# High Energy, Nuclear, Particle Physics

- Properties, relationships, and interactions of subatomic particles. Exp. & theo. physics of nuclei & elementary particles
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 Views: 8,397 Announcement: Two free ways to get Gold Membership! Jan17-12 Meta Thread / Thread Starter Last Post Replies Views Pinned: Forum Rules Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a... Feb23-13 09:41 AM ZapperZ 1 20,364 Pinned: Higgs particle is 'found' ( 1 2 3 ... Last) God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered... Jul11-12 02:13 AM tom.stoer 178 31,829 I'm trying to derive the lie algebra for the conformal symmetry group and was curious if anyone could help? I'll go... Aug23-09 08:27 AM Jim Kata 4 1,470 The following is on CERN's website: Aug14-09 01:08 PM tiny-tim 10 1,688 the idea is let us supppose we have a well behaved theory where only logarithmic divergences of the form ... Aug15-09 12:31 PM genneth 1 746 For neutron we all know, it has the 15 minutes of fame before it decays, what is the theoretical bound on proton's... Aug25-09 01:54 PM Vanadium 50 15 1,821 According to Steven Weinberg ('The quantum theory of fields', vol.1), the principle of gauge invariance stems from the... Sep3-09 07:57 AM Bob_for_short 15 3,124 Hi everybody, I don't know if this is the right section to ask for such a question but I have been dealing with this... Aug24-09 06:34 AM Sleuth 9 2,117 I am reading wikipedia term"dineutron" but i can not understand this sentence in red. ... Aug16-09 01:17 AM Vanadium 50 3 2,467 The masses of the elementary particles are renormalized somewhat, when the energy (the momentum) increases. Assuming... Aug19-09 03:25 PM Avodyne 3 1,065 I understand that when , say, several protons and neutron come together to from a nucleus they loose some mass and... Aug17-09 06:15 AM fatra2 1 1,084 Dear Experimental Particle Physicist, I have a simple question on how to calculate the Acc value from a MC dataset.... Aug15-09 01:55 PM penguindecay 8 1,216 If you fire energetic ionising particles, like electrons or protons, at a stationary target, the important... Aug28-09 07:56 AM magphys 2 1,237 When I look at a nuclear level scheme, there are many gamma ray transitions from energy levels of say, spin 4 to spin... Aug19-09 03:59 PM Vanadium 50 1 1,022 I'm having a little trouble recreating some things from a paper and it is due to my lack of knowledge of working with... Aug24-09 02:21 AM Hepth 2 1,061 thanks Aug21-09 01:12 PM Naty1 17 2,733 While deriving Einstein's energy mass relation , we observe that E2 = m2 x c4 but by taking square roots of both... Aug20-09 01:14 PM Aamir.hussain 0 783 Does any body know how quarks are formed? and why they always in fraction numbers like 1/3, 2/3. Since charge are... Aug22-09 01:10 PM Bob_for_short 2 1,043 Hello, I have one question. The most probability annihilation is e+ + e- -> y + y with spins -1/2+1/2=-1+1. But I... Aug22-09 03:50 PM Bob S 2 1,485 If you combined these elements does it decrease the nuclear fusion reaction because of the fission or do i have this... Aug25-09 10:11 AM Bob S 6 1,175 I understand why Fusion releases energy.. The product is "lighter" than the reactions and the missing mass is... Sep1-09 12:30 AM mahela007 8 3,264 I watched some interesting videos on the Large Hadron Collider (LHC) and it raised a whole ton of questions. If my... Sep2-09 12:34 PM ViewsofMars 4 2,314 Hello PF members, I curious to know some basic idea..why the line shape of nuclear decay is displayed as a... Aug25-09 05:17 PM Rajini 2 1,062 I would like some tips about what book I should read if I want to properly understand the relation between local... Aug27-09 07:01 AM George Jones 2 1,363 Having discovered up, down, strange, charm and bottom quarks, why did scientists undertake similar experiments using... Aug26-09 06:57 PM Naty1 2 1,176 I have so far learned that nuclear forces are strongest forces acting at short ranges. But how do they behave at a... Aug27-09 11:59 AM rozan977 0 768 Hi I'm trying to understand very basic aspects of the WZW model, and would appreciate any help. The main thing i... Aug27-09 03:34 PM Jim Kata 0 773 Hi, Could someone tell me please what is the scientific consensus(or some interesting theories) on why do muons... Aug28-09 04:05 PM Bob_for_short 8 1,863 I have worked out the total spin for the elements up to Neon however I hit a snag with Nitrogen and Fluorine. The... Sep4-09 10:59 PM PeterDonis 1 884 I have a question about the nature of matter on earth, the most stable form of hadrons which exist on earth are made... Sep1-09 01:43 AM Vanadium 50 1 885 Hello: The gauge symmetry of the standard model is written in authoritative places like wikipedia :-) as... Sep3-09 08:14 PM javierR 5 2,046 Suppose I want to find the minimum velocity of the electron and positron required to make a Z boson during... Sep4-09 06:25 PM hamster143 2 1,357 Can nuclear weapons explosion produce "neutrino pluse"? Sep9-09 08:08 AM Astronuc 9 2,215 I'm curious as to whether parameters like rest mass and mixing angles, half-life for 2nd/3rd gen and other properties... Sep11-09 01:16 AM ensabah6 3 912 1-Half life is the time it takes for half of the nuclei in a sample of radioactive material to decay(Am I right?). Why... Sep11-09 07:13 AM PrincePhoenix 8 2,024 I was wondering if we could create a device that could interact with neutrinos and extract their energy to some... Sep10-09 05:34 AM Bob_for_short 4 3,488 Hi, everyone! There was a recent paper arXiv:0807.4454v2 where authors present a revised version of Paris... Sep10-09 05:33 AM quZz 0 901 When writing a reactivity in dollars, what is the proper notation? Would it be 0.43$or$0.43? or is it just 0.43?... Sep10-09 04:20 PM Astronuc 1 2,901 Can someone please clarify beta decay for me. As I understand it, in B- decay, a neutron turns into a proton,... Sep11-09 02:41 PM Astronuc 5 2,650 I have been learning particle physics lately but it's been mostly from a theoretical perspective and not a... Sep11-09 08:01 AM Astronuc 1 8,371 If an nuclide can be fissioned by thermal neutrons does that always mean it can be fissioned by fast neutrons. If not... Sep13-09 06:14 PM Astronuc 1 3,621 How is fusion initiated with a laser? What are the difficulties that are preventing physicists from using it? Sep14-09 11:11 AM Bob S 1 895

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