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Feb2313 08:41 AM
ZapperZ

1 
25,938 
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...

Jul1814 12:32 PM
ChrisVer

187 
62,536 
where do dark matter, dark energy, and virtual particles fit in the standard model? if those three mystifying...

Sep1907 04:37 AM
George Jones

6 
3,263 
can someone please try to explain to me how a particle can have negative energy  specifically how one particle from...

Nov1809 04:02 PM
blechman

3 
2,331 
sort of a parallel thread to the current thread about "fields are more fundamental than particles".
pretty much...

Feb2811 03:52 PM
dextercioby

6 
1,405 
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 
761 
In my nuclear physics textbook (from 1988), there's a section which lists properties of the nuclear force, including...

May106 12:18 AM
JoAuSc

4 
2,891 
Hi everyone,
I have studied QFT, the SM and the Higgs mechanism when I was in university and after reading an...

Apr2514 09:26 AM
andrien

5 
759 
Hello,
I've a question: Does anybody know a book, paper or thesis where I can find a "simple" Loop Correction of a...

Feb1812 02:16 AM
Jodahr

0 
1,043 
I have a question about Feynman Diagrams:
let's say we have a process: up antidown > W+ > up antidown...
the...

Mar3012 07:03 AM
AdrianTheRock

2 
1,616 
Hi @ all,
I have a question about IR divergences at hadron colliders. I can see that there are also IR divergences...

Jul3112 07:48 AM
Jodahr

0 
765 
Hello @ all,
I have a few short questions. If we compute the DY process with NLO computation we get rid of the UV...

Sep1712 01:22 AM
Jodahr

0 
725 
Hello,
How can I convert the number of events + the luminosity in a cross section?
I think this must be...

Sep1912 08:14 AM
mfb

7 
918 
Hello everyone,
I have a question about virtual corrections of an external fermion line.
According to the LSZ...

Oct2713 05:47 AM
andrien

2 
1,130 
I'm looking for a book written for nonscientists that has details about axions. As far as I know, they are particles...

Apr1210 12:56 AM
ansgar

5 
1,316 
dear sir
what is a nuclear radiation?
thanks

Jul304 06:33 AM
Redfox

4 
1,738 
Hi,
I thought pions were assigned parity of 1, but how then can the Pi0 decay into two photons with parity 1?? ...

Mar1807 05:46 PM
Joe1

5 
4,498 
Hi,
Could someone briefly explain Cabibbo suppression to me? I can't seem to find any info on it. Is it like OZI...

Mar1807 09:03 PM
Joe1

2 
2,973 
recently,i am focusing on studying the nuclear model, can you recommend some articles ,good review and Classic...

Dec1909 06:29 AM
Norman

4 
1,390 
The nuclear electric quadrupole moment is a parameter which describes the effective shape of the ellipsoid of nuclear...

Dec409 10:23 AM
bcrowell

8 
6,739 
Hi All,
I'm wondering what the difference is between flavor and isospin.
If you own a book by Griffiths titled...

Jul1307 10:10 AM
Meir Achuz

6 
2,649 
Hi there,
There has been 2 questions that bother me and couldn't find a good answer to them. Maybe some experts...

Jul2007 07:18 PM
meopemuk

4 
3,237 
Hi All,
I'm self teaching myself QFT from a lecture notes provided by my Prof. And I'm really confused by the...

Aug607 04:50 PM
joechien0218

0 
2,794 
Has the value of the Magnetic Momentic of the Tauon been determined experimentally in Units of Joules/Tesla? I have...

Feb404 12:10 AM
Orion1

1 
2,982 
It seems that for the case of the Electron in the Ground State of the Hydrogen Atom that when the value of the Binding...

Mar1404 04:04 AM
joecoss

2 
6,300 
(1) Is it true that when a pair of particles is created from a Photon, that the Photon Energy (h x nu) is equal to...

Mar1904 08:53 PM
mathman

2 
1,780 
Concerning the Magnetic Moments of the Nucleus (Nuclear Magneton mu sub N) and the Proton (mu sub p) respectively, is...

Jun604 11:59 PM
Orion1

1 
2,928 
At the beginning of cpt 9, Griffiths states that massive bosons have three polarization states (m_s = 1, 0, 1), but...

Feb313 12:30 PM
Bill_K

1 
787 
I need to find the statistical error in a counting experiment. Specifically, a decay can proceed via option A or...

Jan2813 09:33 PM
Meir Achuz

2 
849 
I'd just like to clarify something I read on Wikipedia:
"The branching ratio of the common purely leptonic tau...

Jan2413 10:15 AM
Einj

1 
907 
https://particle.phys.uvic.ca/twiki/pub/Main/AlisonFaulkner/DrellYan.jpg
The Feynman diagram for Drell Yan has a...

Jan3013 10:46 AM
jtbell

10 
1,449 
The parity operator has eigenvalues of +/ 1 and particles can have intrinsic parity of +/ 1. What does it matter?...

Feb1013 08:06 AM
mfb

1 
701 
I am confused about when and to what extent parity is violated in weak decays.
On the one hand, there's Wu's famous...

Mar1813 11:39 AM
ofirg

3 
856 
I am reading about group theory in particle physics and I'm slightly confused about the word "representation".
...

Mar1713 01:34 PM
JoePhysicsNut

2 
757 
A quark and antiquark have opposite parity. The quark is customarily taken to have positive parity. I understand this...

Apr313 11:35 AM
JoePhysicsNut

2 
1,277 
The W couples to lefthanded particles only. What about the Z? Is it the same?
Thanks in advance!

Apr2313 07:22 AM
JoePhysicsNut

2 
878 
Both Rho^0 and Pi^0 are bosons so require an overall symmetric wavefn. However, they are in different spin states: the...

May913 03:19 PM
JoePhysicsNut

3 
621 
I had a look at the production cross sections for W/Z at hadron colliders. These differ as a function of energy with...

Jul513 12:06 PM
Vanadium 50

2 
963 
Why is it necessary to use Monte Carlo methods in high energy physics?
There is Feynman calculus to evaluate matrix...

Jul713 03:43 PM
RGevo

2 
963 
I've heard of cosmic rays affecting measurements made at the LHC in the context of muons. Is it just muons that can...

Jul2313 03:09 PM
JoePhysicsNut

3 
1,182 
Why is there seemingly so little interest among particle physicists about discovering the graviton? Is it because it...

Aug214 03:10 PM
mfb

4 
509 
Of the 61 known elementary or fundamental particles, which ones exist in the everyday, "natural" world of the Earth,...

Jul3014 03:23 PM
ChrisVer

2 
377 