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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 61,655
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 25,736
I'm not sure which location to post this in; but since it deals with the very small (sub-atomic), then I'll post it...
Oct16-07 09:02 PM
Rahmuss
2 1,333
Hello you guys. I was wondering about the energy limits of the gamma rays. I allready know that the gamma ray spectrum...
Aug15-07 07:55 PM
chroot
2 2,409
An electron has a negative charge and a proton has a positive charge, we say. Meaning that both are opposites of each...
Aug30-07 03:31 PM
dextercioby
2 1,844
This has been annoying me since I read this somewhere. Beta decay is only possible if energetically allowed. For...
Sep1-07 01:57 PM
Astronuc
2 3,088
The muon energy loss equation (at high energies) is: -dE/dx = a(E) + b(E)E where a(E) represents the ionization...
Sep21-07 05:08 PM
Astronuc
2 1,529
If you have a proton and an anti-proton travelling in the same direction with momentum from A to B but during the...
Sep5-07 07:45 AM
max_emerso
2 1,733
From Resonance(s) http://resonaances.blogspot.com/2007/09/drowning-hierarchy-problem.html Extremely contrived,...
Sep12-07 05:29 AM
Haelfix
2 1,682
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 1,350
Dear all, Have you any idea about the electron speed at 0K when the electron is free? Patrick
Sep14-07 12:23 AM
Gokul43201
2 1,807
I'm looking for some resources, as part of a project, where the deuteron quadrupole moment is worked out (from, say,...
Sep24-07 08:37 PM
rahuldandekar
2 1,913
What research steps must be taken before we are able to convert hydrogen into carbon, oxygen, potassium, and so on? My...
Oct30-07 04:11 AM
pallidin
2 2,091
QED = Quantum electrodynamics. QCD = Quantum chromodynamics. Is Electroweak Theory = Quantum flavordynamics (QFD)?...
Oct31-07 05:01 PM
Urvabara
2 3,016
Hi, as I understand the photon can according to todays theory have a very small mass. What would this actually mean if...
Nov6-07 02:13 PM
blechman
2 2,623
uranium is f-block element..is there any relation between f-block elements and nuclear fuel...what i mean is ,i think...
Nov9-07 07:49 AM
Astronuc
2 998
I recently had a test question posed to me that asked firstly for an explanation of the terms in the semi empircal...
Nov16-07 04:59 AM
genloz
2 1,847
I know we use radioactive elements in nuclear reactors and the heat given of to generate electricity in the...
Nov16-07 04:04 PM
mathman
2 2,958
Hi.. I recently stumbled across a question that seemed a little bit odd "Show that the set of rotations in a plane...
Nov16-07 08:26 AM
Norman
2 1,394
I read this in a paper: Suppose there is a theory describing fermions transforming nontrivially under SU(3) gauge...
Nov23-07 09:36 PM
blechman
2 4,449
Can anybody help me with two confusions regarding notations in group theory/topology? 1. When we consider symmetry...
Nov25-07 10:51 AM
George Jones
2 3,220
I am trying to study QFT from Weinberg's Vol. 1. I am at the moment stuck at the path integral quantization of QED...
Dec3-07 02:28 PM
Reggaerules
2 1,583
I'm in a hurry so I'm going to say this quick. For angular momentum you have = i\hbar \varepsilon _{ijk} J_k ...
Dec20-07 10:23 AM
blechman
2 1,375
Suppose a beta particle source. Using a G.M. scintillator and several aluminium foils we can find the absorption of...
Jan5-08 11:09 AM
Astronuc
2 5,676
Hi i got a short question if i know the following U238 decays spontaniously to 2 Neutrons and Tellurium136 and some...
Jan8-08 09:16 AM
Mr.Brown
2 3,422
What does it mean when they say s wave cross section, p wave cross section .. ?
Jan22-08 01:40 PM
Smoochie
2 2,999
Hello, I understand that the non-zero (or non-small) rate for \pi^0 \rightarrow \gamma\gamma was historically a big...
Jan30-08 10:57 PM
Avodyne
2 3,573
http://xxx.lanl.gov/abs/hep-ph/0703260 Unparticle physics is currently a very popular research area. (The initial...
Mar11-08 04:15 AM
Demystifier
2 1,880
I don't have access to Georgi's and Wilcheck's work, if somebody has some good links to an overview of the su(5),...
Feb1-08 02:27 AM
Barmecides
2 1,782
In equation (2.5.47), I am getting U(R(\hat p) = e^{+i \phi J_3} e^{+i \theta J_2} Instead of the "-" signs...
Feb4-08 08:56 AM
Reggaerules
2 1,154
Can there be cases where the cross section for the production of a radiative soft photon or gluon be larger than its...
Feb11-08 09:30 PM
Vanadium 50
2 1,915
I'm currently taking intermediate Lab II (Physics 414) and we're currently working on Gamma Ray Spectroscopy. We are...
Feb13-08 02:18 AM
Vanadium 50
2 2,889
Hello All, I was doing some research on different particle accelerator designs when I came across this interesting...
Feb13-08 03:36 PM
Jdo300
2 1,407
Why do they always say parity is maximally violated in weak interaction? This is true for W boson interactions. But...
Feb13-08 07:35 PM
pam
2 1,766
Could someone please explain why relatively light nuclei do not undergo spontaneous fission? Thanks.
Feb15-08 06:49 PM
Vanadium 50
2 2,803
Hello, I'm having trouble finding the rest energy of delta, on the internet. Can anyone give me this value please....
Feb19-08 03:50 PM
pam
2 1,813
Alright, I've been looking around for an opinion on this for awhile: Suppose you have a tube of deuterium whose...
Mar1-08 03:17 PM
Astronuc
2 1,214
A search of Quark-gluon_plasma at arxiv.org gave 112 hit for 2008...
Mar28-08 10:20 AM
jal
2 3,369
I'm reading Feynman's book QED, and while I'll need at least another couple of read-throughs to grasp what I can,...
Mar27-08 03:57 PM
rks1222
2 3,836
Hi All I have some questions about monopoles, I would be grateful if someone help me in answering them. 1-Does all...
Mar25-08 12:09 PM
Haelfix
2 1,260
Hi, While googling around further, I came across this reference: ...
Apr3-08 05:32 PM
sanman
2 1,266
Hey folks, I have a pretty interesting Lagrangian setup: \mathcal{L}=-\frac{1}{4}(\nabla_a u_b -\nabla_b...
Apr5-08 04:22 PM
robousy
2 871

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