# High Energy, Nuclear, Particle Physics

- Properties, relationships, and interactions of subatomic particles. Exp. & theo. physics of nuclei & elementary particles
 Views: 8,277 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 20,345 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 31,769 When we have vibration excitation then the radius of nucleus is define like: R=R_0 where... Jul17-09 09:03 AM Petar Mali 4 1,176 In wikipedia http://en.wikipedia.org/wiki/Quadrupole Is this \delta_{i,j} Kronecker delta? In my notebook I have... Jul17-09 10:23 AM clem 4 1,999 In 5 years or so, if LHC fails to find any superpartners, are ALL supersymmetric theories dead? Skippy Jul21-09 02:53 AM Haelfix 6 1,545 Does anyone have a high resolution picture of the standard model lagrangian? i want to put it on a t shirt and give it... Jul15-09 11:19 PM humanino 11 15,687 Hi I am loking for those who is doing the reseach on the neutrino physics throughout the world so that we may have... Jul15-09 03:37 AM thoms2543 0 740 2 photons with energies of at least 0.511 MeV are crossing the same spot at the same time - there is 1.22 MeV energy... Jul19-09 01:16 PM Vanadium 50 5 1,231 I know that positrons are produced by beta + decay and I know that they are antimatter. My question now comes to what... Jul16-09 01:53 PM Bob S 2 2,277 I've been working on something and I seem to have hit a noose. The PDG lists many N/Delta resonances, but let's... Jul17-09 02:55 PM clem 10 1,281 One of string theory's triumphs is the post-diction of a spin-2 field, which is supposed to represent gravity (GR). ... Aug13-09 11:13 AM blechman 19 2,725 Can anybody explain what is meant by Renormalon"? What is its significance? Jul20-09 05:43 PM Haelfix 6 2,255 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 04:28 AM CompuChip 1 774 A favourite - good grief no. I don’t even understand some of the Higgsless models. I’m not a theoretical physicist.... Jul17-09 06:02 AM textbooks 0 669 How can a down quark emit a W- when decaying if the boson is much heavier than the quark or even the whole neutron? ... Jul17-09 06:29 PM humanino 2 897 What is the general rule behind why for any given lagrangian (QED/QCD show this) that any vectors or tensors contract... Jul17-09 07:54 PM Hepth 2 1,030 I have just read a book. It said that: "if symmetry is exact, interaction is a long range". Could you explain me more... Jul30-09 11:05 PM Parlyne 13 1,414 With respect to the nucleonic shell model I can not find information that indicates HOW the orbital angular momentum... Jul19-09 02:31 PM bluestar 0 906 In air, high angle scattering of alpha radiation from Am241 is almost non existent. When a sample is pulled away from... Jul21-09 10:45 PM Bob S 1 1,369 I am making the statement that all forms of CP violation across all meson sectors still do not account for the... Jul21-09 03:46 PM tiger_striped_cat 0 923 The usual perception is quantum field theory is not fundamental since it has divergence. A fundamental theory must... Jul28-09 09:13 AM ZapperZ 18 2,274 can we have a 'supersimmetric theory' in only four dimension?.. for example in gravity we have supersimmetry so all... Jul24-09 02:16 PM zetafunction 0 949 I want to know details about fixed order calculations and its relationship with parton shower. why there is need for... Jul28-09 03:29 PM neelkhan 0 1,332 What is the difference between renormalized mass and the running mass? And physical mass,pole mass? Jul30-09 06:35 PM blechman 1 1,957 I'm a new grad student preparing to do some work on Daya Bay, and I'm basically taking in all the information on... Jul30-09 07:31 AM hamster143 8 1,388 Hello there. I have a question, or better yet, a proposition on the higgs boson/graviton: would it be possible for... Aug1-09 02:08 PM Abbas Sherif 5 3,905 Susy has been offered as a way to stabilize the Higgs sector from radiative corrections, on the argument that w/o SUSY... Jul30-09 01:20 AM Parlyne 1 848 In QFT states in Hilbert space are labelled by particle type and number, momentum, spin and internal quantum numbers.... Jul31-09 12:47 AM Haelfix 5 1,167 Dear all! I am currently searching for experimental data on the sea and valence quark distribution of the proton... Jul31-09 01:36 PM Parlyne 3 2,147 Is there any solution ψ to understand how the real electron looks like after renormalization (dressing)? Aug2-09 07:50 PM meopemuk 10 2,405 Hi.I wonder is it possible to create a home made muon or gamma ray detector? And if it is possible would you mind to... Aug12-09 09:16 PM hardhacker 7 2,824 In introducing the concept of 'virtual photon',Halzen Martin writes (ch#1,P#7) "An ekectron emits a photon (the... Aug5-09 11:30 AM tiny-tim 3 1,504 The following is on CERN's website: Aug14-09 01:08 PM tiny-tim 10 1,687 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 Perhaps asking this question is like someone who just learned how to add asking about differential equations, but I... Aug12-09 05:12 PM Naty1 2 1,543 Another question that i am not even qualified to ask: So i know that all the quarks have a job creating mesons and... Aug12-09 05:04 PM Naty1 6 1,488 Hi I have computed a cross section to 10-6 GeV2. Now I have to convert it to barn, but don't know how. Can anybody... Aug12-09 07:16 PM Count Iblis 14 3,010 I'm trying to understand the energy spectrum of neutrinos ejected from the sun. Any suggestions on a book that covers... Aug12-09 02:11 AM Vanadium 50 1 1,296 Conceptually, how does one calculate hadron scattering processes from the strong force, if one has the amplitudes for... Aug14-09 12:32 AM humanino 6 2,152 Almost: the result is 85 GeV, the measured mass is 80.4 GeV. Is there anybody who has ever looked at this... Aug14-09 02:52 AM Vanadium 50 3 1,450 question is why speak about IR (short momentum) and UV (short distances) divergences ? in fact if we define ... Aug13-09 07:27 PM Sleuth 3 1,342 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 1,213