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High Energy, Nuclear, Particle Physics

- Properties, relationships, and interactions of subatomic particles. Exp. & theo. physics of nuclei & elementary particles
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Jan16-12 Greg Bernhardt
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...
Jul18-14 12:32 PM
ChrisVer
187 53,017
rules Sticky Thread Pinned: Forum Rules
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Feb23-13 08:41 AM
ZapperZ
1 24,374
And are reactions in particle physics reversible at all? If so, why don't we ever see Gibbs free energy used in...
Mar25-11 03:40 PM
element4
3 1,339
Could somebody explain how an imaginary phase in some of the CKM matrix elements represents a CP-violation factor?
Sep9-08 09:20 PM
hamster143
1 1,338
I am currently reading E=Mc^2 and have a quick question regarding some of the nuclear fusion they describe that takes...
Jan29-12 02:38 PM
Astronuc
1 1,338
I have a few questions regarding matter creation and photon collisions. When photons collide into each other, can you...
Apr24-12 09:26 PM
fzero
1 1,338
I want to know why in many cases when we use optical model to calculate the cross section of nuclear reaction, we...
Feb21-08 08:02 AM
ndtkhanhtrinh
0 1,337
Are there any developed theories to explain why Muons and Taus decay so quickly, and why they don't stick around and...
Oct10-10 07:38 AM
Vanadium 50
1 1,337
In Weinberg's book, Quantum theory of fields-II, he talks about a chair in the chapter on spontaneous symmetry...
Sep26-09 06:43 AM
krishna mohan
2 1,336
Since Higgs boson is a boson and they are said to be the force carriers, wouldn't that imply that there's a new, 5th...
Jul15-12 06:37 AM
tom.stoer
5 1,336
Is there any current theory for the following oddities? 1. Quarks come in pairs (up,down). (charm,strange),...
Mar8-05 04:11 PM
nightcleaner
2 1,335
Let me see if I get it right or I dreamed it: in order to give mass to a quark or a lepton the higgs field must be in...
Sep13-07 05:56 PM
arivero
2 1,335
Does anyone have opinion on this paper by Dr. Mishustin on theoretical possibility of coexistence of matter and...
May26-06 08:03 AM
Rade
1 1,333
Hi! I have encountered many differential crossections: \frac{d\sigma}{dE_+d\Omega _+ d \Omega _-} (Pair...
Oct3-08 08:30 AM
malawi_glenn
2 1,333
Hi All, I've been watching the Weinberg youtube video: http://www.youtube.com/watch?v=Zl4W3DYTIKw and I have...
Jul23-12 03:40 PM
docbillnet
7 1,333
Dear Physics Forum, can anyone tell me which of the fundamental interactions is involved in the Higgs Field? Or...
Sep24-13 03:35 AM
my2cts
4 1,333
Question in title. Indeed, how are any particle masses determined? And especially quarks, since they have the added...
May10-09 02:21 AM
genneth
1 1,332
I've learned the following about the appearance of tracks of particles in a collider: Electron: Doesn't pass...
May31-11 07:40 PM
KyleStreet
0 1,332
Amid the petabytes of information about to stream forth from Europe, how will Physics know if it has been wrong about...
Sep11-08 01:39 AM
atyy
2 1,331
Ok, well I'm sorry if this is the wrong section but it has to do with energy and nuclear physics. I have to present...
Mar11-09 06:31 PM
Bob S
3 1,331
I am a high school physics intern, trying to figure out how calorimeter accuracy affects the recoiled proton's mass in...
Aug11-11 11:34 AM
GilboK
0 1,331
example: 2 protons collide and a down-antidown quark pair is created, giving a pi-plus meson, a neutron and a proton....
Jan17-06 02:48 PM
QueenFisher
2 1,330
Hi guys, i have been simulating the passage of charged particles through my detector, which consist of...
Jul10-10 01:19 PM
Bob S
1 1,330
how the spin is associated with a particle. is there a difference in spin for charge particle and a neutral particle,...
Apr25-07 05:16 AM
marlon
1 1,329
I was wondering whether there's any interactions or productions that has cross section that doesn't only increase...
Aug14-07 09:39 PM
Norman
2 1,329
Such propagators as found in HQET \frac{i}{2 v \cdot k} come about from expanding the full propagator. I'm wondering...
Jan21-12 06:34 AM
Finbar
3 1,329
Hello, I'm trying to understand the standard model, and I'm confused in a few places. Correct me please, if I seem...
Feb10-11 01:37 AM
Parlyne
1 1,328
Axion mass is said to depend on temperature. I don't understand this. Can somebody explain how the mass of an...
Apr19-11 05:00 AM
Bill_K
3 1,328
Hello, my question is : C60 ---> Ni60+e-+anti-neutrino why does Co60 decay to an excited state of Ni60 and not...
Apr1-12 04:35 PM
Raz91
3 1,328
I am curious as to how much energy a photon contains such as one with an extremely high wavelength such as a radio...
Nov30-08 01:58 PM
clem
1 1,327
I have a couple of questions about the standard model: 1.) I read somewhere that the standard model describes 3...
Dec25-08 11:44 AM
blechman
6 1,327
Hi, I have been trying to find out about the upsilon meson (the bottom-antibottom quark pairing) for a piece of work...
Nov14-10 04:37 PM
Vanadium 50
3 1,327
I have a huge 3rd year design lab unit coming up for the next semester. The lab is very much independent work, and I...
Nov23-10 11:54 AM
zheng89120
4 1,327
Hi guys, I'm a bit puzzled. I'm just reading some offline lecture notes where the Feynman rules of real (!) scalars...
Jun7-11 04:08 AM
earth2
0 1,327
Dirac Equation as Example, Dirac Equation: \left(i\gamma^\mu \partial_\mu -m \right)\psi(x)=0 Can I write it in...
May7-13 09:27 AM
PRB147
9 1,327
Hi there, I was wondering if anybody would be able to help me on a question I have regarding the Sokolov-Ternov...
Sep5-12 04:29 PM
Bill_K
1 1,326
Please take a look at the file "Feynman.pdf". The ratio rate for the two decays is shown in the second file,...
Jun2-08 09:42 AM
vertices
3 1,326
2 photons with energies of at least 0.511 MeV are crossing the same spot at the same time - there is 1.22 MeV energy...
Jul19-09 12:16 PM
Vanadium 50
5 1,326
Hi How do you get a photon flux per unit wavelength curve for solar radiation? My understanding of "per unit...
Dec20-12 11:54 AM
mfb
1 1,326
not sure if this is in the right section but... What exactly causes plasma to reach such high temperatures?
Mar26-08 06:00 PM
Astronuc
5 1,325
Hello, I have been trying to understand Roman Pot detectors, but I'm afraid I cannot understand what is going on even...
Apr1-12 04:20 PM
Bill_K
1 1,325
My main area is molecular biology and biochemistry, but I've had a growing interest in particle physics for a while....
May12-12 11:40 PM
Drakkith
4 1,325

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