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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
1 24,823
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...
Jul18-14 12:32 PM
187 56,419
I'm having hard time getting my head around this. If E=mc2, then why do we need a Higgs Boson? Can't all matter simply...
Dec19-12 10:48 PM
13 1,653
seems like a basic question and I'm sure many would answer that these are all "spin-1" particles...but that's not...
Mar22-09 04:55 PM
12 2,512
I'm reading the wiki article on Representation theory of the Lorentz group and they seem to make a distinction...
Sep28-09 08:17 PM
12 3,933
I'm trying to calculate the pauli-lubanski pseudo vector for different representations of the poincare group. The...
Oct6-09 08:11 PM
1 2,365
I am vexed. In your expert opinion can matter and the particles and wave forms of which it is composed be described...
Dec5-12 07:19 PM
Vanadium 50
7 1,655
I'm watching a video on Youtube entitled "Angels and Demons - The Science Revealed" in which the topic of discussion...
Sep23-09 08:08 PM
18 2,484
In the "Beyond the Standard Model" forum there is a thread entitled "What causes gravity???" ...
Jul20-06 08:26 AM
29 3,152
Since the proton is not an elementary particle, why do all protons have the same size gluon string connecting the...
Feb22-12 01:03 AM
11 5,541
This comes from Alex Vilenskin's Many Worlds in One: I didn't think there was such a distance below the Planck...
May19-12 06:46 AM
Meir Achuz
1 1,093
For physics between QM and String Theory I've heard a lot of different names. Quantum Electrodynamics seems to be...
Jun4-12 07:51 PM
3 1,667
We're made of roughly 10^28 protons. Let's imagine that the average lifespan of a proton were 10^28 years even though...
Jun4-12 08:36 AM
5 1,753
i wasn't exactly sure what happens inside particle colliders but i recently learned that they actually take...
Jun9-12 03:21 PM
8 1,752
This comes from Kaku's Beyond Einstein Referring to this chart...
Jun9-12 09:03 AM
2 1,032
this passage is from Paul Davies' the Last Three Minutes: I have a very difficult time believing and...
Jun18-12 08:08 AM
1 989
This is from Lisa Randall's Knocking on Heaven's Door Is weak charge something related to the weak force? What...
Jul1-12 10:30 AM
9 1,687
I was listening to this radio program (Google: In Our Time Antimatter) and they kept saying that when an electron and...
Jan28-14 03:45 PM
6 769
I was wondering if Higgs theory offers an explanation for why the Koide formula gives such precise masses for the...
Dec13-11 09:12 PM
mitchell porter
8 3,228
I was wondering, if there was a hint or a strong signal of a Higgs particle existing around the 125 GeV region whether...
Dec16-11 06:45 PM
6 1,943
I was wondering if there was something similar to the 8 fold way representation used on mesons for the fermions?
Dec17-11 02:18 PM
3 2,340
Hi everyone, this has been bothering me for a while and even though i've done some light reading on this topic im...
Dec17-11 02:29 PM
7 2,871
General relativity shows that gravity is a culture of space time. Suppose that we are in a gravitational field. This...
Apr18-13 07:22 PM
11 1,501
I am a graduate student of micorbiology. My problem is to find out the average intensity of a particular UVC light...
Sep16-09 08:21 AM
0 3,120
Ok, I never wanted to be the guy posting a ridiculous question on physorg. but here it goes. If the Higgs field is...
Jul8-12 02:25 PM
1 694
How do we know that a graviton has to be spin 2?
Oct6-05 03:26 AM
7 8,616
Lets say I am looking at SU(5) and I draw a (young taleux) box and I say thats the 5 rep of SU(5). Then I draw 2...
Oct11-05 12:10 AM
19 2,997
I'd like to ask some questions about the following example of broken symmetry and non-invariant vaccum. The basic...
Oct3-05 06:48 PM
3 2,959
This may sounds like a dumb question but I want to figure out the 'point' of them. I know that isospin was an...
Nov14-05 05:25 PM
11 3,062
Beginners question : In GUTS what is the relevance of anomaly cancellation. Is it in some sense an axiom - like...
Oct25-05 01:08 AM
2 3,238
I am working a problem from the Mohapatra textbook unification and supersymmetry and the question is to show that if...
Oct30-05 09:52 PM
4 1,480
I've been wondering about terms you typically find in the action of a field theory, for example consider the kinetic...
Feb1-08 08:12 AM
4 2,015
I'm trying to work out the steps in the following: -\frac{1}{2}\int\frac{d^{2n}k}{(2\pi)^{2n}}\frac{1} ...
Mar5-08 12:01 AM
9 2,473
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
2 866
Hey folks, I'm not really sure which forum to put this question in but I figured this was probably the best as it...
Jun30-08 03:04 AM
1 1,983
Is the Higgs field 4 dimensional?
May30-14 05:11 PM
12 949
Sorry I was unsure where to post this so I hope its ok posting it here. I'm an aspiring author and looking to...
Jun7-11 06:12 PM
1 1,171
Can someone refer me to Feynman rules for electroweak interactions in the general case of SU(2) multiplets of weak...
Oct11-11 11:40 AM
1 1,656
In the Kallen-Lehmann spectral representation...
Aug14-11 05:12 AM
Rocky Raccoon
4 2,574
Considering the modelling of a high energy proton beam neutrino experiment. I have questions concerning the scattering...
Dec14-13 06:22 PM
1 705
how do we "know" it must exist? btw im new here, dont flame me too hard
Jun16-10 03:24 PM
29 4,922
What is the mechanism for explaining the different effect of repulsion and also attraction due to the exchange of...
May12-11 08:29 PM
3 3,184

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