High Energy, Nuclear, Particle Physics

- Properties, relationships, and interactions of subatomic particles. Exp. & theo. physics of nuclei & elementary particles
 Meta Thread / Thread Starter Last Post Replies Views 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 01:13 AM tom.stoer 178 34,714 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 21,131 hello I would like to know the frequency width of a decaying axion Lets say the axion has a mass of 10^-6 eV and it... Jul14-09 03:00 PM hamster143 1 1,477 Hi, im a newcomer, and i have a question about an integral shown as follows, \int d^{3}p_{2} \frac{1}{2E_{2}}... Jul17-09 03:28 AM CompuChip 1 790 In air, high angle scattering of alpha radiation from Am241 is almost non existent. When a sample is pulled away from... Jul21-09 09:45 PM Bob S 1 1,407 What is the difference between renormalized mass and the running mass? And physical mass,pole mass? Jul30-09 05:35 PM blechman 1 1,994 Susy has been offered as a way to stabilize the Higgs sector from radiative corrections, on the argument that w/o SUSY... Jul30-09 12:20 AM Parlyne 1 863 the idea is let us supppose we have a well behaved theory where only logarithmic divergences of the form ... Aug15-09 11:31 AM genneth 1 759 I'm trying to understand the energy spectrum of neutrinos ejected from the sun. Any suggestions on a book that covers... Aug12-09 01:11 AM Vanadium 50 1 1,325 I understand that when , say, several protons and neutron come together to from a nucleus they loose some mass and... Aug17-09 05:15 AM fatra2 1 1,097 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 02:59 PM Vanadium 50 1 1,039 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 09:59 PM PeterDonis 1 898 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 12:43 AM Vanadium 50 1 904 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 03:20 PM Astronuc 1 2,988 I have been learning particle physics lately but it's been mostly from a theoretical perspective and not a... Sep11-09 07:01 AM Astronuc 1 8,698 If an nuclide can be fissioned by thermal neutrons does that always mean it can be fissioned by fast neutrons. If not... Sep13-09 05:14 PM Astronuc 1 3,720 How is fusion initiated with a laser? What are the difficulties that are preventing physicists from using it? Sep14-09 10:11 AM Bob S 1 913 Is anyone here familiar (more or less) with the new type of telescope called IACT, Imaging Air Cherenkov Telescope. ... Sep16-09 12:59 AM Vanadium 50 1 732 I can't find the value of the Yukawa coupling g, for neutron-proton scattering for example, where the Yukawa potential... Sep20-09 05:47 PM clem 1 2,617 Quark physics is completely out of my depths but I was wondering if, in a nucleon, they assume certain orbitals like... Sep21-09 08:31 AM clem 1 883 When it is said that the relative strength of weak interaction is \ 10^{-5},what does this mean? On calculation I... Sep22-09 04:36 PM hamster143 1 3,625 Hi everyone! Can somebody briefly explain me what the GIM Mechanism (Glashow, Iliopoulos, and Maiani) is and why does... Sep24-09 10:57 AM humanino 1 4,282 The Higgs particle is said to be required for mass. Does this mass in this case mean inertia? Surely all that is... Sep26-09 06:51 AM krishna mohan 1 1,175 Where does most of the heat energy in fission reactions come from? -Does it come from radiation emitted from... Sep28-09 10:18 AM QuantumPion 1 1,062 Hi I have a question about Lorentz invariant measures, consider an integral of the form: \int d\mu(p)... Nov12-09 04:19 PM hamster143 1 2,733 Is there a defined distance at which Electromagnetism starts exerting more force than the strong nuclear force? So... Oct6-09 11:40 AM Meir Achuz 1 971 I'm trying to calculate the pauli-lubanski pseudo vector for different representations of the poincare group. The... Oct6-09 08:11 PM Wriju 1 2,228 Hi, I am trying to understand relations between Homology/CoHomology and Homotopy group..I am familiar with Hurewicz... Oct7-09 11:04 PM Haelfix 1 1,096 what is the difference between a beta particle and an electron in terms of its behaviour and pysical properties like... Oct9-09 10:26 AM Bob_for_short 1 912 Hi, I am having much trouble on this particular question. Here it is: Four “point” gamma ray sources are... Oct10-09 01:00 PM Astronuc 1 2,854 An American physicist is investigating the possibilities of the development of a hyperdrive at the LHC. If you're not... Oct11-09 10:28 PM vanesch 1 792 In what relation to each other are the direction of spin vector and direction of polarisation vector.... for example... Oct13-09 05:45 AM Vanadium 50 1 1,661 If there are three vectors a=(1,0,0) and b=(0,1,0) what vector will be a+ib (i - is a complex) Is it possible to... Oct12-09 04:16 PM Phiphy 1 954 Anybody knows what is the physical meaning of hypercharge in electroweak theory? Oct14-09 03:07 PM Ben Niehoff 1 1,023 Where can I get reliable information on the cross section of various substances: boric acid, O2, Uranium, water, etc? Oct16-09 10:22 PM Bob S 1 1,228 I have a theoretical question. When doing canonical quantization, and writing the equation for he time evolution of... Oct23-09 06:23 AM Bob_for_short 1 807 I've been wondering ever since I read about mesons, how they can exist. Shouldn't the particle anti-particle pair... Oct24-09 09:25 AM Vanadium 50 1 2,600 Hello guys, I have a large amount of data... and I was wondering if there is a Time Of Flight (TOF) calculator out... Oct27-09 12:08 PM Bob S 1 3,873 What is an isoscalar nucleus? I guess it should be a nucleus with isospin T=0. In the place where I... Oct27-09 07:44 AM Vanadium 50 1 2,595 Hi, did I understand this correct: The Yukawa matrices are the couplings of the particles to the Higgs filed. They are... Nov22-09 06:47 AM ansgar 1 2,196 Here are two pages showing examples of the Cherenkov radiation: http://physics.syr.edu/hep/rich.html... Nov15-09 11:38 AM Vanadium 50 1 1,458 Can anyone walk me through this calculation? I'm not completely sure how to do it (merely a student). So is this... Nov22-09 04:48 AM Vanadium 50 1 735