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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 53,978
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 24,532
a proton is given a radius...i think its ~10e-15 since a proton is uud is this "radius" like a electron orbital...
May8-05 10:49 PM
Berislav
5 1,278
group theory is an integral part of particle physics and one needs a good understanding of this before one switches on...
Oct14-05 07:33 AM
preet0283
2 1,278
How do you determine in a particle interaction which force is responsible? For example a K- meson is found to...
Oct5-11 11:38 AM
kaksmet
3 1,278
Hi I've been reading that muons are supposedly leptons (elementary particles), in the past confused for mesons...
Apr1-12 05:31 PM
Bob S
4 1,278
Hi, Is there any good books which explain/calculate Wigner rotation, tensor operator, two-particle helicity state...
Sep8-13 08:43 PM
jfy4
2 1,278
What happens when the electron is removed from hydrogen? Is it just a proton at that point or does it become hydron...
Jun8-07 01:33 PM
humanino
1 1,277
Hello everybody, I investigate polycarbonate foils (makrofol) of 90 μm thickness irradiated by U-ions with a charge...
Nov24-11 10:23 AM
Swain
0 1,277
Back on lecture about Standard model, professor said that original Weinberg-Salam-Glashow theory had to be augmented...
Jun29-08 12:27 AM
ismaili
3 1,276
I am currently writing a talk on CERN that is aimed at non-physicists, however I am finding it difficult to try and...
Nov23-08 01:22 PM
Shomy
7 1,276
Hi, A symmetric 4x4 matrix has 10 independent components. Let's say that matrix describes graviton h_mu_nu. In...
Apr17-12 03:55 PM
Neitrino
0 1,276
Whenever a process yields a photon, an electromagnetic interaction is involved. If a neutrino comes out, a weak...
May19-07 01:30 PM
malawi_glenn
3 1,275
Hi all, me again! :rolleyes: I'm trying to calculate the current created when an alpha particle strikes a silicon...
Dec4-11 01:55 PM
neural_jam
0 1,275
Hello, The Feynman graph of muon decay is...
Mar22-12 04:32 PM
Vanadium 50
6 1,275
I had always assumed that the simplest possible standard model Higgs particle had isospin 0, but when I tried to...
Jul9-12 06:33 AM
johanw
2 1,275
What kind of force mediates the reaction: K- + alpha(ppnn) -> pi- + "hypernucleus"(ppn lambda) s(u) + (uud + uud +...
Feb22-12 03:36 PM
mathman
1 1,274
just thinking cross sections here. a neutron that is freed as a result of a fission of pure U235. travels @c/10(fast!)...
May4-12 07:02 PM
Astronuc
3 1,273
Hello all, my teacher assigned a problem related to the yang-mills equation in my general relativity class and I just...
Jul11-13 08:49 AM
ozone
6 1,273
It seems strange that a neutron wouldn't have a function within an atom other than obtain mass, a neutral charge, and...
May2-08 06:20 PM
Gokul43201
4 1,272
hi, see my diagram here, is my "neutron gun" correct, or have i made mistakes? what will happen to the "uranium...
Nov29-10 06:47 AM
askAphysicist
1 1,272
From here:...
Dec18-12 04:56 PM
K^2
9 1,272
Hi I'm trying to understand how the sum over spin polarizations is treated when using the Narrow Width...
Jan29-13 08:15 AM
andrien
6 1,272
I'm having some trouble deriving equation 6.44 on p.191 of Peskin and Schroeder (my book is the fifth printing,...
May15-13 01:31 PM
Jolb
6 1,271
I've heard that matter antimatter annihilation does not produce required mass to energy ratio at the end, i.e either...
Sep10-10 11:08 PM
DaveC426913
4 1,271
When a massive nucleus splits, it forms two smaller fragments. For Uranium, we have A=235, and the typical fragments...
Jun6-11 12:18 PM
Bill_K
2 1,271
Why is it that those atoms, with atomic numbers of 90 and 92 have much, much longer half lives than atoms like Radon,...
Feb24-13 05:48 PM
Bill_K
8 1,271
If I just know the energy range of it is 10-35 MeV, and they can interact with detector for 10 seconds, how to deduce...
Feb27-12 08:21 PM
robert2734
1 1,270
Hi, I'm reading an article called SuperSymmetric Dark Matter, by G. Jungman et al. doi:10.1016/0370-1573(95)00058-5...
Nov18-12 05:05 PM
cohen990
6 1,270
Hi, I'm just reading about the group SL(2,C). In the book that I'm using(Jones, groups reps and physics), he...
Sep5-10 09:51 AM
LAHLH
3 1,269
In the context of high energy physics (and in other branches too) I sometimes hear that a certain theory has "an...
Jan7-11 10:39 AM
blechman
1 1,269
Hello. I'm new so I am uncertain to which forum this post should be posted in so I'll just leave this here. ...
Jan18-11 06:04 AM
genneth
5 1,269
; Can someone explain to me (in layman's terms,) how it might be possible to associate the interactions of the...
Mar7-12 10:22 AM
tom.stoer
7 1,269
Say we have one spin-less electron in a box in the ground state. Say we have dials on the outside of the box that can...
Mar25-12 04:32 PM
Spinnor
4 1,269
Hallo everyone! I'd like to understand why is it that the sun can produce fusion energy with less heat then the...
May12-12 11:34 PM
Drakkith
4 1,269
hi I have this question, I need your help: If the photon had mass "m" , show that the Gauss' law would no...
May6-07 03:54 PM
Meir Achuz
1 1,268
hi there, now I've been googling around for ages now trying to find this answer but i cant i have read time and...
May27-10 05:36 PM
ansgar
1 1,268
For an Ap Physics Homework assignment our teacher had us calculate the Nuclear Strong Force for a Helium nucleus with...
Sep12-13 06:34 PM
mfb
1 1,268
I would like to ask you 2 completely separate questions... Since both concern the W,Zs I don't want to create more...
Nov20-13 09:50 AM
dauto
14 1,268
hi, my questions are regarding the fundamental interactions. I don't have much physics knowledge beyond high school...
Mar23-12 05:43 AM
AdrianTheRock
3 1,267
Would the observed half-life of a sample of a radioactive isotope (eg. iodine 131) be different from the nominal...
Jun3-12 08:59 AM
mfb
3 1,267
I was wondering, for instance in a neutral pion or the j/ψ meson, what prevents quark-antiquark annihilation during...
Jul23-12 12:59 AM
tom.stoer
4 1,267

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