Recent content by opous

Homework Statement The \Sigma hyperon exists in three charge states (+1,0,-1 in electron charge units) Show that it has strangeness S = -1. Homework Equations The Attempt at a Solution I'm not too sure how to approach this question. I've been studying SU(3) quark diagrams where...

Can anyone help me understand what is meant by the "parity of a wavefunction"? I know in terms of even/odd parity, that: P \Psi(x,y,z) = \pm \Psi(x,y,z) ie, P = +/- 1 But I don't know what "parity of a wavefunction" physically means...

^ Oh, I do apologise. I was misreading your post. I probably didn't express my original point very clearly. The graph I attached there wasn't included in the question, it was simply the only one I could find which had the required axes (differential xs/angle) and mentioned scattering (labelled...

I'm using Das and Ferbel Intro. To Nuclear and Particle Physics (II ed). I'm aware of the Wood-Saxon potential and it's uses in describing these models, I was trying to express that I'm unsure how it's related to a characteristic of the strong force. ie, is the graph telling me that the strong...

Homework Statement A beam of low energy protons is observed to scatter elastically from a target of neutrons. Sketch the variation of the differential cross section with the resulting scattering angle and comment on a characteristic feature of the strong force than can be deduced...

Ah, got you, so redoing the Muon one: \lambda_{muon} = \frac{hc}{pc} = \frac{hc}{\sqrt{E_{tot}^{2} - (m_{0}c^{2})^{2}}} Giving \lambda_{muon} = 3.21 fm I think I get that now, thanks for the clarification hage567 and jtbell!

Unless... I use this: E^{2} = p^{2}c^{2} + m_{0}^{2}c^{4} E = mc^{2} = KE + m_{0}c^{2} p^{2}c^{2} = KE^{2} + 2KEm_{0}c^{2} + m_{0}^{2}c^{4} - m_{0}^{2}c^{4} pc = \sqrt{KE^{2} + 2KEm_{0}c^{2} So... \lambda_{kaon} = \frac{hc}{\sqrt{KE^{2} + 2KEm_{0}c^{2}}} = 0.51fm...

^ ok, so considering the total energy: E_{tot} = pc + (m_{0}c^{2}) ie, pc = E_{tot} - m_{0}c^{2} So I should be able to use: \lambda = \frac{hc}{pc} = \frac{hc}{E_{tot} - m_{0}c^{2}} for the total energy expression? This would give \lambda_{muon} = 4.21fm where m_{0,muon} =...

OK, I've found a couple of different formulae which seem to hint at a way into this question: \lambda = \frac{hc}{\sqrt{2mc^{2}K}} where mc^{2} is the rest mass energy and K is the Kinetic Energy. This would mean that: 1. \lambda_{kaon} = \frac{1240eVnm}{\sqrt{2m_{kaon}c^{2}2.0GeV}}...

Would anybody be able to advise how I would approach the following question? I know the deBroglie wavelength is h/p, but I'm unsure how to calculate p based on the kinetic/total energy...

[SOLVED] Klein Gordon equation, probability density Homework Statement Use the Klein-Gordon Equation to show that \partial_{\mu}j^{\mu} = 0 Homework Equations KG: \left(\frac{\partial^{2}}{\partial t^{2}} - \nabla^{2} + m^{2}\right) \phi = (\partial_{\mu}\partial^{\mu} + m^{2})...

Got it! Thanks Dick :)

Ahh, thanks very much Pam - makes sense now!

Homework Statement Use the Schrödinger Equation to show that \frac{\partial}{\partial t}(\Psi^{*} \Psi) = - \underline{\nabla}. \underline{j} Homework Equations \underline{j} = \frac{-i}{2m} \left[\Psi^{*}(\nabla \Psi) - (\nabla \Psi^{*})\Psi]\right \frac{\partial}{\partial...

I've read a few texts where the term "minimum sized wavepacket" is used. Can anyone explain what the "minimum size" refers to in the context of a wavepacket? Thanks.