# 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 Views: 119,249 Announcement: Follow us on social media and spread the word about PF! Jan16-12 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... Jul18-14 12:32 PM ChrisVer 187 58,257 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 25,104 Binding energy is typically used to talk about the amount of energy needed to separate bound particles. This means... T 09:47 PM Vanadium 50 11 296 The uuu hadron doesn't violate Pauli's exclusion principle presumably because there is color. But even without... T 05:47 PM geoduck 0 55 Since everything is energy, can fermions and bosons be (theoretically) converted to energy too? T 04:49 PM mfb 2 82 i searched Steven weinberg in google scholar. it returns many articles but "a model of leptons" why does "a model of... T 02:11 PM Greg Bernhardt 1 313 Three questions, In a femtosecond laser, or any laser for that matter, how is a pulse generated from noise? how do... T 02:11 PM Greg Bernhardt 1 561 Why is there seemingly so little interest among particle physicists about discovering the graviton? Is it because it... T 12:33 PM The_Duck 2 103 Hello! I'm not entirely sure this is very "scientific", but I have an idea that I would like some feedback on. I... T 01:12 AM Whyisthat21 3 531 So I've been researching Dense Plasma Focus devices for a while now and a question just occured to me. Since the fill... Y 10:31 PM Warpspeed13 2 894 Although I am a newer publishing thread here, I notice this forums for a long time. And I hope someone could help... Y 09:13 PM zhangguoqiang 0 145 I would like to ask, to make it clearer to me, what does chirality means? and how can someone see whether his theory... Y 05:01 PM Greg Bernhardt 1 984 What's the difference between a neutrino and a Muon? Will a neutrino induce fusion the same as a muon? Does muon... Y 07:42 AM Orodruin 7 241 So depleted uranium is mostly U-238 which can't sustain a chain reaction. If you were to compress depleted uranium to... Jul27-14 11:23 PM Warpspeed13 21 1,545 Take a look at the attachment, my question is obvious from the colored points. The attachment is from:... Jul27-14 07:57 PM ChrisVer 0 236 I am trying to derive the algebra and I get a factor of 2 wrong... Consider the Lorentz group elements near the... Jul27-14 02:40 PM samalkhaiat 9 768 The action for Yang-Mill's theory is often written as  S= \int \frac{1}{4}\text{Tr} (F^{\mu \nu} F_{\mu \nu})d^4 x... Jul27-14 02:12 PM samalkhaiat 2 255 I have three questions about ICF, in the explanations i have read on the internet about ICF they all explain that the... Jul27-14 10:50 AM the_wolfman 1 348 http://en.wikipedia.org/wiki/Inelastic_collision An inelastic collision, in contrast to an elastic collision, is a... Jul27-14 08:27 AM Vanadium 50 2 241 A charged lepton can absorb a W+ boson and be converted into a neutrino, and visa versa. The neutrino has such small... Jul25-14 08:39 PM ChrisVer 4 613 Hey everyone i'm new here and this is my first thread, although i have great interest in chemistry and physics my... Jul25-14 06:53 PM mfb 2 435 So I've done some research, but to no avail. Can anyone link me to some reasonably detailed information regarding the... Jul25-14 06:36 PM mfb 6 740 Sorry for my questions, (it does seem like QFT triggers quite a lot of questions :-D). Anyway, on page 103 (it has... Jul21-14 01:49 AM MathematicalPhysicist 7 1,564 I understand that, for example, a thick enough sheet of lead can absorb gamma radiation, but I want to understand what... Jul20-14 05:42 PM mathman 1 779 https://lh4.googleusercontent.com/-MODAPtaDFhY/U8utJMbxycI/AAAAAAAAWcQ/TtLYdzqeoLM/w266-h259-no/IMG_20140720_075036.jpg... Jul20-14 09:50 AM anorlunda 2 720 I am new to QFT and found myself wondering the following. Particle physics experiments usually consist of looking at... Jul20-14 04:57 AM DarMM 7 2,647 I read some of the articles related to particle physics experiment and don't know the meaning of it. 1. minimum... Jul19-14 04:50 PM mfb 3 888 I had an argument at my university about it, since experiments at LHC aren't 100% confirmed. I mean, gauge theories... Jul19-14 04:14 PM tahlaskerssen 9 996 Hi all! I am not sure how to prove mathematically that the expression for the probability that a neutrino... Jul18-14 08:50 AM Trifis 7 2,269 When a proton collides with a proton say at the LHC, is vacuum field theory used? It seems like you shouldn't have to... Jul17-14 04:48 PM mfb 4 1,745 I don't understand why antimatter exists in the first place. Could you explain why and how an asymmetry developed... Jul16-14 04:59 PM phinds 7 2,498 In a comment http://motls.blogspot.com.es/2014/07/cms-sees-650-gev-leptoquarks.html#comment-1479399237 to Motl's blog,... Jul16-14 07:11 AM arivero 5 1,584 Hi. on page 95 , I am not sure how did he derive the second term on the RHS of equation (13.16). ... Jul15-14 11:36 AM MathematicalPhysicist 4 1,365 If one has a 4-fermion vertex, like in Fermi theory : ##G_f (f_1 \Gamma f_2)(l_1 \Gamma l_2)## And you are... Jul15-14 08:39 AM Hepth 2 1,229 Since plants contain proteins that help them identify gravity in order to grow the right way, and they also contain... Jul14-14 04:13 PM Ryan_m_b 13 2,211 I was curious as to the difference in free neutron decay and the lack of decay when bound in a nucleus. I found the... Jul14-14 03:53 PM mfb 5 1,689 Greetings to all I had some problems using MCNP5 for gamma shielding calculation. The original input file is from a... Jul14-14 02:11 PM salmankhan 14 4,207 Hi. I am currently studying about representations of Lie algebras. I have two questions: 1. As I understand, when... Jul12-14 11:00 PM spookyfish 11 2,529 Hello, I have a gamma spectrum of one element (X). There are several gamma peak in the spectrum. For example, 800... Jul10-14 03:19 PM mfb 14 3,190 I'm stucked in a passage of Particle Physics (Martin B., Shaw G.) in page 41 regarding neutrino oscillations. ... Jul10-14 03:15 PM George Jones 6 2,221 How can someone think of the neutrinos as non relativistic? OK I understand for example that the neutrino temperature... Jul9-14 04:55 PM Orodruin 13 2,949 Wikipedia says CERN has isolated about 38 atoms of antihydrogen and maintained them for over 15 minutes? ... Do you... Jul9-14 03:59 PM SteamKing 5 2,372