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

Jul1814 12:32 PM
ChrisVer

187 
62,473 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:41 AM
ZapperZ

1 
25,926 
Is there a theoretical basis for the spin of the nucleus of an arbitrary atom? I'm looking at this website:...

T 05:48 PM
mfb

6 
148 
Well I'm trying to understand the difference between these propagators:
\frac{g_{\mu \nu}}{k^{2}  m^2 + i...

T 11:59 AM
ChrisVer

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71 
I have a question related to the Lorentz invariance.
(on the book of Mark Srednicki Quantum Field Theory, page 35...

T 08:23 AM
ChrisVer

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199 
I can't seem to find the mass of an anti electron neutrino in MeV. I found that in beta radiation one down quark...

Y 04:34 PM
mfb

8 
1,248 
As is well known, the charges through which particles interact scale with the energy in QFT. What I was wondering is:...

Y 07:22 AM
arivero

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330 
A 100 mg sample of magnesium27 decays by 7% of its previous mass every minute. Determine its halflife and start the...

Aug2914 07:26 PM
Meir Achuz

5 
209 
In the page http://en.wikiped
ia.org/wiki/Hamilton%E2%80%93Jacobi%E2%80%93Einstein_equation, under Shortcomings of...

Aug2914 01:57 PM
ChrisVer

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224 

 
 
 
How would one calculate the velocity of a 1MeV neutron??
I tried the following the attached formula for V/C but E...

Aug2714 05:03 PM
mfb

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412 
I am wondering how Muons are manufactured.
Wikipedia says they're the decay products of cosmic rays, and that...

Aug2714 05:00 PM
mfb

7 
265 
I know how the canal rays are produced. As I looked from wikipedia;
"The process by which anode rays are formed in...

Aug2714 04:55 PM
mfb

4 
305 
What is difference between beta particle and electron? I mean in spin, mass or other properties.

Aug2714 04:47 PM
mfb

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592 
I am curious as to what would happen if you took something that was as cold as you can get and mixed it with something...

Aug2714 02:54 PM
ChrisVer

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220 
What is nuclear evaporation (e.g. proton or neutron evaporation)? Someone can explain?
Thank you very much,
Matt

Aug2514 03:28 PM
Matt_014

2 
296 
Hello to everyone,
I got a little bit confused between the coupling constant g_W and the strength parameter...

Aug2514 01:59 PM
Daaavde

2 
273 
Hi all,
I were wonder how the particles which consisting of four quarks like Z(4430) state ( ##c\bar{c}d\bar{u}## )...

Aug2514 12:35 PM
Safinaz

2 
341 
In Chapter IV.3 of Quantum Field Theory in a Nutshell] by A. Zee (2nd Edition), there is a section titled "Wisdom of...

Aug2514 03:10 AM
mal4mac

6 
410 
I want a book on particle physics which contains lots of theoretical calculations.All books recommended in my class...

Aug2414 08:32 PM
nrqed

4 
450 
Hi
Based on what I know (it might be wrong) properties of nuclei are calculated based on the different (simplified)...

Aug2414 03:04 PM
Bjorken X

7 
449 
Hi there, I need to draw the Feynman graphs for D→KK meson . I would be appreciate if anyone can help me.
Thank you...

Aug2414 12:39 PM
ChrisVer

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383 
Sorry for my questions, (it does seem like QFT triggers quite a lot of questions :D).
Anyway, on page 103 (it has...

Aug2314 08:32 PM
nrqed

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2,299 
Can actually muons interact and give a signal while they go through the Hadron Calorimeter of the ATLAS? I think in...

Aug2314 06:42 PM
mfb

10 
450 
To anyone new to the field of nuclear physics, the units are positively nonplussing. For example, I have just...

Aug2314 07:46 AM
Vanadium 50

1 
251 
Hello, I am interested in computing the optimal depth of a copper absorber for Sr90 decay electrons.
I want to find...

Aug2314 04:44 AM
Orodruin

2 
326 
Hey gang,
I'm reworking my way through gauge theory, and I've what may be a silly question.
Promotion of...

Aug2214 12:40 PM
ChrisVer

7 
402 
Hi,
I have been getting a little confused; the text book (and from what i can see online) are saying that Hadrons...

Aug2114 05:57 PM
ChrisVer

6 
310 
How W boson decay into electron and anti neutrino?

Aug2114 10:37 AM
smk

4 
328 
A gauge field W_\mu is known to transform as
W_\mu\to W'_\mu=UW_\mu U^{1} +(\partial_\mu U)U^{1}
under a...

Aug2014 10:31 AM
The_Duck

8 
437 
The reason why there is far more matter than antimatter in our universe is because we are going forward in time. But...

Aug1914 02:09 PM
berkeman

2 
355 
Hi, I have a question in Srednicki's QFT textbook.
In p.460 section 75(about Chiral gauge theory), it says
"In...

Aug1914 01:08 PM
mkgsec

6 
352 
Hello,
Is there a quantum mechanical reason why elements 119+ might not exist? i.e. would the crazy orbitals...

Aug1814 11:42 PM
pierce15

9 
494 
It is possible to introduce the gauge field in a QFT purely on geometric arguments. For simplicity, consider QED, only...

Aug1814 03:50 PM
The_Duck

1 
525 
I learned that Pauli principle says two fermions cannot be same place than how we can collide two protons actually its...

Aug1714 06:22 PM
UVCatastrophe

5 
552 
I am looking at the structure of protons, and in my script, when they define the Parton Distribution Functions of all...

Aug1614 06:06 PM
RGevo

9 
597 
We know that graviton spin is 2 so other lepton and quarks spin is 1/2 I am confused because If Graviton and a quark...

Aug1614 09:30 AM
mfb

15 
508 
Looking at the attachment, I see that the scalar potential coming from the Dterm of the Higgs sector is given as...

Aug1614 08:35 AM
Greg Bernhardt

1 
705 
At the end of spontaneous symmetry breaking I get these mass terms:
...

Aug1514 04:16 PM
Orodruin

2 
473 
The Monte Carlo simulation is a very important tool in particle physics specially to tune in the preciseness of the...

Aug1414 03:10 PM
DrDanny

4 
1,067 
I am confused about the very step from Eq.(14) to Eq.(15) in the paper
http://arxiv.org/pdf/hepph/0308157.pdf
There...

Aug1314 10:17 PM
Greg Bernhardt

1 
509 
Hi folks,
I am looking a bit at the phenomenon of Sduality (as a bit of an amateur) and looking at the literature...

Aug1314 10:17 PM
Greg Bernhardt

1 
456 