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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 58,920
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 25,202
Hello all . If there is not higgs boson that mean all elementary particle travel velocity of light through space ?
Feb6-13 02:58 PM
tom.stoer
14 1,466
Is it possible to bombard Ir 193 with alpha particles to create Au 197? If it isn't why not? And if it is why has no...
Feb6-13 09:51 AM
arivero
8 1,123
I am looking for an alpha detector to do an alpha spectroscopy (and maybe beta as well). The rough setup is a vacuum...
Feb6-13 09:44 AM
SAXSIST
3 1,013
what is the relationship between long range macroscopic forces and classical coherent states?and why cannot fermionic...
Feb5-13 01:41 AM
alirezata
0 546
At the beginning of cpt 9, Griffiths states that massive bosons have three polarization states (m_s = 1, 0, -1), but...
Feb3-13 12:30 PM
Bill_K
1 766
Hello all, My son and I have been doing experiments with a simple cloud chamber and I am curious what type of...
Feb3-13 08:43 AM
Vanadium 50
3 736
Which of the following should occur at a greater rate: D0 to K(-) + (pi)(+) OR D0 to K(-) + positron + electron-flavor...
Feb3-13 06:47 AM
mfb
2 548
A usual lore from chiral perturbation theory is that the mass of the pion is proportional to the sum of the up and...
Feb2-13 05:58 PM
arivero
8 1,752
I have not yet studied experimental physics!But I would like to know how can we measure the mass of quark,because we...
Feb2-13 02:52 PM
mfb
8 1,270
Can the rho(0) meson decay to a pion(0)+gamma ray? If so, which, between this decay and the decay to pion(+) + pion(-)...
Feb2-13 12:37 PM
Vanadium 50
3 2,231
Hi all. I am new here but i decided to work a bit more and finish my diploma faster so i think i will use this forum...
Jan31-13 09:25 PM
Hepth
1 1,076
hello, all, I'm trying to use degenerate volume distribution to build a cylindrical surface source, but it...
Jan31-13 02:45 PM
seedsluis
0 623
How can we propose the existence of a massless graviton when the recent discovery of the higgs boson means that there...
Jan30-13 06:01 PM
tom.stoer
6 1,842
Greetings all! Can someone please give me a clear distinction between knock-out and knock-on nuclear reactions. Or...
Jan30-13 04:48 PM
Fizzle01
0 628
why is that particles such as the tau muon have a short lifespan and why is it that particles decay into other...
Jan30-13 02:02 PM
mfb
3 728
These are things about the higgs boson that am confused with: 1: how does particle physics explain the weakness of...
Jan30-13 11:29 AM
mfb
7 1,158
https://particle.phys.uvic.ca/twiki/pub/Main/AlisonFaulkner/Drell-Yan.jpg The Feynman diagram for Drell Yan has a...
Jan30-13 10:46 AM
jtbell
10 1,394
Hi all what is meant isospin asymmetry for nuclear matter ? thanks alot
Jan30-13 03:26 AM
tiny-tim
1 836
A few years ago, Tamar Friedmann (then at MIT) wrote two papers proposing a new interpretation of the hadron spectrum,...
Jan29-13 07:48 PM
Vanadium 50
1 894
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 1,284
I have been reading a lot about nuclear plants and how when things go wrong the whole area becomes inhabitable. I have...
Jan29-13 06:20 AM
mfb
3 1,228
A question I'm sure I've seen asked here and/or elsewhere is why there doesn't seem to be any classical force...
Jan29-13 04:26 AM
Bill_K
3 927
I need to find the statistical error in a counting experiment. Specifically, a decay can proceed via option A or...
Jan28-13 09:33 PM
Meir Achuz
2 825
Hello Everybody, I am learning QFT using Sidney Colemans lecture notes (and the Peskin Schroeder book). They can be...
Jan28-13 01:54 PM
silverwhale
4 814
Some researchers seem to have measured the proton as being 4% smaller than previously thought: ...
Jan28-13 09:25 AM
mfb
4 948
Why do some isotopes occur naturally even though a seemingly valid decay with non-negligible energy release ~Mev,...
Jan27-13 09:02 AM
snorkack
6 1,018
Okay, so I've just begun to have a grasp on the concepts of quantum chromodynamics. And what amazes me is that quarks...
Jan27-13 08:07 AM
AdrianTheRock
11 2,388
Material in context is in a different color (blue) Okay I'd like to first begin by claiming/stating a few things....
Jan26-13 12:31 PM
mfb
5 1,023
Hi! I have a little problem. Consider a 4-fermion interaction (neglecting constant factors) of the form ...
Jan26-13 06:22 AM
andrien
1 721
Say we have a particle, what are the most fundamental properties that distinguishes it from another kind of a...
Jan25-13 10:58 AM
mfb
13 3,080
Or, more generally, can we destroy a nucleon? I know we can convert between a proton and a neutron, but what about...
Jan24-13 08:15 PM
Aromal
8 1,891
I'd just like to clarify something I read on Wikipedia: "The branching ratio of the common purely leptonic tau...
Jan24-13 10:15 AM
Einj
1 888
Physicists often remark about the absence of antimatter in the universe. My question here sounds simple, but the...
Jan24-13 03:33 AM
Simon Bridge
4 832
I've read that the experimental results of Z-Boson resonance confirm the theoretical expectations that there are...
Jan22-13 07:06 PM
Ngineer
3 943
What's the least energy required to create a fundamental particle of mass m,what would be ur answer? mc^2 or 2mc^2 ...
Jan22-13 05:05 PM
Ezio3.1415
5 930
I read that matter-antimatter annihilation is not as useful as we thought because a large amount of energy is carried...
Jan20-13 04:30 PM
mfb
3 1,122
On decays I have only a preliminary understanding. I was looking up the half life of a neutron for another reason. ...
Jan20-13 01:02 PM
Mordred
2 2,625
Hi, I am reading in some books that after the \beta-decay of neutrons, the maximum energy of the resulting...
Jan20-13 04:05 AM
mfb
2 938
I remember learning that a pseudoscalar is one that changes sign under a parity inversion, like the determinant of a...
Jan18-13 04:27 PM
D H
3 1,211
I understand that nucleons (protons and neutrons) consist of 3 valence quarks and a sea of other stuff, virtual...
Jan18-13 09:05 AM
mfb
6 1,004

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