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If you are seeking help with a...

Feb2313 08:41 AM
ZapperZ

1 
24,583 
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...

Jul1814 12:32 PM
ChrisVer

187 
54,386 
Can anyone walk me through this calculation? I'm not completely sure how to do it (merely a student).
So is this...

Nov2209 04:48 AM
Vanadium 50

1 
761 
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 
761 
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 
762 
Hi all,
Has any one know how to calculate the loop function of Higgs decay to photons/ gluons by t quark , or a...

Apr1313 04:53 PM
Safinaz

4 
762 
spin and mass of neutrino,

Feb2511 11:18 PM
Drakkith

4 
764 
This is related to a homework problem but I want to understand it as well. How can a proton break up into a positron...

Apr1614 11:14 AM
metamathphys

3 
764 
Hi all,
I was wondering, is this scattering process even possible? Since we cannot mix the two neutrinos on one...

Nov412 07:18 AM
mfb

1 
765 
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 
765 
I don't know how (1.10) pops up and why the ##T^a##s satisfy the Lie algebra.
Is there any physical intuition?
Any...

Mar1413 10:58 PM
jfy4

1 
765 
Dear Forum ：
I'm looking for protonproton inelastic cross section in MeV.
There are lots of results in GeV, TeV....

Feb814 04:49 PM
flied

6 
765 
I have some questions about the matrix
<0j^{\mu}_5\pi(p)>=if_{\pi}p^{\mu}
1.Pi is a psuedoscalar particle, but...

Mar1313 11:13 AM
The_Duck

1 
766 
I am doing a research on activation radionuclides resulting from thermal neutron(2200 m*s1 or 0.0253eV) capture. The...

Apr2813 08:14 PM
benpaozhe

4 
766 
Hi every one,
This time i am studying Quantum field theory and some times we call also high energy physics. But when...

Dec213 07:41 AM
K^2

2 
767 
Hello All
I am laymen, but have keen and agile mind.
I would like to ask your help in answering certain...

Nov1209 02:49 PM
st00p1d

0 
768 
Q.) What would happen if a *reverseTokamak* was created, thus reversing the electromagnets to a negative charge and...

Jan1411 02:14 PM
bcrowell

1 
768 
hi folks,
readingthis post:
http://www.physicsforums.com/showpost.php?p=992445&postcount=11
I was wondering why...

Feb810 11:46 AM
Norman

1 
769 
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 
769 
I was listening to this radio program (Google: In Our Time Antimatter) and they kept saying that when an electron and...

Jan2814 03:45 PM
theory.beta

6 
769 
why the topological term in gauge theory, ε_{\mu\nu ρσ}F^{\mu \nu} F^{ρσ} ,is scaleindependent?

Jun2414 06:20 AM
samalkhaiat

7 
770 
What is the Higgs particle and what does it do for us?
How will LHC detect it? What is the signature?
Thanks.

Mar2910 09:57 PM
edpell

3 
771 
I have just learned from nice article
http://motls.blogspot.com/2013/12/edwardwittenwhateveryquantum.html
...

Dec2113 04:17 PM
fzero

2 
771 
Hi
I am loking for those who is doing the reseach on the neutrino physics throughout the world so that we may have...

Jul1509 02:37 AM
thoms2543

0 
772 
Hi,
I am looking into symmetry breaking and how it (may have) affected the photon/baryon ratio in the primordial...

Mar2914 07:53 AM
nSlavingBlair

5 
772 
HERAB used silicon microstrip detectors for their vertex detector. Behind each two sided detector with strips in x...

Feb1610 01:07 AM
Vanadium 50

1 
773 
Hi there,
I have little question: reading zee 2nd edition, I.8 (pag 64) i came up with this:
start with
<k_1...

Jan2011 12:39 PM
CGH

0 
773 
Feynman diagrams is the standard for calculate the probability of nuclear reactions fo particles, but, when we want...

May813 09:06 AM
DimReg

5 
773 
I can't seem to find one, but does anyone have a reference to the fourvector polarizations for a massive vector...

Jun1313 12:43 PM
Hepth

0 
773 
The Polyakov action has three symmetries, namely; Poincare, reparametrization and Weyl. Using the reparametrization...

May1911 12:44 PM
Cesar Damian

0 
775 
If two protons collide at the LHC and a quark from each undergo a weak interaction together to form a W/Z boson, then...

Jan913 07:20 PM
Vanadium 50

3 
775 
Is anyone here familiar (more or less) with the new type of telescope called IACT, Imaging Air Cherenkov Telescope.
...

Sep1609 12:59 AM
Vanadium 50

1 
776 
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 
776 
why massless particle, such as photon, can only have two helicity states?
Photon's helicity is 1,1. Helicity zero is...

Mar2114 02:43 PM
samalkhaiat

4 
776 
When two deuterium nuclei are shot at each other they have some probability of fusing into a He nuclei. At the start...

Jan1412 01:39 PM
edpell

0 
777 
After all, high energy neutrino astronomy seems to have been born!
Ice Cube reported yesterday the measurement of 28...

May1513 07:13 PM
e.chaniotakis

0 
777 
(please note this is similar to a homework question I have posted but it is not the same and here I am just trying to...

May1413 11:11 AM
Hepth

9 
778 
Dear all,
I have a question about the polarization measurement.
In the photo production reaction like γp→πp with...

Jun1012 06:07 AM
tsinghua

0 
778 
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 
Consider
e+e* > q+q* in the centre of mass frame. Where I am using star for antiparticle.
the quark and anti...

Apr1514 07:11 AM
RGevo

9 
778 
The Monte Carlo simulation is a very important tool in particle physics specially to tune in the preciseness of the...

Apr814 02:33 AM
RGevo

3 
779 
Hi,
Given the initial energy of a pion is it possible to calculate the probability and mode of its decay?
Ive...

Mar914 05:22 AM
ChrisVer

8 
780 