Elementary Definition and 558 Threads

Another question that i am not even qualified to ask: So i know that all the quarks have a job creating mesons and baryons. And i know the electron is a lepton with a very important job with the structure of an atom. But what is the importance of the muon, the tao, and all three nutrinoes...

Does anyone know any good book(s) about elementary particles?

Shankar p68-69 gives a mathematical "derivation" of the action of the X (position) operator, the summary of which is as follows: I followed the logic without a problem, since it only involves using the matrix elements of X in the basis of eigenfunctions of X. However, the next paragraph reads...

"Elementary excitations" VS. "Quasiparticles" What's the difference between "Elementary exitations" and "Quasiparticle"? Thanks!

Has TEW been discussed here? My apologies if so. I'm not sure where to start the discussion of this topic, so I thought I'd start at this forum, which should show you the way I'm leaning. Still, Dr. Little seems quite learned and TEW has me thinking in interesting directions. I won't link to a...

Following is a summary from Chapter 20 of Leonard Susskind's 2008 book THE BLACK HOLE WAR: I'd appreciate any further insights, especially on interpreting what Susskind says about String theory as it was vague for me. These are not exact quotes. Elementary particles are usually imagined to be...

Hi all, I'm trying to teach myself the basics of QFT. I'm using Peskin and Schroeder, and having a few difficulties reproducing a couple of the calculations. I don't think I've made careless algebraic slips, so before I show my working explicitly and beg for proof-reading I'd like to ask a...

What does "collision" mean when dealing with elementary particles? Can someone point me to some online references that will get me started in understanding what is meant by a particle collision? The issues I don't understand- Leptons and quarks are supposed to be point particles. Do they...

Homework Statement Suppose that a teacher wishes to distribute 25 identical pencils to Ahmed, Bar- bara, Carlos, and Dieter such that Ahmed and Dieter receive at least one pencil each, Carlos receives no more than five pencils, and Barbara receives at least four pencils. In how many ways can...

Homework Statement Suppose that a teacher wishes to distribute 25 identical pencils to Ahmed, Bar- bara, Carlos, and Dieter such that Ahmed and Dieter receive at least one pencil each, Carlos receives no more than five pencils, and Barbara receives at least four pencils. In how many ways can...

Homework Statement Here's the problem I don't understand and its solution: http://img11.imageshack.us/img11/5867/24545624.gif Homework Equations The Attempt at a Solution I want to write the original matrix as a product of elementary matrices but I don't know they got that...

Are there elementary, massive particles with zero spin? Thanks in advance.

Homework Statement A farsighted woman breaks her current eyeglasses and is using an old pair whose refractive power is 1.655 diopters. Since these eyeglasses do not completely correct her vision, she must hold a newspaper 39.4 cm from her eyes in order to read it. She wears the eyeglasses...

Hi, could anyone please tell me equations 6.34 and 6.31 from Griffiths elementary particles book ( the new edition)? I need to do problem 6.5, I have the old book, and I can't make any connection. Can't find the new book either right now, and I need to do it by tomorrow.. Please help, i'd...

I was thinking about sitting in a course next quarter that used this textbook, and no prerequisites are listed, so I was wondering what kind of things should I know to get through the text. The thing I am most worried about is my knowledge of QM. I only know the little QM I have studied...

An Elementary Proof Of The Beal Conjecture And Fermat's Last Theorem. By: Don Blazys. The Beal Conjecture can be stated as follows: For positive integers a,b,c,x,y,z, if a^x+b^y=c^z, and a,b,c are co-prime, then x,y,z are not all greater than 2. Proof: Letting all variables...

Homework Statement So, if the problem asks... Find the elementary matrices such that the respective matrix equation holds...what do I do? [_ _ _] [4 4 -1] [4 4 -1 ] [_ _ _] [4 -1 -5] = [4 -1 -5] [_ _ _] [-4 1 4] [-12 3 12] Does this mean to find a...

elementary charge(someone please help, i have a test tomorrow!) ok, this goes for everybody, u know how in school, u learn that an electron has a charge of -1 and a proton has a charge of +1? is this in elementary charge(e)? thanx.:)

how to present this matrix as a multiplication of elementary matrices \bigl(\begin{smallmatrix} 0 &6 &2 \\ 1& 1 &0 \\ 5&3 &1 \end{smallmatrix}\bigr) i can't understand in general what are they doing in this solution http://img144.imageshack.us/img144/9508/34036247.th.gif ??

Homework Statement I am actually trying to reproduce the research paper on "Elementary gates for Quantum computation". With reference to that paper, According to Corollary 7.4 - On an n-bit network(where n>=7), a lambda(n-2)[sigma x] gate can be simulated by 8(n-5) lambda(2)[sigma x] gates(3...

Any ideas here? For that matter, why should the spin of each particle always be the same? Or can we do no better than to say they do, and that its spin is a fundamental property of what defines each particle?

I was reading that the "exchange rows" operation can be achieved through the other two operations: multiplication by a nonzero number and adding a multiple of one row to another. Any thoughts on the actual algorithm for achieving an exchange of rows through these other two operations? I...

Homework Statement With reference to a research paper on "Elementary gates for Quantum computation", I'm unable to understand certain concepts given in it. I am providing a link to this paper which is: http://arxiv.org/PS_cache/quant-ph/pdf/9503/9503016v1.pdf Lemma 5.1 For a unitary 2x2...

Greetings Next semester I'll have solid state physics, statistical physics and and introductionary course in elementary particles. So I was wondering maby those of you who had those subjects could recommend me some books. I really liked books by Griffiths so far. Especially the one on...

Homework Statement A disk is cut into 6 equal pieces and labeled 1 through 6. On it, a player spins an arrow twice. The fraction ( a / b ) is formed, where a is the number of the sector where the arrow stops after the first spin and b is the number of the sector where the arrow stops after...

[b]1. This is a problem involving public key cryptography [b]2. 16^31 is congruent to 081 (mod 247) [b]3. I would first evaluate 16^31 and the divided by 247 to find the remainder. I know how to work with congruences, but 16^31 is a very huge number I don't know how to evaluate it into...

This isn't really a particular question...i just missed the classes relating to these 2 topics so I have no idea how to do questions with them...so can someone please explain how i go about solving questions such as: 1. I'm given 3 points in R3, and I'm supposed to find the equation of the...

Which would fit this description and with answers?

In Souriau's book of symplectic mechanics he describes an elementary dynamical system on which the Poincare group is dynamic and acts transitively. He then describes a massive particle with spin where the spin is some positive number. When we consider this particle in the presence of an external...

There was a lot hoopla recently over an elementary school's Thanksgiving tradition: http://www.contracostatimes.com/ci_11076282?source=most_emailed

Homework Statement im having problems with this question, i don't know how they got their answer. the question is: find elementary matrix E such that B=EA A=-1 2 B= 1 -2 (these are matrices) 0 1 0 1 Homework Equations elementary row operations The Attempt at a...

I'm looking over a proof and I'm wondering from which principles does it follow that \mid a - b \mid < 1 \to \mid a \mid < \mid b \mid + 1 I can see that |a - b | \le |a| + |-b| = |a| + |b| and that |a| - |b| < |a| + |b| but I just can't connect the dots.

Homework Statement a house plan has 3 different floor plans: Plan A- 3 three-bedroom units, 7 two-bedroom units, and 8 one-bedroom units Plan B- 4 three- bedroom units, 4 two-bedroom units, and 8 one-bedroom units Plan C- 5 three-bedroom units, 3 two-bedroom units, and 9 one bedroom units...

Is it a good book?

I don't have a specific question in mind but can someone explain to me how to solve a question of the type " express the matrix A as the product of N elementary matrices"

I don't have a specific question that I need solved, but can someone explain to me how to solve a problem such as "express matrix A as a product of N elementary matrices." How do i go about solving this? uu i think i posted this in the wrong forum...

Hi Homework Statement L[f] = (s)^(1/2) The Attempt at a Solution Is there actually an elementary laplace transform that can compute this? I tried using derivative to solve for it, but i'll always be stuck with a fractional exponent. Thanks

how many... till now how many elementary particles are disovered? what are bosons? what happens when fermions interact with bosons?

Homework Statement Write the given permutation matrix as a product of elementary (row interchange) matrices. \begin{array}{ccc} 0 & 1 & 0 & 0 \\ 0 & 0 & 0 & 1 \\ 1 & 0 & 0 & 0 \\ 0 & 0 & 1 & 0 \end{array} The Attempt at a Solution I found the row echelon form to be the identity...

Hi, I'm a little stuck on Nakahara's treatment about fibre bundles. I hope someone can give me a clear answer on this; they are quite elementary questions, I guess. We have: * A principal bundle P(M,G) * A fibre G_{p} at p= \pi(u) Then the vertical subspace V_{u}P is defined as a...

With exact rounding, we know that each elementary operation has a relative error which is bounded in terms of the rounding unit n; e.g., for two foating point numbers x and y, (x + y) = (x + y)(1 + E); |E| <= n. But does a similar result hold for elementary functions such as sin, ln and...

Hi, I'm sorry if this is in the wrong forum. I've been interested in science for while a white, most notably theoretical physics. In the end, I decided to go for a degree in Computer Science, but haven't lost my interest in physics. With the introduction of CERN, I'd be interested if...

The Science Channel is running an hour program on the LHC. They make a statement that the pages and pages of equations that describe BBT don't actually work because they don't explain how the elementary particles get their mass. How does this criticism get addressed or is it actually true?

it's only the second day of class but my professor assigned some problems that are those weird ones that neither he nor the book even discusses, I have tried several different methods including parametric graphing, integrating the functions, deriving the function, but to not even the slightest...

Hello, Could anyone suggest me some good resource for the elementary electronics physics. Book name or really good link online I want to get the knowledge of electric current, potential, field..and so on Thanks!

I am confused. I thought that the standard model included 6 quarks and 6 antiquarks, 6 leptons and 6 antileptons and 5 bosons (W+,W-,Z,photon,gluon). However in Griffith's "Introduction to Elementary Particles" (on page 48) he says that there are "12 leptons, 36 quarks, 12 mediators". I am...

1. A force of 9.2x10-14 acts on an unknown particle that travels at 2.40x106 m/s into a magnetic field of 4.8x10-2 T. How many elementary charges does this particle carry? I've used Fm=qvB and found q=Fm/vB and got an answer of q=7.986 x10-19 C. I'm not sure where to go from here. I assume I...

I would say by now, I'm an expert in manipulating equations and playing with algebra. However, I've also realized I have no idea why some of the operations I do are valid. For example... why is (x+2)(x-2) = x^2 - 4? Why does this expansion work? I'm guessing it preserves some kind of field...

Say I have an acute angle A in standard position in the first quadrant with a rotating arm of length r , terminating at coordinate P(a,b) . Now say I rotate it 90 degrees further from that position to the second quadrant , this ends up at coordinate Q(-a,b) . I draw perpendiculars from those...

Could someone suggest a good book for elementary QFT and particle physics?(I don't know which to read first). I have very little idea about QFT. Could someone also tell me what maths knowledge is required?