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Feb2313 08:41 AM
ZapperZ

1 
25,026 
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...

Jul1814 12:32 PM
ChrisVer

187 
57,771 
(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 
1,745 
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 
763 
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 
825 
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 
888 
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 
1,390 
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 
683 
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 
837 
I am reading about group theory in particle physics and I'm slightly confused about the word "representation".
...

Mar1713 01:34 PM
JoePhysicsNut

2 
744 
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 
1,210 
The W couples to lefthanded particles only. What about the Z? Is it the same?
Thanks in advance!

Apr2313 07:22 AM
JoePhysicsNut

2 
846 
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 
606 
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 
942 
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 
936 
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 
1,155 
Why is there seemingly so little interest among particle physicists about discovering the graviton? Is it because it...

T 11:42 AM
joeyb9

0 
1 
We know that the Higgsparticle gives an explanation as to why there is mass in the universe. But mass has another...

Jul412 06:21 PM
Ricky116

7 
1,715 
Some time agoo I read in a posting here that someone had pedicted a SM Higgs mass around 126 GeV because a heavier...

Jul512 08:40 AM
johanw

0 
583 
I had always assumed that the simplest possible standard model Higgs particle had isospin 0, but when I tried to...

Jul912 06:33 AM
johanw

2 
1,278 
I seem remember hearing that spin1 was ruled out but since reading this paper I am unable to find any info on spin1...

Feb2213 08:19 AM
Bill_K

2 
161 
At school I was taught that when any matter particle is accelerated until it almost reaches light speed, its mass...

Jul712 02:07 PM
alemsalem

1 
778 
The LEP collider operated at a maximum of 209 GeV. Could it have been used to confirm the existence of the 125.3 GeV...

Jul912 02:18 PM
mfb

3 
764 
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 
1,576 
I'm trying to calculate the symmetry factor in this diagram.
I'm calculating in a way expanding the interaction...

Dec712 07:20 AM
johnahn

0 
766 
Lagrangian I have is little bit massy so I don't write in here.
Like in ψψ(dagger) , or ψ∅ > ψ∅, How can I...

Dec1412 02:48 AM
andrien

2 
875 
Hi,
I understand that antiparticles have the opposite charge to particles.
Do antiparticles have the opposite...

Feb512 06:35 AM
clem

9 
3,852 
Has a very light (less than 1eV) Higgs mass been excluded by theory and/or experiment?

Sep2611 09:51 AM
fermi

2 
1,722 
Is this the correct form for a Dirac electron in a Higgs field with scalar potential \phi and an electromagnetic field...

Dec2111 07:06 PM
johne1618

2 
2,455 
I understand that the the Higgs field has a vacuum expectation value of 246 GeV.
I think that means that the...

Dec1211 01:32 PM
Bill_K

1 
2,519 
Would electromagnetic coupling between an electron with charge e and an electromagnetic field with scalar potential...

Dec1311 12:32 PM
BDOA

3 
2,620 
If most of the mass/energy of a proton is due to the kinetic energy of its quarks and gluons, rather than interaction...

Dec2011 02:38 PM
torquil

15 
3,098 
The Dirac electron in the Higgs vacuum field v and an electromagnetic field with vector potential A_\mu is described...

Dec2711 04:24 AM
johne1618

7 
2,073 
Hi,
Despite decades of searching magnetic monopoles haven't been found.
Could it be that they are existing as...

Apr212 08:53 AM
ZapperZ

1 
1,131 
Roger Penrose in Chapter 25 of his book The Road to Reality describes a "zigzag" model of the electron that consists...

Jul2212 06:48 AM
johne1618

8 
1,939 
As I understand it in a normal superconductor electromagnetic fields are extinguished by opposing fields produced by...

Jul2512 04:51 PM
Bill_K

1 
904 
What is the current state of the hypothesis of mirror matter today?
Are there any experimental data or theoretical...

Apr1013 07:26 PM
kurros

12 
1,322 
I expect you've heard about how the proton's weak charge has been measured directly:
...

Sep2913 09:22 AM
Bill_K

4 
1,154 
Sorry  a very vague question:
Could a superconductor be used to detect dark matter?
The dark matter might...

Nov513 08:16 AM
johne1618

2 
809 
Imagine that two electrons interact by exchanging a virtual photon.
Electron A gains momentum ##\vec{p}## and...

Nov513 07:43 AM
johne1618

2 
867 
Can the classical electromagnetic force between two arbitrarily moving electrons, described by the LienardWiechert EM...

Dec113 03:38 PM
meopemuk

1 
699 
Let us assume that we want to describe the full process of photon emission by electron A and absorption by electron B....

Jan814 03:10 PM
johne1618

0 
648 