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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 62,473
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 25,926
Is there a theoretical basis for the spin of the nucleus of an arbitrary atom? I'm looking at this website:...
T 05:48 PM
mfb
6 148
Well I'm trying to understand the difference between these propagators: \frac{g_{\mu \nu}}{k^{2} - m^2 + i...
T 11:59 AM
ChrisVer
0 71
I have a question related to the Lorentz invariance. (on the book of Mark Srednicki Quantum Field Theory, page 35...
T 08:23 AM
ChrisVer
1 199
I can't seem to find the mass of an anti electron neutrino in MeV. I found that in beta radiation one down quark...
Y 04:34 PM
mfb
8 1,248
As is well known, the charges through which particles interact scale with the energy in QFT. What I was wondering is:...
Y 07:22 AM
arivero
10 330
A 100 mg sample of magnesium-27 decays by 7% of its previous mass every minute. Determine its half-life and start the...
Aug29-14 07:26 PM
Meir Achuz
5 209
In the page http://en.wikiped ia.org/wiki/Hamilton%E2%80%93Jacobi%E2%80%93Einstein_equation, under Shortcomings of...
Aug29-14 01:57 PM
ChrisVer
1 224
- - -
How would one calculate the velocity of a 1MeV neutron?? I tried the following the attached formula for V/C but E...
Aug27-14 05:03 PM
mfb
5 412
I am wondering how Muons are manufactured. Wikipedia says they're the decay products of cosmic rays, and that...
Aug27-14 05:00 PM
mfb
7 265
I know how the canal rays are produced. As I looked from wikipedia; "The process by which anode rays are formed in...
Aug27-14 04:55 PM
mfb
4 305
What is difference between beta particle and electron? I mean in spin, mass or other properties.
Aug27-14 04:47 PM
mfb
23 592
I am curious as to what would happen if you took something that was as cold as you can get and mixed it with something...
Aug27-14 02:54 PM
ChrisVer
2 220
What is nuclear evaporation (e.g. proton or neutron evaporation)? Someone can explain? Thank you very much, Matt
Aug25-14 03:28 PM
Matt_014
2 296
Hello to everyone, I got a little bit confused between the coupling constant g_W and the strength parameter...
Aug25-14 01:59 PM
Daaavde
2 273
Hi all, I were wonder how the particles which consisting of four quarks like Z(4430) state ( ##c\bar{c}d\bar{u}## )...
Aug25-14 12:35 PM
Safinaz
2 341
In Chapter IV.3 of Quantum Field Theory in a Nutshell] by A. Zee (2nd Edition), there is a section titled "Wisdom of...
Aug25-14 03:10 AM
mal4mac
6 410
I want a book on particle physics which contains lots of theoretical calculations.All books recommended in my class...
Aug24-14 08:32 PM
nrqed
4 450
Hi Based on what I know (it might be wrong) properties of nuclei are calculated based on the different (simplified)...
Aug24-14 03:04 PM
Bjorken X
7 449
Hi there, I need to draw the Feynman graphs for D→KK meson . I would be appreciate if anyone can help me. Thank you...
Aug24-14 12:39 PM
ChrisVer
5 383
Sorry for my questions, (it does seem like QFT triggers quite a lot of questions :-D). Anyway, on page 103 (it has...
Aug23-14 08:32 PM
nrqed
14 2,299
Can actually muons interact and give a signal while they go through the Hadron Calorimeter of the ATLAS? I think in...
Aug23-14 06:42 PM
mfb
10 450
To anyone new to the field of nuclear physics, the units are positively nonplussing. For example, I have just...
Aug23-14 07:46 AM
Vanadium 50
1 251
Hello, I am interested in computing the optimal depth of a copper absorber for Sr-90 decay electrons. I want to find...
Aug23-14 04:44 AM
Orodruin
2 326
Hey gang, I'm re-working my way through gauge theory, and I've what may be a silly question. Promotion of...
Aug22-14 12:40 PM
ChrisVer
7 402
Hi, I have been getting a little confused; the text book (and from what i can see on-line) are saying that Hadrons...
Aug21-14 05:57 PM
ChrisVer
6 310
How W- boson decay into electron and anti neutrino?
Aug21-14 10:37 AM
smk
4 328
A gauge field W_\mu is known to transform as W_\mu\to W'_\mu=UW_\mu U^{-1} +(\partial_\mu U)U^{-1} under a...
Aug20-14 10:31 AM
The_Duck
8 437
The reason why there is far more matter than anti-matter in our universe is because we are going forward in time. But...
Aug19-14 02:09 PM
berkeman
2 355
Hi, I have a question in Srednicki's QFT textbook. In p.460 section 75(about Chiral gauge theory), it says "In...
Aug19-14 01:08 PM
mkgsec
6 352
Hello, Is there a quantum mechanical reason why elements 119+ might not exist? i.e. would the crazy orbitals...
Aug18-14 11:42 PM
pierce15
9 494
It is possible to introduce the gauge field in a QFT purely on geometric arguments. For simplicity, consider QED, only...
Aug18-14 03:50 PM
The_Duck
1 525
I learned that Pauli principle says two fermions cannot be same place than how we can collide two protons actually its...
Aug17-14 06:22 PM
UVCatastrophe
5 552
I am looking at the structure of protons, and in my script, when they define the Parton Distribution Functions of all...
Aug16-14 06:06 PM
RGevo
9 597
We know that graviton spin is 2 so other lepton and quarks spin is 1/2 I am confused because If Graviton and a quark...
Aug16-14 09:30 AM
mfb
15 508
Looking at the attachment, I see that the scalar potential coming from the D-term of the Higgs sector is given as...
Aug16-14 08:35 AM
Greg Bernhardt
1 705
At the end of spontaneous symmetry breaking I get these mass terms: ...
Aug15-14 04:16 PM
Orodruin
2 473
The Monte Carlo simulation is a very important tool in particle physics specially to tune in the preciseness of the...
Aug14-14 03:10 PM
DrDanny
4 1,067
I am confused about the very step from Eq.(14) to Eq.(15) in the paper http://arxiv.org/pdf/hep-ph/0308157.pdf There...
Aug13-14 10:17 PM
Greg Bernhardt
1 509
Hi folks, I am looking a bit at the phenomenon of S-duality (as a bit of an amateur) and looking at the literature...
Aug13-14 10:17 PM
Greg Bernhardt
1 456

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