
1,165 
If I look up how the mass of the electron runs with energy between low energy and the Planck energy due to...

Jul609 05:38 AM
malawi_glenn

1 
995 
consider deep inelastic scattering of ep.assuming that a graviton acts as a propogater in this interaction how would...

Jul709 07:17 AM
humanino

1 
909 
I know that there are many reasons why SU(2) can't be the electroweak gauge group, but I want to have some...

Jul909 01:05 PM
Avodyne

1 
1,673 
How can I explain this assymetry? I mark this assymetry with bold in the graph. This graph is depending potential...

Jul1109 08:59 AM
malawi_glenn

1 
2,080 
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 
1,476 
i have attached two pages from a research paper.can someone interpret the mathematics in them or provide link that...

Jul1309 06:42 AM
malawi_glenn

1 
817 