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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
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 26,157
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 63,321
This probably seems naiive, but why? My main question being that why isn't hydrogen the most stable. It is the...
Sep13-12 07:30 PM
Astronuc
7 3,955
This has been really bugging me. Beta plus decay is when a proton emits a positron in order to convert to a neutron,...
Jun20-12 10:49 AM
iced199
3 1,120
You have 100 grams of radioactive material, how do i know the half life and the time i have 100 grams of material...
Aug25-10 06:49 PM
Integral
29 3,369
Well, hi guys, I know I am new to this forum and all but I am having a mental block with one of my physics questions....
Oct19-03 02:18 PM
lavalamp
1 3,049
I'm looking at charmonium and its decays. Given a list of data on the charmonium states I'm asked to say why ψ'' has...
Apr14-14 07:20 AM
Einj
2 620
DZero experiment at the U.S. Department of Energy's Fermi National Accelerator Laboratory have discovered a new...
Nov6-08 10:16 AM
clem
3 1,662
What actually is charge? :confused: Hmm, I'm trying to think of a way to elaborate the question to make myself sound...
May23-05 07:49 PM
Tom Mattson
18 2,425
Hi, I am a novice to nuclear physics and I was reading some stuff about quarks and how they can possess...
Jan10-12 03:01 PM
AdrianTheRock
2 1,141
What are the general features you should look for when classifying an arbitrary particle interaction according to...
Apr12-12 02:40 PM
Identity
2 1,332
I have a problem where it's said that the operator Q is likely to be: Q=\sum^3_{i=1} I have to apply this to the...
Jan4-13 02:37 PM
idontkonw
4 1,203
To my understanding this is an electron in the K-Shell being absorbed by the the nucleus and along with a proton...
Jun3-09 07:19 AM
quZz
14 2,285
I thought protons couldn't decay and Im pretty sure I've read it a few times as well but then with B+ Decay: p -> n +...
Dec31-08 09:32 AM
tiny-tim
3 1,175
i just learned that quarks are always paired with antiquarks, and i wonder what effect keeps them from turning into...
Sep27-11 09:03 PM
ihatelolcats
2 4,373
Hi, Could anyone tell me what type of statistical test is used to estimate the parameters of the standard model? ...
Nov24-09 03:04 PM
daschaich
2 797
Hi! I hope I've posted this in the right section, but it definitely deals with the nucleus, so here goes. I'm doing...
Mar31-10 09:47 PM
Bob S
18 5,750
Dear All, I've some confusion/doubt and want to clear those :smile: . They are following, 1....
May29-08 08:52 AM
ikku
0 2,339
Hi all, If I take an action involving two point particles coupled together by a delta function contact interaction...
Jun8-13 03:09 PM
Illuminatum
2 1,004
with this technique that has been used to detect quarks, are the results reproducable every time? or are there...
Apr16-09 11:29 AM
Bob S
5 1,371
the whole concept, I just don't get it. really its the unification I don't really understand. does flavor turn into...
Jun23-09 10:29 AM
benk99nenm312
12 2,984
Hi all, I would like to ask why only Protons were selected for collision in LHC project? Why not other fundamental...
May25-13 07:28 AM
mfb
8 1,353
The IAEA and ISO have introduced a new radiation warning symbol meant to be used on high activity Category 1, 2 and 3...
Mar7-07 09:19 AM
QuantumPion
6 2,735
No luck getting an answer in the astophysics forum, let's try here. An article. http://arxiv.org/abs/0903.4450 ...
Aug13-12 08:41 PM
ImaLooser
0 649
When an electron is orbiting a proton, why is it not compelled to be attracted to the proton? Why doesn't it stick to...
Jul1-04 01:30 AM
elas
8 1,820
I am trying to do some plots for determining the range of higgs mass. Can somebody tell me how to plot higgs mass...
May20-12 01:40 PM
Imraan Pervez
6 1,709
When I opened up the "High Energy,Nuclear,Particle Physics" section, it was kind of like "Holy $#^*!!!- I don't know...
Jun24-14 12:44 PM
mfb
4 708
How is it possible to have a pion that is made up of a linear combination of quarks? I mean, what are the physical...
Jun21-07 02:52 PM
humanino
15 2,805
I was wondering what the different between pseudorapidity and rapidity was (pertaining to a high energy accelerator)....
Jul1-07 03:05 PM
Hans de Vries
5 4,644
I was wondering if there were any sites or if any one of your could explain cross section weighting relating to HEPP....
Jul3-07 02:04 PM
indigojoker
0 1,494
Hi all, I'm trying to teach myself high energy physics and was wondering if any one knew a good reference site on...
Apr22-08 01:09 PM
indigojoker
30 5,378
in HEP, what exactly is the definition of soft particle? also, why are branching fractions \Gamma in GeV instead of...
Apr4-08 09:39 AM
genneth
9 2,031
Is there a difference between (1-\gamma^5) and (1-\gamma_5) ? I see the two used interchangeably when...
Apr26-08 07:18 AM
Mr.Slava
6 1,862
Would anyone know of any textbook that has explicit calculations of cross section using intermediate vector boson...
Apr25-08 09:54 AM
nrqed
5 2,202
I am baffled by what exactly it means to have the following (ingoing, outgoing) lepton pair configuration: (0,\nu_L...
Apr23-08 07:02 AM
indigojoker
0 1,349
Co-60 is produced from Co-50 through neutron activation. Neutron flux 10^18 nuetrons/(s*m^2). cross section is 20...
Nov27-13 06:12 PM
mfb
3 682
Could someone please explain how the Feynman Lectures in Physics is relevant to a Penning Trap? :smile:
Jun8-05 01:57 PM
infinitetime
0 1,374
Hi, If we calculate the flux at a certain distance from a source of radiation by first neglecting the effect of...
Nov8-09 04:27 PM
Bob S
9 1,850
I am aware that there is strong evidence for the presence of quarks inside of protons and neutrons through the...
Oct27-09 09:33 AM
inflector
11 2,442
I've been reading about the T2K experiment where a "neutrino beam" is being sent from the J-PARC accelertor in Takio...
Nov27-09 09:58 PM
Bob S
9 1,471
I've been reading most of the threads here in particle physics forum. Recently, I noted a couple of threads started by...
Dec21-09 11:37 PM
humanino
17 3,030
I'm trying my best to learn particle physics and cosmology for the last year or so. One of the concepts I'm trying to...
Aug2-10 01:16 PM
The_Duck
33 6,396

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