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 
34,674 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:41 AM
ZapperZ

1 
21,119 
Considering the Atlas experiment, which are the basic theoretical decisions someone must take in order to create an...

Apr1509 02:54 PM
Vanadium 50

6 
2,192 
Could someone please explain what a multiplet is? I know that this has to do with the representation theory of Lie...

Apr1509 06:02 PM
humanino

3 
2,376 
To prove:
F \overline{} \mu\nu = \nabla \overline{} \muA \overline{} \nu  \nabla \overline{} \nuA \overline{} \mu...

Apr1609 08:08 AM
xepma

1 
1,333 
with this technique that has been used to detect quarks, are the results reproducable every time? or are there...

Apr1609 11:29 AM
Bob S

5 
1,306 
Is there a meaning to spin of particles if it was a (1+2)D rather than (1+3)D ?

Apr1609 04:19 PM
xepma

3 
1,352 
I need find polynomials of scattering of 2 spinless particles. in a dual model the invariant amplitude.
I need find...

Apr1809 08:57 AM
ElianeUnifei

0 
953 
what are the reasons for why its believed that a smaller wave can have a higher ammount of energy? it seems...

Apr1909 01:08 AM
hurricane89

0 
1,023 
Hey everyone,
Okay so usually drellyan is shown as interaction of p + p^bar: quark + antiquark > virtual photon...

Apr1909 03:23 PM
bomanfishwow

2 
1,927 
I have questions about the infinitesimal Lorentz transformation. but specifically about index manipulations.
...

Apr2009 01:36 AM
malawi_glenn

4 
2,961 
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 
1,329 
Hi,
I have a simple question related with asymptotic freedom.
Quarks behave as free particles at small distance...

Apr2009 01:12 PM
Bob_for_short

4 
1,657 
I have been doing an experiment on muon lifetime, and am wondering if my count rate is correct.
A little about the...

Apr2009 08:39 PM
Bob S

10 
3,143 
Hey, I am a complete noob to the particle physics realm and I am writing a paper on the Higgs Boson and Higgs field. ...

Apr2109 10:04 PM
WalkrTxsRangr

0 
861 
Neutrinos are almost massless, travel close to the speed of light, and pass through matter almost undisturbed. ...

Apr2409 12:11 AM
malawi_glenn

16 
2,947 
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 
1,071 
I meant to title it "Neutrons packed together"
Since neutrons can be packed together in a neutron star, would it be...

Apr2409 03:00 AM
Lantzelot

5 
1,633 
independently these two points make sense but when you put them together it seems as if they should be consistent:...

Apr2409 06:00 PM
kashiark

4 
1,572 
If the generators of the Lorentz spinor transformation can be expressed in terms of the gamma matrices (which can be...

Apr2409 06:10 PM
genneth

11 
3,670 
Has anybody heard of this? Apparently, extremely highfrequency and highintensity light can knock out electrons in...

Apr2509 01:08 AM
sanman

0 
968 
If you have a spin system where integrating out spins leads to new interactions ie proliferation, what happens if you...

Apr2509 01:57 AM
Bobhawke

17 
3,473 
Hi,
I have a question about this decay: \pi^ \rightarrow e^ \overline{\nu_e}
there is a factor:
1 ...

Apr2609 03:09 PM
clem

2 
1,619 
Hey I'm new to this forum, just want to say hi! I'm not sure if this is the rite place to put this but sry if i posted...

Apr2609 08:01 PM
kchkwan

6 
1,639 
(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 
Is there a collection somewhere of particle interaction descriptions? For example, if I'm wondering what an...

Apr2709 05:00 AM
Tokipin

2 
1,078 
anyone know what research is being done in CP symmetry violations and Matter Antimatter Asymmetry currently?

Apr2709 04:04 PM
Parlyne

5 
1,951 
Trying to study Betadecay, but can't seem to be able to tell the difference between the two. Can someone help?
...

Apr2809 06:50 PM
trv

6 
5,483 
when do high energy photons become a paritcle/antiparticle pair?

May109 03:47 PM
kashiark

12 
2,294 
This is probably a naive question, but I've been trying for awhile to figure it out myself and just don't have the...

May109 09:56 PM
sphere3

6 
2,162 
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'm trying to clarify the terms "nuclear effect" and "atomic effect".
Due to the synonymous use of nuclear and...

May209 09:15 PM
kashiark

3 
3,630 
So what has to be right for a metal to release electrons when shot with a light? if you use more than whats needed...

May309 11:31 PM
mgb_phys

5 
2,466 
I need to know the practical applications of the absorption of gamma rays in materials.

May409 12:48 AM
malawi_glenn

4 
3,510 
How do I calculate the mass absorption coeficient ao lead given the linear absorption coeficient and the density of...

May409 12:52 AM
malawi_glenn

2 
1,520 
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 
2,187 
Hi, could someone please try and figure out where I'm going wrong here.
This is a calculation for a collision between...

May509 07:41 AM
fatra2

5 
2,417 
In beta decay, positron emission, how come the condition for decay is:
M_p > M_d + 2m_e
Thats: atomic mass of...

May509 05:01 PM
malawi_glenn

8 
3,240 
Since the 4vector A couples to the conserved current j^\mu = \psibar gamma^\mu \psi in QED, k_\mu...

May609 04:52 PM
RedX

4 
2,461 
If the momenta on the three external legs p(incoming fermion), p'(outgoing fermion) and
pp' (photon) of a vertex...

May709 01:35 AM
malawi_glenn

3 
2,053 
Question leads on from others where s^1/2 = 200GeV mH = 70GeV EH = 91.5GeV and p = 59GeV, (three momentum).
The...

May709 04:31 PM
clem

3 
1,445 
hi e1,
sorry for one, to bring a post this big, b4 I even introduced myself;
originally, i made it for a different...

May709 09:52 PM
cassand^Ra

0 
1,192 