# 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: 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 19,010 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 26,735 Hi, How can I calculate such terms d^Aae d^ebD f^AaE f^EbD d^Aae d^EbD f^AaE f^ebD Cheers, Mar9-13 06:45 AM andrien 3 747 Our lecturer explained to us that when a stationary Higgs decays into a W+W- pair, which then each decay into an... Mar8-13 05:05 AM mfb 8 1,064 Greetings, I would like to use a synchrotron to store a stream of electrons. Usually, how long are electrons... Mar8-13 01:31 AM Vanadium 50 1 628 Hi, I'm confused about a statement about the change in final/initial states of the daughter/parent atom in an alpha... Mar7-13 08:32 AM mfb 3 650 Hi, I'm a student of Nuclear Engineering (MS level) at University of Dhaka, Bangladesh. I completed my Honours and... Mar6-13 09:32 AM Einj 1 477 I am fairly new to nuclear chemistry and I was just curious as how to find the half life of a helium nucleus. Would it... Mar6-13 09:03 AM Vanadium 50 9 810 Not sure if applicable here but I was doing some reading on ITER the fusion reactor. I have read about "Test Blanket... Mar4-13 10:31 PM Astronuc 1 542 Since the pi^0 decays to two photons its C-parity is +1, but its isospin ket is $$|1,0\rangle,$$ which makes it a... Mar1-13 06:03 AM Bill_K 3 544 (1) What do people make of NASA'a page on Low Energy Nuclear Reactions? (2) Is there anything to the... Feb25-13 09:09 AM ZapperZ 6 1,871 In a vandee graff generator, there is a way to charge the belt via friction with the lower roller. There are lower... Feb25-13 12:56 AM plasmon 0 493 Why is it that those atoms, with atomic numbers of 90 and 92 have much, much longer half lives than atoms like Radon,... Feb24-13 06:48 PM Bill_K 8 943 edit* -Delete Feb24-13 01:49 PM FeynmanIsCool 0 604 Hi can anyone explain what a quadratic divergence is? and if so how it effects the mass of the scalar field i.e why ... Feb24-13 09:51 AM andrien 3 680 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 06:23 AM mfb 2 782 If two quarks are in a S=1 state, are they in either ##|\uparrow \uparrow \rangle ## or ## |\downarrow \downarrow... Feb23-13 08:12 PM Gregg 5 645 I've been trying to understand the exact differences of a particle and its corresponding antiparticle.I know maybe the... Feb23-13 09:46 AM Shyan 10 925 Hi I have a question about a popular science article from BBC, you can ofcourse read the whole article but the part... Feb23-13 08:28 AM Simon Bridge 6 993 Hello, now I'm reading Peskin Shroeder. I have a question about the Casimir operator on page 500 in Chapter 15. ... Feb22-13 11:35 PM Wonchu 2 659 Hello, I am a PhD student in geology in need of help from a physicist! Can somebody spot the mistake in my... Feb21-13 03:57 PM mfb 1 636 Hi, i have a question, what's about Einstein 'information keeping' law in matter and antimatter annihilation process,... Feb21-13 02:43 PM mfb 1 508 My question has a few sub-questions. How long does an area stay contaminated, say after a bomb? A reactor leak? ... Feb21-13 11:01 AM mfb 5 773 I am reading the paper "Covariant Action for a D=11 Five-Brane with the Chiral Field" and want to make an analog for... Feb21-13 09:30 AM rbwang1225 2 1,139 In this articlehttp://arxiv.org/abs/0802.3525, the authors present the inhomogeneous equation \ddot{\phi}_2 +... Feb20-13 11:52 AM Forhad3097 2 902 If we tried to make elements higher than Helium in a terrestrial fusion reactor, what elements could we realistically... Feb20-13 09:58 AM Astronuc 16 1,549 Various news outlets are reporting a AAAS talk by Joe Lykken which appears to be about vacuum instability based on the... Feb20-13 01:26 AM bcrowell 2 970 I would like to hear opinions on the variation in decay rates as described by Fischbach and coworkers and how (if at... Feb20-13 12:58 AM bcrowell 3 808 As objects approach the speed of light, according to Special Relativity, they gain mass. But when this happens, what... Feb19-13 06:52 PM mfb 4 578 So apparently a neutral pion is a superposition of u\bar{u} and d\bar{d}. I'm having trouble understanding what this... Feb19-13 07:37 AM andrien 2 628 http://cosmiclog.nbcnews.com/_news/2013/02/18/17006552-will-our-universe-end-in-a-big-slurp-higgs-like-particle-suggest... Feb19-13 03:15 AM fzero 1 1,625 In my book it says for the ##\pi N ## state: ##|\pi N; \frac{3}{2},\frac{3}{2}\rangle =|\pi ;1,1\rangle | N;... Feb18-13 12:51 PM Gregg 4 577 If you have a meson in the states ## ^3S_1## and ## ^1S_0 ## this means that ##J^P = 1^+ ## and ## 0^+## doesn't... Feb18-13 12:22 PM Gregg 0 443 You Know all the LHC machine at CERN, and the CMS detector (Compact Muon Solenoid) This detector run a CMSSW ( CMS... Feb18-13 07:58 AM Vanadium 50 6 701 Hello! I´m studying Quamtun Field Theory, more concretely, Green´s functions of Klein-Gordon equation. I can... Feb18-13 05:28 AM javiepe 0 448 Hey, I'm trying to get my head around neutral Kaon oscillations. As far as I understand it neutral Kaons can... Feb17-13 04:22 PM mfb 8 635 This comes form the wiki article on quarks: Does that mean that when two Quarks come as close to each other as... Feb17-13 07:48 AM Bill_K 2 633 Hello! I´m currently taking a course in RQM and have some questions for which I didnt get any satisfactory answers on... Feb17-13 07:39 AM Kontilera 9 884 I have some basic questions about gravitons. If you have two particles with mass, do they "exchange" gravitons, if... Feb16-13 10:41 AM negru 14 1,175 News reports have it at 4.9 magnitude and a depth of 1 kilometer The USGS appears to have it at 5.1 and the depth... Feb13-13 03:12 AM Borek 1 592 How do gravitons mediate the force of gravitation in universe ? Feb12-13 10:56 AM tom.stoer 5 974 I am considering the occurence of an incident circularly polarised EM wave on a ground state hydrogen atom. The... Feb12-13 05:50 AM andrien 4 690