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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 62,550
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 25,946
ITER is the fusion reactor in southern France that hopefully will come online in 2018. According to wiki ...
May17-13 09:05 AM
mfb
2 995
The neutral phi meson decays to make two photons after around 8 x10-17 seconds Is this just straight annihilation of...
May16-13 02:44 PM
mrcotton
2 1,015
Hello, now I'm reading Peskin Shroeder. I have a question about the Casimir operator on page 500 in Chapter 15. ...
Feb22-13 10:35 PM
Wonchu
2 879
I seem remember hearing that spin-1 was ruled out but since reading this paper I am unable to find any info on spin-1...
Feb22-13 08:19 AM
Bill_K
2 173
What are the accepted numbers for the decay rate and lifetime of Z-> mu+mu- and Z-> e+e- decays??? also what is the...
Feb24-13 05:23 AM
mfb
2 1,244
Wikipedia says that only 3 atoms of Ununoctium ever existed? How can you detect such a tiny quantity of something? How...
Mar10-13 06:00 PM
Astronuc
2 563
Professor Susskind describes the Dirac Sea. He says remove a negative energy electron, and replace it with a positive...
Mar13-13 11:52 AM
LayMuon
2 811
I was thinking of making a cloud chamber and have looked at several videos on them. I noticed several different types...
Mar13-13 07:52 AM
mfb
2 1,002
what are standards model limits on decay of K0, Do, B0 meson into a pair of neutrino and anti neutrino. I know that...
Mar15-13 02:15 PM
Hepth
2 763
I am reading about group theory in particle physics and I'm slightly confused about the word "representation". ...
Mar17-13 01:34 PM
JoePhysicsNut
2 757
I have an unidentified radiation source. I used a NaI(Tl) detector and multichannel analyzer to collect data and...
Mar19-13 11:35 AM
the_wolfman
2 1,065
http://arxiv.org/abs/1303.1812 It seems that the recently discovered particle is indeed Higgs, as has been...
Mar21-13 10:53 AM
mfb
2 835
Well I am sure this is a lame question, but I am stuck over it for hours. I'm working on Bjorken, Drell book, and I'm...
Apr5-13 10:27 PM
Hepth
2 984
I am a beginner to QFT and I try to plot the Feynman diagram for the photon self-energy. Following Mandl-Shaw book...
Mar30-13 09:47 AM
PineApple2
2 953
In the textbook, usually the fermion mass renormalization is introduced as follows: the mass shift \delta m must...
Mar29-13 12:39 PM
phypar
2 935
what happens to the gluon linking Quarks at time of formation of quark star? whether the quark star consists of only...
Apr3-13 02:09 PM
humanino
2 849
A quark and antiquark have opposite parity. The quark is customarily taken to have positive parity. I understand this...
Apr3-13 11:35 AM
JoePhysicsNut
2 1,277
Greetings PF! This is my first post... I keep reading over and over again either "... so and so mediator is...
Apr8-13 10:09 PM
MWBratton
2 850
Hi, I am revising my intro to nuclear physics class and was wondering why is parity so important ? I mean OK, I...
Apr12-13 12:22 PM
Leb
2 1,123
The W couples to left-handed particles only. What about the Z? Is it the same? Thanks in advance!
Apr23-13 07:22 AM
JoePhysicsNut
2 878
I'm having some slight confusion over what seems to be a violation of conservation of mass: Both electrons and...
Apr27-13 10:01 AM
FireStorm000
2 899
I Found This in Wikipedia ''the speed of a tachyon increases as its energy decreases. In particular, approaches zero...
May3-13 02:43 PM
jtbell
2 702
the wiki article on the higgs mechanism says "at a critical temprature the higgs field becomes tachyonic". Does it? If...
May5-13 11:32 AM
Pseudo Epsilon
2 748
If a baryon wavefunction is \Psi = \psi_{spatial} \psi_{colour} \psi_{flavour} \psi_{spin}, and we consider the...
May12-13 03:38 AM
gboff21
2 1,029
Hello, I regard a proton-proton collision. (Target at rest.) Here accrues a K^{+}(494) -meson. I want to...
May18-13 08:55 AM
e.chaniotakis
2 1,835
In β+ decay a proton releases a positron and an electron neutrino causing the proton to change into a neutron to help...
May19-13 04:55 AM
mfb
2 1,040
Concerning chirality, I recently read that matter is left-handed and that antimatter is right-handed. Are matter...
May23-13 08:46 PM
kurros
2 1,044
Has the experiment been done to drop anti-matter and see if it falls the same speed as regular matter? I seem to have...
May29-13 01:39 PM
DrClaude
2 905
Dear Physics Forum, I was thinking about the properties of the combined electroweak force. Does it maintain the ...
May31-13 03:43 AM
mpv_plate
2 863
Hi, I have always wondered, is there a known formula that predicts the half life of an atom based on known values...
May31-13 01:33 PM
Bill_K
2 856
(PS: this post was also posted at the quantum mechanics/field theory forum, but I did not get any replies there) ...
Jun5-13 03:30 AM
andrien
2 976
Does anyone have any good technical papers covering the Majorana particle? ...
Jun3-13 04:48 PM
Mordred
2 743
Hi all, If I take an action involving two point particles coupled together by a delta function contact interaction...
Jun8-13 03:09 PM
Illuminatum
2 997
The Z0 is a linear combination of W0 and B0 bosons, so unlike the charged current interaction it can interact with...
Jun10-13 01:07 PM
bayners123
2 876
Hi Everyone. In the Resonaances blog, I recall that it was mentioned there that the particle physics group at CERN...
Jun14-13 08:44 AM
mfb
2 988
I had a look at the production cross sections for W/Z at hadron colliders. These differ as a function of energy with...
Jul5-13 12:06 PM
Vanadium 50
2 963
I'm studying the \tau \rightarrow \rho \; \nu_{\tau} decay. I'm asked to calculate the decay width, using a...
Jun21-13 08:37 AM
GWSguy
2 1,526
So I have a bit of a story here. First of all, I work in my university's radiation safety department, where, among...
Jun18-13 03:16 AM
mfb
2 1,123
http://news.discovery.com/space/quirky-4-quark-quantum-monste-discovered-130618.htm Do you think this is legit? How...
Jun19-13 04:07 AM
mfb
2 1,337
I could only find abstracts for proposals of methods that could accomplish this. I don't have any subscriptions to...
Jun20-13 05:26 PM
mfb
2 1,249

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