Feynman Definition and 617 Threads

how good Feynman Lectures are ? and if learn basic physics what mathematical physics book should i learn to learn core course physics ? Is Mathematical methods for physicists good enough ?

Is Feynman lectures on physics suitable for beginning physics (learn basics of physics) OR physics for scientists and engineers (Serway) ? i want to learn basics most powerful thx

Homework Statement Hello, I am trying to draw a Feynman Diagram at quark level for the decay sigma+ -> neutron + pi+.Homework Equations sigma+ -> neutron + pi+ uus -> udd + udbarThe Attempt at a Solution Well, the attachment is what I came up with. I have no idea if it's right to be honest...

which is the better series one can learn physics from? I've personally read feynman's but I haven't tried halliday's.

My library only had the first volume, I would love to read them all. Is it worth to buy them?. Its just that the shipping will be quite expensive to my country.

After summing up the rudiments of quantum mechanics Feynman tries to answer a question that readers might have at this point of his book, The Feynman Lectures on Physics, Vol. III, page 1-10.1. He writes, "One might still like to ask: "How does it work? What is the machinery behind the law?"...

Homework Statement I'm working my way through Quantum Field Theory in a Nutshell by A. Zee. I'm religiously doing the exercises but since I'm doing it on my own (I'm not in school) I have no one to ask when I get stuck. Any hints would be appreciated. The problem is IV.7.5, on page 253 of...

can someone please explain the attached picture to me? if the electron and positron are just annihilating each other shouldn't the positron be going the other way? and shouldn't the antiquark be going the other way too? and what's up w/ the ->t thing at the bottom?

hello, I am trying to follow the arguments in Peskin pages 96-97 where the exponentiation of disconnected diagrams are performed. I think the 'proof' is too 'not detailed' and was wondering if there exists a better explanation elsewhere? My biggest question is the sentence on page 97 "The sum...

I'm reading a course in Introduction to QFT and I'm stuck at a problem. I'm hoping someone here could point me in the right direction or say if my assumptions are incorrect. Homework Statement Derive the Feynman rules and all diagrams at tree-level for \lambda \phi^3 theory using Wick's...

Homework Statement Hello :smile: The question is from "Advanced Physics" by Adams and Allday. It is from section 9 "The Physics of Particles", "Practice Exam Questions". It is question 11, part c. The level of this study is between school and University. Figure 9.5 represents a simple...

Can anyone recommend a good Feynman diagram calculator ?

I'm trying to learn Feynman diagrams from Srednicki's QFT book! Could someone retell and summarize in his or her own words what Srednicki is saying in the three paragraphs after equation 9.11? (I don't understand what the (2P)!/(2P-3V)! different combinations are, how Feynman diagrams are...

I'm learning QFT by reading Lewis Ryder's book, so my question in short is: how he arrives at Eq 7.57 and Eq 7.58? If you don't have the book, the question is: why are there Minkowski metric terms in the Feynman rules for a gauge field coupling to itself? If the answer is complicated, simply...

I got my final pick of books as extra readings/studying to supplement my rather deficient Physics C class. It's the Feynman lectures on Physics and Irodov problem book (and when my calculus is ready, I'll tackle Introduction to Mechanics by Kleppner and Kolenkow) How do you think should I...

...like in Photon-Photon-scattering. I know this doesn't make sense physically but the value for the diagram should still be computeable. If I want to put the expression for the matrix element together, I get a matrix, but it should be a scalar, right? Since the spinor bi-product is missing...

I'm not sure if this is the right place to post a graduate level course material, but I have a question about perturbative expansion of the 2n-point function of a scalar field theory. Homework Statement First, the question: In which space (position or momentum) is the topological distinctness...

A friend introduced me to this very strange, very funny video of Richard Feynman. Has anyone seen it? What a guy...:smile:

Homework Statement Draw the Feynman diagram for: e^{-} + p \rightarrow n + \upsilon_{e} Sorry, I don't know how to make everything even but you should get the gist. Homework Equations The Attempt at a Solution Well, what I have is the electron and proton annihilating(and this...

Homework Statement Q) Neutral pion decays into 2 photons which then decay into electron-positron pairs. What would the feynman diagram look like? :confused:

Homework Statement In an ABC toy theory, the only allowed vertex is one that couples A, B and C. Thus there are no AAA, ABB, ACC...ect vertices allowed. My question is suppose a diagram has na external A lines, nb external B lines, and nc external C lines. Develop a simple criterion for...

The Perimeter Institute has a talk on the Feynman chessboard / checkerboard model scheduled for a few days from now. This will be recorded and you can play it back, sometime after November 18th. Links: Speaker(s): Garnet Ord - Ryerson University Ord's website...

Hello I have to calculate symmetry factors for the following feynman diagrams for my qft class, and would be hugely grateful if anyone could point out any mistakes (I'm sure there are lots!) that I've made. http://picasaweb.google.com/jessicagreerstanley/Physics#5259179071440262450"...

I just got a copy of Feynman's lectures on Physics the other week. They are very interesting. Near the end of the 4th chapter, he begins discussing conservation laws. One of the laws he gives is the conservation of baryons. I noticed early in the first volume, the lectures were published in...

what does Feynman's diagram prove? i know it deals with something "going back in time"

Well, I have got hold of Feynman's Lectures Volume 1,2,3... I am trying to understand UnderGrad physics through self-study at home... Are those 3 books enough to understand (at least conceptually) UnderGrad level physics?

I need to insert the slash notation, A\!\!\!/ , into a Mathematica document. I have searched high and low, but find nothing on this.

Can anybody help me by explaining how to write down the Feynman rule corresponding to a term like ieA^{\mu}\phi^{\ast}\partial_{\mu}\phi I am confused about the presence of the derivative term. Terms have usual meaning.

"You know, the most amazing thing happened to me tonight. I was coming here, on the way to the lecture, and I came in through the parking lot. And you won't believe what happened. I saw a car with the license plate ARW 357. Can you imagine? Of all the millions of license plates in the state...

I intend to refresh my knowledge in physics, and exercise a great deal of math. I will do some heavy calculus, dif, linear algebra work with some quantum mechanics added onto it. The thing is I also want to read the feynman lectures I bought long ago. Do you think that it is reasonable to...

Okay I've just paid £50 for the feynman lectures on ebay, waiting for it in the post. Anyone here have it and can tell me whether I've wasted my money (i'm 17 and havn't even started learning particle physics yet, I've just finished AS levels). Am I going to understand it or not? Also is...

I would like to clearify the connection between n-point functions, Feynman diagrams and S-matrix. I do not want ( yet) to understand the detailed derivation of the LSZ reduction formula, just the rough connection between the n-point function on the one side and the S- matrix on the other...

Just out of curiosity, how hard is Fitzpatrick's online Graduate version of quantum mechanics compared to the Feynman lectures and Sakurai's book?

Hi, I was just reading feynman's nobel lecture the other day ("The Development of the Space-time view of qed") where he discusses the problems associated with his initial view that an electron does not act on itself but merely acts on other electrons. He talks about the "force of radiation...

in peskin-schroeder and http://www.hep.phy.cam.ac.uk/batley/particles/handout_04.pdf" the amplitude for e^-e^+\rightarrow \mu^- \mu^+ is written using feynman rules as follows -iM=[\bar{v}(p_2)(-ie\gamma^\mu )u(p_1)] \frac{-ig_{\mu\nu}}{q^2}[\bar{u}(k_1)(-ie\gamma^\nu )v(k_2)] but what...

Homework Statement I’m trying to learn Feynman diagrams from Peskin and Schroeder. I’m stuck right now on page 91-93, especially about constant factors and symmetry factors. Equation 4.44 and the two constants 3 and 12 in it make perfect sense to me. The trouble starts with 4.45. I understand...

Feynman refers to "renormalization" as a dippy process on p.128 of his book "QED - The Strange Theory of Light and Matter". His words are: "The shell game that we play to find n and j is technically called renormalization. But no matter how clever the word, it is what I would call a dippy...

"...the observed masses of the particles.." R. Feynman Feynman wrote: "Throughout this entire story there remains one especially unsatisfactory features: the observed masses of the particles, m. There is no theory that adequately explains these numbers. We use these numbers in all our...

In reading Feynman's "Lectures on Physics", volume 2 I have a question and have included a scan of a small section from the book. Feynman was a big fan of using the Principle of Virtual Work, but his explanation, as least insofar as how he used it is wanting, at least for me. The attached...

1. Feynman says all of electromagnetism follows from Maxwell equations. 2. Somebody (Pointing to a Feynman diagram of a photon/electron reaction) said all of electromagnetism is in that one diagram. So, can anyone help me with these two questions: how does point 1 come from point 2. And, how...

Hi, This question is quite relevant to some other posts at the end of the very long "very simple QFT questions" thread, but I've decided to start a new thread with a heading which is more indicative of what I wish to ask the group. As a question, it's a fairly concise, but the analysis is...

"Feynman integration trick" - textbooks? I was quite impressed by the use of the parametric differentiation e.g. in integrating sin(x)/x in https://www.physicsforums.com/showthread.php?t=80735. Can anyone recommend textbooks that cover this use as a strategy in evaluating integrals? Ideally...

What distinguishes Fermions form Bosons in Feynman diagrams?

[SOLVED] feynman rules Hi , It is a simple question from the book of david j .griffiths :"introduction to elementary particles" (6.11) Homework Statement (a) Is A--->B+B a possible process in the ABC theory (feynman rules for a toy theory) (b)Suppose a diagram has nA external A lines , nB...

is there any program that can generate the feynman diagram for a specific perturbation of n-order contributions to Green function?

I'll be studying electromagnetism next sem (January) and I thought reading Feynman before the proper start of course will be useful, but Feynman himself said( in the preface) that he did not do much creation in vol II. So, is there any other Feynman sort of book on electromagnetism or I should...

Hi, I've got a Masters in Physics, but always feel that I'm missing out slightly by not knowing and appreciating the beauty that there is in all the maths I never had cause to study in my physics degree. Is there a book (or set of books) that does for maths what the Feynman Lectures do for...

Hello all. Firstly, know that I need a little handholding. We are told that in the detail, the actual behavior of matter is better modeled with quantum theory concepts, apparently to a impressively proven accuracy, even if the mathematical aids involve counterintuitive, though useful, notions...

I read from 'strange theory of light and matter' by feynman that light also travels faster and slower than C but on an average it travels at C..can anyone explain the reason behind or give me some links..

Hi everybody, I am a MAC OS X user, and I have a trouble with feynmf package in latex. I have downloaded the package from CTAN website and followed the instructions for installation. Then in my latex file I coded a generic 2-body scattering process labeled as "generic", after typesetting...