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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
187 58,818
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
1 25,183
Hi people: I keep reading one day that weak isospin is exactly conserved by all interactions; other days that...
Oct6-13 04:15 PM
Vanadium 50
9 5,093
Is anyone familiar with Breit-Wigner Cross section? Say, for a reaction with 2 particles in the initial state, 1...
Feb23-05 03:56 PM
1 5,075
Hi everybody, I am a MAC OS X user, and I have a trouble with feynmf package in latex. I have downloaded the...
Sep5-07 02:13 AM
3 5,056
so does the Higg field give the neutrino mass, and can neutrino velocity change? how close to c is neutrino velocity?
May11-11 09:36 AM
Vanadium 50
5 5,053
I was told that if there is a wavefunction containing a proton and a neutron that it must be anti-symmetric under...
Jun24-09 12:43 AM
14 5,053
Hello, So I'm reading about isospin in Griffith's Introduction to Elementary Particles, but the concept seems...
Apr3-12 08:57 PM
59 5,053
The Higgs mechanism can give gauge bosons mass. However, in the electroweak theory, only W and Z get masses, not the...
May28-08 05:58 PM
13 5,044
I'm curious about the isospin of a photon. I have been told it is a linear combination of I=1 and I=0. If I=0, then...
Feb26-04 10:08 AM
3 5,038
At a macroscopic level it appears that when two objects collide, they physically interact and the atoms touch. However...
Sep12-07 02:18 PM
5 5,029
Has anyone heard of Milo Wolff? I recently came upon using StumbleUpon, and read the section...
Apr15-08 03:42 PM
1 5,029
I would like to build a particle accelerator as a science project. I know it may be unrealistic, but depending upon...
Dec17-08 06:49 PM
Vanadium 50
19 5,024
I was curious about the evidence for the above. I found an old discussion here:...
Dec20-10 05:37 PM
20 5,019
So I was lucky enough to visit CERN earlier this year, and they were selling t-shirts with a long equation on them....
May30-11 06:07 PM
8 4,999
Hi everyone, I am wondering why large particle accelerators are not arranged in space around a planet or a moon via...
Jan12-10 05:41 AM
14 4,970
Hi all, I am about to begin my studies as an experimentalist and I keep hearing about these terms when someone...
Jan31-10 04:48 AM
4 4,968
I'm currently in the process of building a new muon detector using PMTs and Scintillators...
Jan3-10 04:28 PM
Bob S
12 4,957
Nuclear forces are said to be non-central. By definiton of central force, angular momentum is constant. It is usually...
Sep17-05 03:41 AM
5 4,950
for my question , i will use the term 'level' hey , we know that the zone we live in is made up of atoms (level 0),...
Apr13-07 01:25 PM
6 4,949
Does anyone know how energetic the most energetic photons ever detected from a natural source were and what their...
Oct29-10 07:14 PM
6 4,944
Can two Bosons 'collide' in the same sense as the Fermions (Since Pauli's exclusion principle is not applicable for...
Aug10-11 01:27 PM
Ben Niehoff
6 4,943
Since a neutron has no charge and an electron is not involved in the strong nuclear force, does this mean that an...
Dec7-08 01:39 AM
12 4,938
how do we "know" it must exist? btw im new here, dont flame me too hard
Jun16-10 03:24 PM
29 4,935
Why heavier particles decay faster than lighter ones? Does Uncertainty Principle explain? How? Does Fermi's Golden...
Aug29-06 10:25 AM
28 4,930
Does anybody know where to get the expected cross section for Z at the LHC (pp at 14 TeV)? (it would be great if you...
Jul13-05 10:55 AM
2 4,915
what is the differece between internal conversion electrons, electron capture and auger electons? i dont understand....
Dec26-11 07:42 AM
1 4,913
Hello, I'm wondering, which force is stronger, SNF or EM, how was it proven that specific force is stronger than...
Apr20-06 05:20 PM
4 4,911
How to show the Proca equation by using the given Proca Lagrangian? Surely, I know the Euler-Lagrange equation, but I...
Nov30-12 10:22 AM
4 4,911
I don't understand where radioactive decay comes from. Everything I've read discusses how the environment can...
Mar17-12 06:40 PM
12 4,911
I'm pretty new to particle physics. Actaully, I'm brand new to particle physics (2nd year undergraduate). I've been...
Mar9-07 06:19 PM
24 4,891
Okay, I decided to start trying to understand the nulceon and delta resonances. Does anyone have suggestions for a...
Mar17-07 12:56 AM
3 4,881
Just look at the simplest Hydrogen atom -- one Proton. The question is *where* exactly is the mass of this thing? Or...
Jan17-09 12:23 AM
20 4,878
Does anyone know what the necessary conditions are for a nucleus to undergo fission with a thermal neutron? I have...
Aug20-07 06:41 AM
7 4,869
I've been looking for a list of all the mesons there are, but cannot seem to find it online. Anyone know just how many...
Feb3-06 05:22 PM
4 4,862
Most common isotopes of He has 2 neutrons, Li has 3 neutrons and so on right, until Z increases to higher numbers and...
Jul18-11 09:51 AM
12 4,862
How did they experimentally verify that there is pair creation and annihilation in the vacuum? What kind of particles...
Jul13-09 11:52 AM
Abbas Sherif
23 4,839
So, watching the chart of isotopes (or nuclides), where I have isotopes put according to how stable they are, I have...
Apr13-12 09:31 AM
6 4,833
Hi, I know that there are a number of different ways that uranium-235 can decay when a slow neutron collides with...
Feb1-10 08:56 PM
2 4,810
Ok, all you people in the know, what's the real low-down on ITER and the possibility of fusion power reactors this...
Jul19-08 05:38 PM
22 4,808
Hi, I'm currently selecting my 4th year undergrad thesis design (its all technical/theoretical no hands on work). A...
Sep14-07 01:59 PM
8 4,794
Hi. Doeas this mean that neutrinos are faster than light?
Oct4-11 10:31 AM
33 4,785

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