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

Jul1814 12:32 PM
ChrisVer

187 
61,688 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:41 AM
ZapperZ

1 
25,743 
can anyone explain me about the differences between color and strong force?Though there are four fundamental forces so...

Dec213 03:30 AM
Drakkith

4 
863 
Hi everyone, I am doing a final project on the title " fundamentals of neutrino physics". I wanted to raise some...

Dec113 04:36 PM
RGevo

4 
697 
Can the classical electromagnetic force between two arbitrarily moving electrons, described by the LienardWiechert EM...

Dec113 03:38 PM
meopemuk

1 
719 
I'm currently doing some research at the moment for my professor, and he gave me a list of things to look at. Before...

Dec113 01:11 AM
Simon Bridge

3 
589 
I was given a sample, that it is suppossed to be a medium thickness Rhodium on top of an infinite silicon waffer. The...

Nov3013 05:07 PM
atha

2 
577 
Hello,
Empirically, the flux distribution of cosmic ray muons follow cos^2(θ) where θ is angle of incidence....

Nov3013 02:24 PM
phys_student1

4 
859 
Hi, I'm studying about Renormalization group.
I have a question about mass betafunction.
Usually, when we...

Nov3013 06:56 AM
andrien

9 
1,206 
As a physics student, I understand that α particles are emitted and are the same as helium atoms without electrons.
...

Nov2913 09:05 AM
Astronuc

13 
1,503 
Hi everybody,
i'm worried about some calculation. I have to write down the amplitude for the neutral Kaon...

Nov2913 05:51 AM
jkp

7 
3,643 
Dear Physics Forum,
As I understand it, the Higgs field is a quantum field that stretches throughout our universe....

Nov2813 10:42 AM
Mandragonia

48 
15,205 
Co60 is produced from Co50 through neutron activation. Neutron flux 10^18 nuetrons/(s*m^2). cross section is 20...

Nov2713 06:12 PM
mfb

3 
663 
I've been trying to get a grasp of what they ideal of antimatter is exactly. I do understand that it's the 'opposite'...

Nov2713 06:02 PM
Bill_K

6 
789 
In my class notes, the muon decay width is:
\Gamma_\mu=\frac{G^2_F m^5_\mu}{192\pi^3}
Yet, in Wikipedia (take...

Nov2613 05:51 AM
RGevo

5 
858 
I am not really sure whether this topic belongs here or not, but since my example will be a certain one I will proceed...

Nov2513 09:50 PM
George Jones

4 
812 
Hi, aside from nucleons is there any other stable (metastable doesn't count in this question) hadronic matter that...

Nov2513 09:03 AM
mfb

9 
765 
Hi all,
Let me ask about what is meant that
Narrow width approximation has an error ~ ## \Gamma/m ##, is it mean...

Nov2513 08:04 AM
Safinaz

0 
587 
Hi All,
I'm working through the theory of the strong interaction and I roughly follow it. However I have some...

Nov2513 06:54 AM
bapowell

1 
668 
Hello. I read about fast neutron therapy for cancer and the therapy uses a beam of high energy neutrons. How do you...

Nov2413 01:52 PM
anorred

2 
666 
Hi all,
why in SUSY we tend to use 2 components Weyl spinor field
not the ordinary Dirac filed ..
Regards,...

Nov2413 11:47 AM
dauto

3 
695 
Hello,
I am a layman who just read Sean Carroll's The Particle at the End of the Universe and I am trying to...

Nov2413 08:06 AM
mfb

7 
958 
As I mentioned, I want to know if the cahrge distribution of nuclei has any influence on electronic properties. And...

Nov2313 12:37 PM
snorkack

2 
708 
For the electron, wiki lists its magnetic moment as −1.00115965218076(27) μB. It does not list it for the Muon or...

Nov2313 02:35 AM
lpetrich

6 
1,081 
http://arxivweb3.library.cornell.edu/abs/1311.5238
"Evidence for HighEnergy Extraterrestrial Neutrinos at the...

Nov2213 08:53 PM
fzero

1 
665 
Hi everyone,
my question seems pretty simple, but I couldn't find any answers. OK, so the neutrino flavour...

Nov2213 06:08 PM
BruceW

9 
836 
Hi all,
I try to understand the difference which can made by using or not using NWA ..
I have a process have...

Nov2213 02:09 PM
Safinaz

2 
647 
I read recently, that by separating two quarks, once a high enough energy has been introduced, new quark pairs will...

Nov2213 01:22 PM
mfb

11 
1,102 
The binding energy (BE) per nucleon for 235U is 7.6 Mev. The 235U undergoes a nuclear fission to produce two fragments...

Nov2113 07:48 AM
mfb

7 
1,065 
I'm curious to know what tends to be 'left over' after particle collisions at sites like LHC. I realize that many...

Nov2013 03:34 PM
mfb

5 
804 
Where would you use our new radiation detector?
We are a student team from the Vienna University of Economics and...

Nov2013 03:18 PM
mfb

5 
1,047 
I would like to ask you 2 completely separate questions... Since both concern the W,Zs I don't want to create more...

Nov2013 09:50 AM
dauto

14 
1,302 
Hello to everybody,
I need some explanation on how to use SDEF variables to define correctly a planar rectangular...

Nov2013 05:51 AM
damyoro

0 
685 
Can anyone give or point me to a list of ALL continuous symmetries in the standard model, and the conserved currents...

Nov1813 09:39 PM
ChrisVer

3 
916 
Hi all,
Do any one know what is the spin correlation and what its relation to theNarrow Width Approximation.
...

Nov1713 04:11 PM
RGevo

1 
803 
I know that, given scalar A_{i} fields, the normal order is defined as :A_{1}...A_{n}: = \sum \prod A^{}_{i}\prod...

Nov1613 08:35 AM
Catria

0 
690 
Recently, I read a review on magnetic monopole published in late 1970s, wherein some conjectures of properties...

Nov1613 03:30 AM
Simon Bridge

1 
757 
The problem is showing
(□+m^2)<0 T(∅(x)∅(y)) 0> = δ^4 (xy)
I know that it is relavent to Green's function,...

Nov1213 09:34 AM
ehms

2 
1,613 
Hello everyone, I have been wondering about the quantization of Maxwell's equation in free space, but now suppose that...

Nov1213 08:08 AM
NeroKid

6 
1,170 
Hello everyone,
I have read about the theoretical values of the Z boson decay partial width and how well they...

Nov1113 01:06 PM
Vanadium 50

6 
1,139 
I am studying QFT and got stuck on one question which may be simple. Why is structure constants (in Lie algebra) real...

Nov1113 10:05 AM
George Jones

3 
1,211 
I confront an integration with the following form:
\int d^2{\vec q} \exp(a \vec{q}^{2})...

Nov1013 07:55 PM
phypar

2 
1,023 